Brake Controller Installation: Starting from Scratch
Brake Controller 7-Way Installation Kit 4-pole Trailer Connector (if not already installed)
Four of these wires need to be connected individually, and three lead to the 4-pole adapter. The 4-pole adapter will plug into the vehicle's own 4-pole trailer connector, allowing for basic wiring functions without the hassle of splicing or cutting into your vehicle system. The three basic wiring functions are for tail lights, stop lights and turn signals. NOTE: This 4-pole installation is vehicle specific. If your vehicle does not already have its own 4-pole trailer connector, use the Wiring Fitguide to find the harness recommended for your vehicle.
The first wire (black) runs to the vehicle's battery to supply power to the trailer connector. This wire is called the "12 volt hot lead."
The second wire (blue) runs to the brake controller to supply power to the trailer brakes. This wire is called the "brake wire."
The third wire (white) gets grounded to the vehicle's frame. This wire is called the "ground wire."
The fourth wire (yellow) hardwires to the vehicle's reverse lights. This wire is included with 7-way connectors but not 6-way connectors and can be tied off if it is not going to be used.
7-way trailer connector, which includes a 4-pole adapter The mounting bracket secures to the vehicle's bumper or other appropriate mounting location and harbors the trailer connector. Mounting hardware, such as self-tapping screws, is included to mount the bracket to the vehicle and the trailer connector to the bracket.
The gray duplex cable houses two wires that will become the 12 volt hot lead and brake wire. The duplex cable runs from the trailer connector to the front of the vehicle.
The black loom is a hard plastic tube that covers the 12 volt hot lead and brake wire connections at the trailer connector, protecting the connections and giving your installation a professional appearance. Circuit breakers act as midway connections for the 12 volt hot lead and the brake controller power supply (introduced later) before they reach the vehicle's battery. Butt connectors help to make connections between wires. Ring terminals attach to the end of wires and hook around battery posts and circuit breakers. Zip ties help to bind loose wires together and prevent them from interfering with vehicle components such as brake and gas pedals.
Find a suitable location to mount the 7-way connector. A typical location is on the bottom of the bumper. Using the self-tapping screws, secure the mounting bracket into the bumper and the trailer connector into the bracket.
Plug the 4-pole adapter coming out of the 7-way connector into the vehicle's 4-pole trailer connector. Ground the 7-way connector by screwing the white wire into the frame of the vehicle. Make a small cut in the rubber sheath of the duplex cable and slightly separate the two wires inside. Use a butt connector to connect the black wire in the duplex cable to the 12 volt hot lead (black wire on the 7-way connector). Then do the same for the white wire in the duplex cable and the brake wire (blue wire on the 7-way connector). Next, route the duplex cable under the vehicle all the way up to the engine compartment under the hood, being careful to avoid hot areas or those that may pinch the cable. Before you proceed further, the brake controller needs to be mounted. We will return to the duplex cable shortly.
Choose an appropriate mounting location for the brake controller mounting bracket. A typical location is the lower right side of the dash, which allows easy access to the brake controller in the event of an emergency braking situation.
Using the screws provided, install the mounting bracket into the dash. Make sure you avoid drilling through components on the other side of the dash.
Secure the brake controller into the mounting bracket. The four wires on the brake controller will be connected shortly.
Return to the duplex cable under the hood, where the brake wire (now white) needs to be separated from the 12 volt hot lead (black). The 12 volt hot lead will stay under the hood, where it will be connected to the positive post of the battery via a 40-amp circuit breaker. The brake wire will be routed through the firewall into the vehicle, where it will later be connected to the brake controller. It is best to run the brake wire through an existing grommet or knockout in the firewall. If none is found, a hole can be drilled. Make sure both sides of the firewall are clear of obstruction before drilling.
Using a butt connector, connect the blue wire coming out of the brake controller to the brake wire (white wire of the duplex cable) that was routed through the firewall. Find a safe location under the hood or on the firewall to mount two circuit breakers: one 20-amp (or 30-amp; see brake controller instructions) and one 40-amp. After those are secured, route the 12 volt hot lead to the 40-amp breaker via ring terminals and then to the positive post on the battery.
The black wire coming out of the brake controller is the brake controller power supply. Route this wire to a 20-amp (or 30-amp) breaker under the hood and then to the positive post on the battery. There are now two wires connected to the positive post: the 12 volt hot lead and the brake controller power supply. NOTE: There will be excess wire after the 12 volt hot lead or brake wire connections have been made. If any brake controller wires are too short, use the excess wire from the 12 volt hot lead or brake wire to lengthen them as needed.
The white wire coming out of the brake controller is the ground wire. Route this wire to the negative post on the battery. It will be too short to reach the battery, so you will have to use excess wire from the 12 volt hot lead or brake wire to complete this connection.
Inside the cab, we only have one connection remaining. Find the wires connected to the brake switch at the top of the brake pedal. Using a circuit tester, find the wire carrying a signal when the brake pedal is engaged. Use a quick splice to connect this wire to the red wire coming out of the brake controller.
With the brake controller mounted and connected, zip tie any loose, excess wires underneath the dash and under the vehicle. DO NOT allow the wires to interfere with the brake and gas pedals, and keep them away from areas of excessive heat.
Marcel F.
10/31/2023
I have the Curt echo wireless brake controller. How would the wiring be different when I use this kit?
Mike L.
11/15/2023
@MarcelF What you'll really need is the # ETBC7L. The only difference is the # ETBC7 has a duplex cable that's ran to the front of the vehicle, while the # ETBC7L has a single wire. The wires ran to the front on the # ETBC7 carry the 12V feed to the trailer and the brake controller output. For the # C51180 Echo brake controller, you don't need that output wire. Hope that helps explain it!
Dave D.
9/14/2023
Installing Tekonsha P3 controller in a 2008 Tahoe with factory wiring. Have searched the videos and articles/reviews for details on where to wire in the 20 amp circuit breaker. Can it be mounted under dash between the black controller wire and the red w/ black stripe Tahoe wire?? Or, should it be mounted to the fender under the hood, and wired into the brake control power wire going to the larger post?? Thanks for any help!
Mike L.
9/14/2023
@DaveD The tow package harness you'll connect the controller to is already fused, so you won't need a breaker. The linked article will explain the install for you, check it out!
Carl
8/29/2023
I’ve got a 2007 Gmc 2500. The original control box was sending 12.49V to the 7 blade connection Blue wire at the back of the truck. I bought a new control box and upon installation delivered that the white wire ground feeding the original control box had come loose. Thinking that was the problem with the first box, I reconnected the white wire feeding box and checked voltage again. Now the blue wire at the back of the truck (in the 7 way truck connector) has 6.30 v all the time. I’m I correct in saying if the brake pedal is not pressed nor the “emergency” or manual switch on control box is not pressed, there shouldn’t be any voltage to the truck rear plug??
Carl
8/29/2023
@Carl *I meant to say that the control box was sending 12.49v to the trailer all the time.
Mike L.
8/30/2023
@Carl Not sure what you mean by 'control box', are you speaking of the OEM brake controller? You'll see a volt or two at the output pin without the manual switch, which is the controller 'checking' to see if a trailer is connected. You shouldn't see full voltage. If you ARE speaking of an OEM controller, I'd suggest replacing it with an aftermarket model, because the OEM controllers back then weren't very reliable. The Tekonsha # TK90160 would be a good choice.
Mike L.
8/30/2023
@Carl It might sound like a dumb question, but which pin are you getting the voltage at? The brake output pin is in the 5:00 position.
Helpful Links
Larry
8/27/2023
Where can I tap into the white wire ( cold side) to add a brake trailer controller?
Mike L.
8/30/2023
@Larry For an '87 GM truck, look at the fuse panel located in the foot well behind the e-brake pedal. Look for a male push connector labelled 'NAT'. If you use a circuit tester like # PTW2993 on that connector, and it powers up with the brake pedal pressed you can install a female push connector on the red brake controller wire and make your connection there. If you can't find that terminal on the fuse box, or if it doesn't show a brake signal, you can tap into the 3rd brake lamp circuit instead.
Glenn
8/25/2023
i need to know what color wire is on the cold side of the brake switch on a 2023 outback and if there is an easier place to access that wire? I aint no spring chicken.
Mike L.
8/28/2023
@Glenn We don't have any information on the 6th gen Outback as far as wire color goes. The previous generation used a brown and white wire, so you can test that one with a circuit tester like # PTW2993. If the brown/white wire only shows voltage when the brake pedal is pressed, you've found the correct wire. You can also test the other wires exiting the stop lamp switch. If you still can't find the correct wire, you can tap into the wire feeding the 3rd brake lamp. A switch like # RM-751000 would also provide a brake switch signal.
Glenn
8/29/2023
@MikeL Thanks Mike . You helped a lot. It also confirmed my suspicions about using a wire at the back.
Kenn
7/25/2023
So... do I need to connect the 12v Aux wire on the 7-pin to my battery? From what it looks like, if my trailer doesn't use this 12v feed then I don't need it. Is this thinking correct?
Mike L.
8/3/2023
@Kenn That is correct. If you don't need that 12V feed, you don't need to connect it. That being said, if there's a chance that you might upgrade to a trailer that needed that feature some time in the future, it won't do any harm to make that connection.
Adam B.
5/1/2023
does the trailer controller red stop switch wire require a 12 volt stop signal or will a 5 volt work as well to activate the brakes?
John H.
5/4/2023
@AdamB 5 volts will not work. On vehicles we've come across that have less than 12 volts on the red wire, we've had to pull a 12 volt signal from somewhere else. Our usual go-to is the CHMSL fuse in the fuse box with a fuse tap.
Dave M.
11/14/2022
installing a 7pin trailer connector and brake controller on my 1998 Tahoe. There is a orange and blue (#10 size) wire folded back and taped off in the factory trailer harness cable (ORN -PWR and BLU DRK - AUX) Is either of these the wires that go to the brake controller connection thats under the dash. I have not started the controller install yet, was hooking up the 7 pin plug first.
David B.
11/15/2022
Dave, the best way is to test the wires; then go through the basic testing procedures listed in the linked article.
Helpful Links
Tractor D.
1/24/2023
@DaveM I think the blue is brake and the orange is a charge lead. Did you ever find out?
Mike L.
1/25/2023
The blue and orange wires mentioned ARE intended for the installation of a brake controller. The blue wire is intended for the output from the brake controller to the 7-way trailer connector, and the orange wire is intended to supply 12-v power from the vehicle battery to the 7-way trailer connector. The wires run along the driver's side frame rail from behind the rear wheel and terminate under the master cylinder/brake booster.
Ed B.
2/21/2023
@DaveM Yeah those are the right wires. The ones at the back are easy to find. They stop at the engine area taped up behind another group of wires about 10 inches from the bottom of the firewall and below the master cylinder.
Mick O.
9/7/2022
Hi, I have a 2011 F150 with factory brake controller. When I connect a braked trailer and apply the brakes the stop lamps are dim when applied and it has blown the fuse before. when using the manual override the turn signals light up and not the stop lamps? any help would be hugely appreciated Cheers Mick
David B.
9/7/2022
The dim lights is a bad ground connection or a short. If the turn signal is lighting up I would get a circuit tester and check the function of the circuits at the vehicle and trailer connection. Sounds like something is wired backwards.
Helpful Links
Warren Z.
7/24/2022
I installed your ETBC7 kit using your 5535 draw-tite brake controller and 20127 plug in harness on my 1994 chev silverado K-1500. The lights on my truck and car trailer work O.K. until I put my foot on the brake petal, my 15 amp turnsignal / stop light fuse blows. I tried disconnecting the red stoplight wire from the stoplight switch. still have same problem. Can you help me solve this problem?
David B.
7/26/2022
If your breaker keeps blowing you have a short somewhere, so get that circuit tester out and start searching for that short! Also make sure you are using the right size fuse/breakers.
Helpful Links
Danny
2/27/2022
I have a 2013 Ford Expedition XLT and hooking up a Hopkins Towing Solutions Multi-Tow 4 Flat to 7 Blade and 4 Flat Adapter, 47185. I also will be using a CURT 51180 Echo Mobile Electric Trailer Brake Controller with Bluetooth-Enabled Smartphone Connection, Proportional for my brake controller. I will be using for my camper. On the 7 pin connector hookup. Following the instructions with the installation I connect the 4 pin pre-wire to the one on my truck and also installed the white wire ground form the 7 pin to my vehicle frame. 1. Do I need to hook up the purple to the reverse since I will be using for my camper 2. Should I hook up the Auxiliary black wire to the battery? If so I will need to run a wire back to the battery and use an auto circuit breaker? 3. On my wire harness on the vehicle has the separate Electric Brake wire is cap off. Should I hook it up to the blue wire even if I will not be using a Brake controller inside the vehicle but using the Echo Mobile Electric Trailer? I do hook the wires up can I just leave it connected?
Les D.
2/28/2022
Regarding the wire for 12 volt trailer accessory, the wire for brakes, and the wire for a back up circuit, if it were me, I would hook up all wires provided, and fuse them as necessary. This trailer will not be the last thing you tow, and if you are going to the trouble to have a standard 7-way round connector, I would set it up for standard RV use.
But to answer your question, based on your intended use, you would not have to use the blue wire brake controller out put, nor the purple reverse circuit. The Curt bluetooth brake controller does require the 12 volt accessory line to be powered.
Danny
2/28/2022
@LesD Thanks for the response. I did hook up all the wires except the purple reverse wire for now, but I plan on also installing to have all the wires for possible future usage and/or if I sell the vehicle. I just have to figure which wire on my vehicle rear lights to connect the purple wire. On the 12 volt trailer assessory, I installed a 10 gauge primary wire from the 7 pin to the battery with a 40 amp auto reset breaker. Tested all wires and verify working. Good to go.
Kim
3/15/2023
@Danny I will also be using the Curt Bluetooth controller. What wire from this kit did you connect to the brake wire by pedal since we aren’t using a under dash controller?
Mike L.
3/17/2023
Which brake controller are you planning on using? I might be able to help with that....
David M.
1/31/2022
I am installing a class lV hitch on my 2022 Subaru Outback and need to install 7 way trailer plug. Would like the plug to have screw wire connectors on the back of the plug. The car has a pre wired connector for this prepose. I would like to get the correct wire harness to install. The trailer has tandom axles and brakes. I would like to install a proportional brake controller with a dash mounted controll knob. Could you help guide me to the correct parts? THANK YOU Dave M
Les D.
2/1/2022
@DavidM for a 7-way connector socket which has screw down terminals you can use the Hopkins # HM48480 connector.
Regarding a proportional dash mounted brake controller, I recommend the Tekonsha Primus IQ Trailer Brake Controller # TK90160. Although it can be a knee-knocker getting in and out of your vehicle, I like the smooth operation, and easy to use manual brake lever.
Sean
7/14/2022
@LesD I've got the Primus IQ and am trying the find the brake signal wire to tap into on the 22 Outback. There're 5 wires that plug into the switch, white, yellow, black, blue/red, and green. Do you know which one it is?
David B.
7/26/2022
Hey Sean, I would call or go over to your closest Subaru dealer and have them look at it or see if they can tell you the correct wire. If you don't want to do that you'll need to test the circuits for function.
Sean
7/26/2022
@DavidB
Thanks for the reply. I did end up testing the wires and it was the yellow one. I think in the video they may be referring to the brown wire in the rear harness that the 4 pin connector plugs into.
John A.
11/7/2021
I have a 2005 Dodge Dakota 6 wires on my brake light switch witch one do i use ?
Tom T.
9/19/2021
What size wire do I need to use to run from the front of my motorhome to the rear it is a 40 foot motorhome? Thank you
Les D.
10/14/2021
@TomT The wire that runs from the brake controller in the front of your vehicle to the 7-way connector at the back of your vehicle should be 12 gauge or larger. Since you are running a longer distance than others, it would not hurt to use the heavier 10 gauge wire like the # 10-1-1 blue wire.
Michael M.
9/17/2021
@JonG I have a 2020 Dodge durango. I have to hard wire my brake controller in. On my wiring harness for the brake it has 2 12 gauge wires black and blue and 16 gauge red and white. On your wiring diagram it says to use 12 gauge or higher. Should I match the wires according to my wiring harness or use 12 gauge on all? Also is a 20 amp circuit breaker adequate?
Les D.
10/14/2021
@MichaelM there is a nice drawing at the link below which shows wires from the battery, and the 12-volt brake wire should all be 12 guage and the others could be like 16 gauge. The brake wire we use on installations is # 10-1-1
Helpful Links
John
8/31/2021
I have a 09 GMC Sierra 1500 on the brake controls wires on the truck side we have blue, red/black. ,green , yellow on the controller it Blue, black , white and red help
Victoria B.
9/9/2021
Those are non-standard wire colors for the GM factory brake controller wiring harness. The bundle typically includes 4 or 5 wires: red/back, white, light blue, dark blue, and possibly an orange wire. I have linked a help article with more info. If you are sure that you have the right wire bundle, the best option is to use a circuit tester to determine which wire has which function. The brake controller wires will be wired black to 12V power, white to ground, blue to brake output, and red to stop light signal.
Bob R.
8/19/2021
Wouldn’t the controller be on all the time wired up this way? Shouldn’t there be relay to supply key on 12v?
Victoria B.
8/26/2021
Most controllers have a sleep mode that they enter into after about 15min of non-use. They pull minimal power in sleep mode, but will maintain any settings for different trailers - if the controller has that ability. If your controller has these settings features and something is added to the system to essentially key the controller to the ignition, then these settings would not be maintained when the vehicle is not on.
Jeff W.
7/18/2021
Is there a difference if i use the bolt on circuit breakers as opposed to the in line blade stlye? I have an in line and i feel it may be tripping after initial brake application. Touareg towing a 23.5 foot travel trailer. Thoughts?
Jon G.
7/19/2021
As long as it's rated appropriately for your application then you can really use any type of circuit breaker. I will say that if your current circuit breaker keeps tripping when you hit the brakes then that leads me to believe that the circuit breaker is bad or you have some bad wiring (or connection) somewhere. Unless it's the circuit breaker, a new circuit breaker won't solve anything.
Jeff W.
7/19/2021
@JonG
Thanks, the brakes work but sometimes feel like they ease off after initial application in light braking situations.
I will adjust and play around with the controller when i pull out tomorrow.
Too much makes it lock at low speeds so i backed it off, i have now warped my second set of front rotors! Go figure!
Jon G.
7/14/2021
That is correct. The 12V hot lead doesn't have anything to do with activating the brakes (unless you have a wirelesss controller that draws power from it). We do recommend installing the 12V power when installing a brake controller though because a lot of trailers that require the 7-Way setup draw 12V power for some reason or another. Might as well run 2 wires while you're underneath the vehicle so you dan't have to get back under there at a later date to install the 12V power.
Todd
7/14/2021
So if its blowing a fuse when I hook up blue wire it's more than likely bad grounds, or no??@JonG
Jon G.
7/14/2021
@Todd It could be a bad ground or some damaged wiring somewhere. Also check any connections to make sure they are clean, secure, and in good shape.
Marty W.
6/27/2021
I have a 2016 Nissan Frontier with tow package. I have a Tekonsha POD #39523 when plugged into trailer, no green LED, when brakes applied goes red. there is 12 volts on the red wire when the brakes are applied but only getting max 3 volts on the blue wire no matter what the sensitivity knob is set at. when activating the manual lever does nt show any change of voltage at all. Does this mean the controller is bad.
Jon G.
6/28/2021
It could potentially mean it's a bad controller. What kind of voltage are you seeing on the black wire that's going to the controller? This should be a constant 12V so if it's anything less then that would be where your problem is at instead.
Jon G.
6/28/2021
@MartyW Since that's the case it sounds like something is going on with your brake controller. This has a 5-year limited warranty so if you're within that timeframe you can take advantage of that. If you are further out than the 5 years or you just want to upgrade then I'd go with the Primus IQ # TK90160 which is a proportional controller (applies trailer brakes in tandem with tow vehicle) and it has a limited lifetime warranty.
Marty W.
6/28/2021
@JonG. Thanks for your time and input, I'm looking to upgrade then. Thanks again
Kenneth T.
5/25/2021
I have a 2018 chevy colorado with the trailering package but no brake controller. Bought one and decided to wire it in myself. Under the panel on the driverside kick plate are the four lose wires used to connect the brake controller to. Red, Black, white/blue, blue. When I connected it all up according to my truck manual, the papers that came with the controller and via [online] videos my trailer when connected is constantly receiving the Ebrake signal cause the brakes to be locked up. I believe the white/blue wire is the one that should only send power when applying the breaks. Checking it with a multimeter it reads at .50v at rest and pops up to 12v when the break pedal is applied. How would I go about fixing this wire or connecting to the appropriate wire to make this thing work correctly?
Jon G.
5/26/2021
@KennethT While I can't speak to the wire colors you are seeing right now, I can speak towards attaching the aftermarket wiring to your truck. Most aftermarket wiring harnesses use the same colors so I would use the connections below:
Blue - 7-Way Output to Trailer
Black - 12V Power
White - Ground
Red - COLD Side of Stop Light Switch (only gets hot when brake pedal is pressed)
It sounds like you might have something wired incorrectly so you'll want to make sure everything is connected per function as opposed to per wire color.
Jon G.
5/19/2021
I don't know right off-hand what the wire color is but you should be able to find out by using a circuit tester and seeing what wire gets hot only when you press the brake pedal.
Larry
5/17/2021
2020 Durango R/T having problems locating the cold side of brake switch, have 3 wires going to switch found the hot wire but unable to figure out which wire is the cold side, using a test light to check but neither wire turn hot while pressing the brake pedal
Jon G.
5/18/2021
Does your tester use an LED light or an incandescent light? We've found at times that the LED option works better because the voltage can be on the lower end. If you absolutely cannot find the cold side of the brake light switch then you might want to install the Universal Stop Light Switch # RM-751000.
Christian T.
5/12/2021
j'ai un GMC terrain 2017 et j'aimerais savoir quel est le fil sous mon tableau de bord qui me donnerais le signal pour activer mon controlleur de frein. Merci
Jon G.
5/12/2021
I'm not seeing anything in the owner's manual about what wire color you need to be looking for. You'll need to use a circuit tester to see what wire gets hot only when your brake pedal is pressed.
Rick H.
4/2/2021
Simular question as most others. My RV has the 7 blade and only four wires. Under the dash has the trailer connection. 4 prong. Can I run a new blue wire to the controler by cutting the blue wire from the controler and connecting the new blue at that point. That makes the blue all the way to the trailer connector?
Jon G.
4/3/2021
If you were to route your own 10 Gauge wire from the controller back to the 7-Way that would work, yes. If your RV has the 4 wires under the dash though you may have some of that wiring already ran so it's worth taking a look. Typically when there are loose wires like that you will find the rest of the bundle of wires somewhere on the driver's side frame.
Bruce B.
3/27/2021
I have a 2008 dodge 1500 ram my trailer brake started popping circuit breaker when brakes were hit I got to checking with a test light at the 7 pin connector and the one that go's to the trailer is hot all the time I cant figure out what is causing this I have used it for about 5 years the truck has the factory connector under dash and the break controller came with the harness to plug into it any help would I could use it will also pop breaker if you ground it to pin in 7 pin connector
Kef G.
3/30/2021
It sounds like you might have a short somewhere. Check your wires (starting with the black 12V wire) for any frays or damage. If you find any, make sure to replace those wires. Also, if you haven't already, you should replace the circuit breaker as well.
Sharon
3/24/2021
I have a 2005 Toyota Sequoia that has no wires for towing. I have already put a hitch on it but now have to figure out how to hook it up when there is no wires. Please help
Dtf
3/22/2021
Followed this exact diagram and got my 2005 BMW X5 wired up with a Prodigy P3 controller. Only difference is I picked off the brake signal from next to the battery off the X393S plug, PIN 10. Can't believe I got this thing wired up for about 200 bucks by myself, thanks guys.
Ron J.
3/21/2021
I have a '98 Tahoe. I'm having trouble reaching the wiring at the break pedal switch to patch in the red wire from the brake controller. Is there an alternative area where I can tap into the cold wire besides under the dash?
Kef G.
3/24/2021
Unfortunately, there isn't a better place. However, you may be able to reach the wires with a pair of long tweezers or pliers. You can usually find these kinds of tools at your local hardware store.
Joe F.
3/17/2021
According to diagram blk lead is power for unit then sends signal to trailer wat is 40 amp cb for? Blk lead has a 20 cb
Jon G.
3/18/2021
The 20A circuit breaker is for the power wire on the brake controller while the 40A circuit breaker is for the power wire that goes from the battery back to your trailer via the 7-Way.
Bob J.
3/1/2021
1) I have a Prodigy P3 controller that I want to wire into a 2020 Pacifica Limited. The wires at the brake pedal switch are a very small gauge. should I pick up the brake light power for the controller there or somewhere else where there may be a larger gauge wire? 2) There are three wires at the brake light switch. Are the left and right stop lights powered separately from the brake light switch?
Jon G.
3/4/2021
1) If the wires you're seeing are no smaller than 16 gauge then you should be just fine.
2) I'm honestly not sure if they are on their own circuit or not. I would kind of doubt it though since they all would be activating at the same time.
Brian B.
2/22/2021
I have a 2013 Town & Country Touring L that already has the 7 pin connector installed. Would there be a spot under the driver side panel that would already have the brake controller wires? Thanks!
Jack T.
2/15/2021
I have an RV on a Mercedes Benz Sprinter Chassis 2021. i would like to connect a Tekonsha controller. Controller has a 4 pin connector . Thanks
Jon G.
2/16/2021
If you have a 2021 MB Sprinter 2500/3500 chassis then you can use the adapter # 3063-P to plug the controller into the plug under your driver's side dash if you have the factory tow package. If you don't have the factory tow package then you'll need the pigtail # # 20127 as well as 4-way and 7-way connectors. You may also need the stop light switch kit # RM-751475 to get the brake light switch signal for the controller.
Dave O.
1/18/2021
I have a 2017 GMC Acadia Limited. Before I bought it there was a receiver hitch and a GM 7-pin connector installed. The fuses and relays for the trailer are also installed in the engine fuse block. However, there are no leads, and no socket for a brake controller. Is kit ETBC7 what I need to install a controller? Thanks.
Jon G.
1/20/2021
I looked in the online owner's manual at the brake controller section and it says that you should have some blunt cut wires above the parking brake assembly. The bundle should include the follow colors:
Blue - To the trailer
Red/Black of Red/Blue - 12V power
White/Blue - Brake light switch
Black - Ground
Let me know if you can't find these and I'll help you out further.
Dave O.
2/1/2021
Thank you. After taking the panel out multiple times without finding it -- I did this afternoon. It is a connector near the parking brake. It was taped back with electrical tape and I didn't realize it was an addition and not part of the bundled wires. Now I have quite a few choices for a controller. Thanks again.
Steve G.
12/26/2020
I have a Tekonsha Prodigy (purchased in 2007) that I used in my old 2006 Dodge truck, I now have a 2019 Ram 1500 (new body style), can I use my “old” Prodigy with my new 2019 truck ? if so, which wiring harness would I need to purchase ? thanks for your response.
Jon G.
12/28/2020
Yes, you can install your Prodigy brake controller using the Wiring Adapter # 3024-P for your 2019 Ram pickip.
Zach B.
11/19/2020
I bought a 2016 Chevy Duramax Diesel shuttle/passenger bus 3500. I purchased a wireless trailer brake system that I mounted inside my trailer. There is a 7 pin connector attached at the back of the bus, but once I hooked up my trailer and didn’t receive power to my brakes I noticed it was only a flat 4 pin setup. There’s a 12 gauge blue and red/white wire taped underneath the steering column. I checked the red/white wire and it does in fact have 12v power. Is safe to say I can use these to wire back to the 7 pin?
Jon G.
11/20/2020
You probably could make that work but you'll need to find a way to route it back outside so you can attach it to your 7-Way. It'll probably just be easier to make a connection directly to your tow vehicle battery and then route the wire underneath the vehicle, keeping away from hot or moving parts. To accomplish this you can use the kit # BRK-ELECKIT which comes with 10' of wire and some additional things for the installation. You'll likely need more than 10' of wire though so be sure to add part # 12-1-1 to your order which is 12 gauge wire that we sell by the foot.
Adrian P.
10/26/2020
I have a Tekonsha primus IQ2 and my vehicle does not have a fancy adapter thing to plug into. My question is the 4 wires coming out of the controller can you tell me where they are supposed to connect to red blue black white Thank you in advance
Jon G.
10/27/2020
Red - COLD Side of Stop Light Switch (only gets hot when brake pedal is pressed)
Blue - 7-Way Output to Trailer
Black - 12V Power
White - Ground
Randy
10/10/2020
good morning one of our service trucks is a 1997 f350 dump the wiring harness for the brake is under the dash near the ashtray. the brake controller was not engaging so I bought a new hopkins controller. when I plugged it in I got the e1 error long story short I could not find the ground or short so I rewired the entire controller wiring by passing the old harness. and rewired the plug in I still get the e1 error but the brakes engage I can't put the truck in service until the digital read out shows engagement thoughts? oh the traile is a brand new superior oversize covered trailer thanks for the help
Jon G.
10/12/2020
Try checking out the connector on your F-350 for the trailer. Make sure all of the wires are in good working order - especially the wire for the brake controller. I know you said your trailer is brand new but it wouldn't hurt to double check your trailer wiring. You can confirm that it's good by hooking the trailer up to another one of your trucks.
Randy
10/12/2020
@JonG
thanks
checked the trailer on another vehicle
worked perfectly.
I will have the truck side reworked and let you know
thanks
Mirek
10/4/2020
I have a 2013 Hyundai Sonata I am towing pop up RV with (Starcraft about 1400 lbs). This is an upgrade trailer for me as I started with a little coleman (900 lbs) that did not have electric breaks. My question is what does it take to have the electric break wired on this trailer. I have the 7 way to 4 way connection and trailer lights and blinkers work. I have several extra wires (blue, black, white i believe) with the connector. If i purchase a break controller can I use the current wiring or does a cable need to be run again all the way to the battery. I have a 4 way plug coming out of my trunk. I purchased 7 way to 4 way plug set up because the trailer has 7 way plug. Can I do this myself or should i take it to a car electrician or a shop ? I have no clue about any of this but if it is very simple I could probably get the job done :)
Jon G.
10/5/2020
It sounds like you have something similar to the Hopkins Adapter # 37185 installed on your 2013 Hyundai Sonata. If you're wanting to install a standard-style brake controller then you can just use the Wiring Kit # 5506 to finish up the connections for the 7-Way. If you want to go with the Curt Echo Brake Controller # C51180 instead then you can just use enough 10 Gauge Wire # 10-1-1 to go from your connector all the way to your positive battery terminal. The only other thing you'll need is a 30A Circuit Breaker # PK54530 in-line on that same wire.
Roy ..
9/8/2020
Have a new 2020 Silverado 1500 truck did not come with factory installed trailer brake switch . So I ordered the original switch that fits in dash and installed it but it will not connect to the wiring harness the dealer provides with new truck so my question is how does it wire up . Or how do I find where to wire it in.
Jon G.
9/11/2020
I'm not sure how the OEM brake controllers install so you might need to reach out to a dealer about that, but the aftermarket brake controller harnesses, like part # 3016, connect inside the junction box near the emergency brake pedal on your pickup. You can check out the installation instructions on the 3016 product page for a visual.
Jp
9/3/2020
I have a 2005 Ford E450 RV. I have installed a brake controller under the dash using the existing vehicle plug dedicated to the controller. I have an existing 7 blade connector at the rear of the RV with four wires for stop, turn and running lights. issue I have is finding the connectors that are set up for the tow package namely the blue and orange wires that come out of the wiring harness. Did Ford put in a brake controller and rear 7 pin connection but didn't route wires for brake and voltage?
Jon G.
9/4/2020
For the Ford vans (which includes the E-450 chassis) you should be able to find the clue and orange wires like what is mentioned in the linked article. I will say that sometimes on RVs the wiring or other parts can be different so if you absolutely cannot find this wiring then you'll need to run some of your own wiring and make your connections. You can do this with 10 gauge duplex wire # 10-2-1, a 40A circuit breaker # 9510, and whatever ring terminal size fits your battery.
Helpful Links
Chris H.
8/17/2020
I'm installing a brake controller and a 7 way plug on a 1995 Ford F Super Duty, single cab flat bed dually. I have a 3035 wiring harness adapter to connect the brake controller to the trucks wiring under the dash/radio. I believe i found the harness it plugs into. My question is- if i use the 3035 adapter, do i still need to install the circuit breakers and run two wires back to the 7 way plug? I've already wired the 7way to the truck 4 way, minus the blue/electric brake and black / power wires. I am not seeing any other wires run to the rear of the truck, except the 5 factory wires for rear lights. No brake or power wires.
Jon G.
8/21/2020
So a 4-Way trailer connector only carries the light functions for a trailer, if that's all you have on your 1995 Ford pickup then yes, you will need to run some additional wiring. The good news is that it sounds like you have a factory installed 4-Way and that you also have the factory wiring for a brake controller already existing on your truck. This means that instead of running the wires all the way to your cab you should be able to connect them to the orange and blue wires that exist in the bundle of wires near your driver's side frame behind the rear wheel. According to the instructions for the Tekonsha Wiring # 118242 it does look like you'll still need to install fuses and relays. I recommend checking out those installation instructions as well as this helpful article on wiring.
Helpful Links
Jp
9/4/2020
@JonG
I've looked at each bundle even unwrapped the harness to look at the colors, stretched them out but the connector wires are MIA. i'm thinking since there is a 7 pole connector welded to the receiver that it is factory installed and they didn't install the connectors I'm searching for. But the wires should be accessible somewhere back there.
thanks for the input
Sorin N.
8/8/2020
The instructions say to connect the hot lead and the e-brake controller directly on the battery. This would add a constant drain to the battery when engine (alternator) is not running. What's the purpose of providing a "hot lead" to the trailer that can potentially discharge the vehicle battery? Isn't better to run those trough a relay that provides power only when ignition is "ON/Aux"?
Jon G.
8/10/2020
Great points! Any trailer brake controller that I've looked into has such a small amount of draw when it's not being used that it would take a few weeks of the car sitting parked for it to completely drain the battery. If you plan on keeping your trailer hooked up to your vehicle and you don't want the trailer battery to drain the vehicle battery then you can either install a smart charger or you can install an Isolation Solenoid # 277-000096 which will cut power when the ignition is off.
Jim C.
8/6/2020
I have a 2008 tundra that doesn’t have the factory tow option. It was wired for a 4 pin blade receptacle. Now I’m trying to wire it for a 7 pin connector with trailer brakes. I installed the 7 pin receptacle on the bumper and plugged it into the plug that I disconnected from the 4 pin. I already installed the brake control unit in the cab. My problem now is I don’t have the last 2 wires ( the electric brake wire and the power wire ) running from the front back to the plug in the back. All my blinkers and lights are hooked up and work. I just don’t have the last 2 wires. Is there a harness or do I have to tap the lines from the back of the control unit. Thanks
Greg V.
7/30/2020
All my my trailer connections are hardwired. So, if I run the Red wire from the brake controller to the back of the vehicle and hardwire splice it into the same line as the brake lights (connecting the vehicle and trailer plug), is this effectively the same as connecting it to the wire right behind the brake pedal? I'm getting blinking in my trailer lights when all brakes, running lights, and indicators are all enabled simultaneously. Can't figure out the problem!
Jon G.
8/10/2020
If you're having issues with your trailer lights then you'll want to take a look at the light circuits and make sure that they are all connected securely and that all of your grounds are installed on a clean, bare-metal surface. The brake controller will only send power to the trailer brakes. The only time that a brake controller can mess with the trailer lights is when there is a mis-wire or some corrosion somewhere that causes the brake controller signal to leap over to the other circuits.
Jim R.
6/3/2021
@JonG So, is he correct in running the Red wire from the brake controller to the back of the vehicle and hardwire splice it into the same line as the brake lights? I am in process of installing a 90160 Primus IQ and was going to run the wires this way also. Thx
Jon G.
6/4/2021
@JimR As long as the red wire is connected to a circuit that only gets hot when the brake pedal is pressed it's okay.
Trent
7/22/2020
With a constant 12v going from the positive terminal to the 7 pin connector, and the brake controller going to the positive terminal as well (via circuit breakers) my brake controller on my ram 2500 is lit up as it's registering a trailer connected. With those wires going straight to the positive shouldn't they be spliced in to a keyed-on positive wire?
Chris R.
7/23/2020
The brake controller, although wired directly to the battery, will eventually go into a sleep mode with the vehicle's ignition turned off. There's no need to wire it to a keyed power source.
Glenn W.
7/18/2020
I have a 16 ft jayco starcraft caravan with electric brakes.I have fitted a tekonsha primus iq brake controller to my tow vehicle.The controller is showing that there is a short in the wiring.On unplugging brake magnets the wiring is clear.Each magnet is measuring 3.4 ohms and testing from the tow plug the measurement is 1.7 ohm.The brakes are operating as they should be but I am getting the 5H flashing on the screen.How do I rectify this problem.
Chris R.
7/23/2020
The short may be coming from somewhere else. Inspect the 7-Way connectors, both on the tow vehicle and on the trailer, and look for any corrosion or debris built up inside the pins that needs to be cleaned out. This can sometimes lead to a short on the brake output circuit. With regards to the controller installation - was it completely hardwired or were you able to use a plug-in adapter harness?
Dan
7/16/2020
I have a 2000 chevy signal cab short bed. I have the Tekonsha Voyager brake control. Cannot get to work. With plug supplied by gm when truck was new.
Chris R.
7/17/2020
Can you tell me what specifically isn't working with the brake controller? Is it not powering on at all or is it not working to engage the trailer brakes?
John H.
8/11/2020
@Dan Check the two fuses by the studs in your underhood fuse box. You should have a fuse next to each stud and there should be ring terminals with wires coming off. One goes to your brake controller plug in the cab and one goes to your 7-way connector at the back of the truck. I believe the stud closest to the positive battery terminal is for the brake controller plug.
Ace
7/8/2020
One question: WHY do you have a live wire (from B+) going directly to the trailer brakes, while the brake controller is supplying the brakes with current, and the lights have a separate system? We have a simple resistance-based brake controller and old-fashioned hydroelectric brakes on the trailer. The only way to make the whole system work in our case is to ground that wire to the firewall/frame! The ONLY power supply to the trailer brakes is via BLUE wire from the controller! Now everything works!
Chris R.
7/13/2020
I'm not quite sure what you mean. There should only be one power wire going to each brake assembly - and that is the blue brake output wire that you mentioned. The 12V hot wire would connect to a trailer mounted battery bank to provide a maintenance charge during travel - it would not be tied to the trailer brake system.
Ace
7/13/2020
@ChrisR
Oooh, OK, gotcha! Guess I forgot how trailers are typically wired- our battery bank is powered by solar. Thanx for clarifying!
John H.
8/11/2020
@ChrisR There should be a wire going from the battery to the breakaway and then to the brake output wire. This would activate the brakes in a trailer breakaway situation.
Cody M.
6/29/2020
Working on a 2013 Ford F550 with a Utility bed and hoist. Im trying to install a new 7 way plug and it was all going well except I can't seem to find my brake wire. All of my wires tested negative so I have to run wires from the LED lights to the pickup end itself. I found my brake wire I believe but still no power from the original harness. How do I run a new brake wire from the brake switch? Thanks
Chris R.
7/2/2020
Are you referring to the factory trailer harness on your F-550? The brake and turn signal circuit should be sent along the same wire (trailer wiring is combined), so I would test the wires you already found for the turn signals and see if they also carry power with the brake lights illuminated.
Miguel
6/20/2020
Hi, I'm installing a Reese towpower 8508211 brake controller on a 2019 VW Jetta everything is pretty much done but the only problem I had when trying to connect the red wire to the brake switch there were no wires on the brake pedal so what I did, I tap in to one of the wires that runs to the brake tail lights that runs from front to back on the side of the door this wire only gets power when you press the brake pedal. On the brake co troller screen I get 2 dots and when I activated manually I get an N.C. on the screen I wounder if my installation is correct? Thank you
Chris R.
6/21/2020
Are you testing the controller with a trailer actually hooked up? The "N.C." means "no connection", so that would be a normal message if the trailer isn't plugged in.
Miguel
6/23/2020
@ChrisR
Looks like I got them to work I had both wires from the brakes connected to positive and no ground, so now I have one positive and one ground to each brake, both tires are locking up on the air but not when I'm driving the car at 25mph I can barely feel the trailer to engage the breaks all this with a max (10 & b1)at the brake controller do you think this problem has to do with any wiring issue or I need to break in my new pads in order to performed to the fullest. Thank you for your help
Chris R.
6/25/2020
@Miguel If you have new, self-adjusting brake assemblies they may indeed just need to be broken in a bit. Take the trailer up to an empty parking lot and just engage those brakes a bunch - each time you do this they'll essentially adjust a bit more until you have ideal braking.
Don J.
6/17/2020
Brake sense color and location for 2004 mercury mountaineer premier 4.6l v8 awd
Chris R.
6/21/2020
If your Mercury Mountaineer has the factory 7-Way connector at the bumper there should be a built-in brake controller port behind the dash with which you can use the Plug-In Adapter # 3035-P (if you have a Tekonsha or Draw-Tite controller). I wasn't able to track down info on an exact location, but typically these ports are to the left of the steering column, hidden a bit behind the dash. You might even check with a local Ford dealer to see if they have any information on this.
Charles B.
6/11/2020
I have a 2019 canyon, I bought a hopkins impulse controller. Can you help with the wiring please. I have to use it in 2 days, please advise
Chris R.
6/15/2020
Your Hopkins Impulse controller can be wired right into the factory harness under the dash. There isn't a plug, but all the needed wires are already present. They should be labeled by function. Coming from the Impulse the red wire will go to the brake input circuit, the black wire is for 12V power, the blue wire is for brake output (to the trailer), and the white wire is for ground.
Chris R.
6/5/2020
Based on my research it actually looks like your Armada should come equipped with a factory port for plugging in a brake controller (whether or not it has the tow package) - so you shouldn't need to look for the right brake switch wire for a hardwire install. For example if you're looking to install a Tekonsha controller like the Prodigy P2 # 90885, you would just need the Adapter Harness # 3050-P for a plug-and-play install. If you don't have the tow package you would add the 7-Way Kit # N40975.
Darby L.
6/5/2020
@ChrisR. Brak controller will not work with plug and play harness. That is why I am going to hard wire it.
Chris R.
6/9/2020
@DarbyL I see. I wish I could track down the right wire color for that circuit, but the best method will be to simply test the wiring behind the pedal to see which one only gets power when the brake pedal is depressed (and no power with any other function). This is where the red wire from the controller will connect.
Chade
5/16/2020
We have a 2019 Durango that does not have the towing package so I will need to wire directly, however I am unable to find the wire for the break sense (stoplight) switch. Do you happen to have the color and location of the wire? I have to assume it's in the wire panel just behind the ebrake pedal but I can't find any wire that is only hot when the break is depressed.
Chris R.
5/19/2020
I really wish I could track down the right wire color, however I wasn't able to find a diagram for your '19 Durango. On some vehicles finding the cold side of the brake light switch can be difficult- if you can't find a wire behind the brake pedal that only gets power with the brake pedal depressed, you might need to tap into the 3rd brake light or even use the Stop Light Switch Kit # RM-751449 for this signal.
Bill
5/14/2020
Does the connection from the brake light switch carry a ground or a positive 12volt to the controller. Would connection to the center mounted brake light on a ford transit work. How much currant does this connection draw as these are very light guage wires.
Chris R.
5/16/2020
If you're able to access the 3rd brake light and you find the circuit that only gets power when the brake pedal is depressed (and no power otherwise) then you can tap into that circuit for the controller's red wire. Sometimes this is necessary if there isn't an adequate wire to tap into behind the brake pedal. For 12V power (to actually power the controller) you'll need to connect directly to the battery in your Transit.
Trent
1/30/2020
Which color wire on my break pedal wires is the power to the brake. 2003 gmc Sonoma ext 3 door no tow package.
Jason S.
2/3/2020
I tried looking up your particular model for color. The closest vehicle I could find the color diagram for which I believe has the same wiring harness is the Chevy S10. On that model the wire color you'd be looking for is white.
To confirm this or to diagnose your vehicle's brake wire, you will want to use a circuit tester like # PTW2992 to test the wire for power. You should only see power when the brake pedal is pressed and no power on the wire when the brake pedal is not.
Helpful Links
Dave L.
1/28/2020
Thanks for the helpful article. Questions:1. The brake controller is wired directly to the battery in the diagram. I could postulate safety reasons for this i.e. not to lose brakes if the engine quits or needed to apply brakes with the truck off but Is it acceptable to wire to an accessory with appropriate relay switch position. Seems like you would have a good potential to drain the battery if you left the controller on with the vehicle off.2. You used circuit breakers in this application. Is there a reason that circuit breakers were used in lieu of cheaper / simpler fuses. Again I could postulate that maybe you would hope that the breaker would reset if the fault cleared and still retain brakes.....? But you would still lose the brakes for some period of time whether the breaker tripped or the fuse blew...….
Jacob H.
2/4/2020
If the break controller is operating properly, it would take a very long time for it to have any affect on the battery. Using a breaker is so that instead of having to replace the fuse when ever it blows, the breaker will trip and reset. You shouldn't have any issues with fuses or breakers if everything is wired correctly. If the breaker is not resetting then it will need to be replaced just like a blown fuse.
Sorin N.
8/8/2020
@JacobH @DaveL
I had the same question as above. I am especially worried about the "hot lead" that will be permanently tied to the trailer connector and the trailer (when towing).
So when we stop somewhere temporarely, we absolutely need to disconnect the trailer, to avoid a battery drain, even if we don't un-hitch?
Jon G.
8/17/2020
If you are stopping for a short period (like at a gas station) you'll be just fine, but if your stop will be longer like overnight then you'll want to either disconnect the trailer connector or install a battery isolation solenoid # 277-000096 which disconnects that 12V power when your ignition is turned to off.
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The Prodigy P3 trailer brake controller uses a 4-wire hookup. The white wire is to be grounded to the battery negative terminal; the black power wire connects to the battery hot terminal through a circuit breaker; the red wire takes in the brake…
view full answer...A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…
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view full answer...On this page (typically below the product links) there is a helpful link section that will have the install instructions fo the Hopkins Breakaway kit part #20400 that you referenced. I also attached an install video that shows the kit installed as…
view full answer...That's a good question, and in order to use the Curt Echo Mobile Trailer Brake Controller #C51180, it requires simply the 12 volt, ground, and turn signals be connected to the 7-way on your truck. So you will need the 12 volt connected…
view full answer...If you have a vehicle specific wiring harness for a brake controller then that would indicate that you have a factory tow package and subsequently would already have a 7-way at the back of your vehicle. The universal 7-way connector #ETBC7 is meant…
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view full answer...All the brake controller needs to sense a trailer connection so that you can test it is a slight amperage draw on the output circuit. For that you can use a circuit tester like the part #PTW2993 with one pin grounded and the other on the output…
view full answer...Actually, the P3 now has the upgraded axis accelerometer like the P2. The Tekonsha P3 Trailer Brake Controller #90195, will work with both electric over hydraulic brakes on the trailer as well as electric brakes. It has a menu option on the display…
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Evan
3/10/2024
I have an 88 gmt400. I also have a tekonsha brake controller from an 04 truck. How do I wire that controller to a truck that doesn’t have a factory plug?