Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 4-Pole Flat Connectors
(767 reviews)
Price: $89.89
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Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 4-Pole Flat Connectors
Item # RM-154
Retail:$143.99
Our Price: $89.89
You Save: 38%
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- Reviews (767)
- Q & A (0)
- Photos
2021 Ford Ranger - Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 4-Pole Flat Connectors
- Diode Kit
- Splices into Vehicle Wiring
- Tail Light Mount
- Universal
- Roadmaster
This wiring kit carries your RV's brake and turn signals to your towed car's tail lights. Diodes prevent electrical feedback. Towed car's tail lights will operate as a combined lighting system. 4-Pole wiring harness included.
Features:
- Carries your RV's tail, brake, and turn signals to your towed car
- Wires towed car as combined lighting system
- Prevents feedback that can damage your vehicle's electrical components with diodes
- Includes:
- 4 Hy-Power diodes
- (2) 4-wire harnesses with 4-pole flat connectors
- Wire connectors, zip ties, and plastic loom
- 1 Ring terminal
Specs:
- Max amperage: 85 amps
- Max voltage: 24 volts
- Power cord: 6' long
- 4-Wire harness: 30' long
- Plastic loom: 3' long
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Notes:
"Don't be intimidated by diodes: if you can strip and crimp wire, this installation will be no problem."
Combined Lighting System vs Separate Lighting System
A combined lighting system uses the same light bulb to signal both braking and turning. (In other words, the car signals a turn by flashing the brake light.)
A separate lighting system has the brake signal and the turn signal light up independently of each other. Typically the turn signal is amber.
To keep the separate lighting system on your car functioning properly while you're flat towing, add a wiring converter (118158 sold separately) and 2 additional diodes.
Do I Need a Brake Light Relay?
If your towed car's brake lights illuminate when you press the brake pedal with the engine off, you need to install a brake light relay (RM-88400 - sold separately) with this kit. Without a relay, your car's brake signal will override the turn signal sent by the RV when you are slowing down to make a turn, creating a potentially dangerous situation. Other drivers will see that you're slowing down, but not that you're making a turn. With a brake light relay, you can signal both and travel safely.
Wiring Diagrams for Roadmaster Diode Kit
154 Roadmaster Universal Wiring Kit with 4 Hy-Power Diodes
Compare to Tow Ready TR118821
Installation Details
Customer Satisfaction Score:
92% were satisfied with this product
8% of customers were not satisfied
- Wrong item was ordered
- Product did not meet expectations
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Customer Reviews
Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 4-Pole Flat Connectors - RM-154
Average Customer Rating: 4.8 out of 5 stars (767 Customer Reviews)
This wiring kit carries your RV's brake and turn signals to your towed car's tail lights. Diodes prevent electrical feedback. Towed car's tail lights will operate as a combined lighting system. 4-Pole wiring harness included.by: Wes 02/10/2024
It does what it says on the tin. Easily lit up my XJ so I could tow it. Only regret is that by making the connections at the rear, you don’t get the front market lights on the toad. I should have connected the running lights diode in the harness under the dash so all the marker lights come on at night.
by: Larry02/10/2024
I’m always extremely satisfied with Roadmaster products. I had just bought a new truck and planned on towing it so I needed everything to get it ready to tow. This review also applies to to the other items I purchased.
by: Billy02/08/2024
I thought I order the 7 to 6 pin wiring harness for my vehicle as I have the 7/6 cord I used when I pulled my pickup. I also ordered the 6 pin mounting bracket with the 6 pin adapter that wires into the harness. I received the kit which is a flat 4 pin harness.
by: Gerald12/29/2023
2015 Subaru Forester
etrailer is a great company for towing products. They have fast delivery and they have nice installation videos. This order I added 2 more diodes to wire my 2015 Subaru Forester to have separate wiring for break, running, and turn signal lights.
by: Gregory H04/19/2024
First of all Justin B,was awesome so very helpful and knowledgeable went over everything with me and then double checked what was needed before I placed the order for my 2022 maverick to be flat towed, order only took 3days to get to Fl.Kudos to Justin B all the guys putting together the order
and etrailer awesome job,will definitely use them again for any of my needs.
by: Chuck B04/15/2024
Works perfectly and straightforward instructions made it easy to install.
by: Luis02/28/2024
This system worked perfectly from experience. They help from trailers e trailer agents was crucial for guiding me through the process.
by: David04/18/2024
2014 Chevrolet Equinox
It is exactly as advertised, not yet installed but looks pretty self explanatory
by: Howard 03/09/2024
THE EQUIPMENT IS FINE. THE INSTALLATION VIDEOS ARE SUPERB. MAKING PURCHASING THIS PRODUCT VERY WORTHWHILE.
by: Kenneth 12/07/2022
Items arrived right on schedule and in good order. I ordered three items in the last few weeks. Their CHAT agents were extremely helpful in answering all my questions about compatibility with my vehicle.
by: Penny02/14/2024
I have order several things from etrailer. Their products are great. Due to nobody's fault but my own I ordered some wrong things. The return was so easy, no questions asked. I would recommend this company to anybody.
by: Dennis01/27/2024
2017 Jeep Grand Cherokee
I’ve used several of these and they always work great.
etrailer videos are a great help!
by: Billy 06/03/2023
2015 Jeep Wrangler
Lori was spot on in making sure I got the correct base plate assembly and light package for my 2015 Jeep Wrangler Sport. Deliver was within the projected timeframe and installation when as per detailed instructions . Good job Team ETrailer, that is why I keep coming back
by: Gerald11/12/2023
Great tow plate , easy to install
by: Keith 04/05/2024
Fits and works just as it should.
by: Dean 05/17/2023
The install was more challenging than the tow bar itself but we got it done. Be patient with the tail light diodes they are tricky to fit but not impossible. I ended up using some 3m double sided adhesive sticky’s to hold the diodes in place while i pushed the tail light assembly back into position.
by: Steve03/13/2022
Installation instructions were great, no issues or questions. I ran the wire thru the frame, and used split wire loom and tape to protect wiring when outside the tube frame.
by: David10/26/2021
2001 Jeep Cherokee
This is the third time I have order base plates and electrical hook ups from etrailer and love this company. We have a 1979 MCI Bus conversion and it is difficult at time finding things for towing etc for it because of age. Not with etrailer, they have it all. We have towed a 96 S-19 chevy, a 98 Jeep was next and this year we got a 2001 Jeep Cherokee which we got the electrical kit for from etrailer.com and the base plates are still on the way. Everything fits nicely and if you are unsure of how it all goes together just watch their video''s on the etrailer website which are very informational.
Thank You etrailer.com for being there when we need you. See you all down the road....
David
10/28/2022
Still working very well and didnt even have to pull the bumper off to install it. very strong units. the electrical hookups worked well also and easy to hookup as well. Lights all work well. The brake cable system I had on my previous Jeep I mover to the cherokee but was a real pain to find a good pass through because of all the mechanicals in the Jeep cherokee but good it through finally.
by: Richard07/25/2022
2019 Chevrolet Blazer
Product is very well built and is hidden within the bumper/grille. Installation wasn't too difficult, reinstallation of front bumper requires 2 people.
Pleased with end results.
by: Frank03/27/2022
Jeep
This was my choice for my flat tow set up on a 2018 Jeep GC. I did this install myself. it was not difficult.
Frank
4/9/2023
One year in and the wiring set up has worked as planned. no issues.
by: Donald05/26/2023
We tow a 2022 Ford Escape behind our Winnebago motorhome. This wiring kit did the job for us. Everything working great!
by: Doug 08/11/2023
Toyota Land Cruiser
I used this on a 1988 Toyota Land Cruiser, so I could flat tow it behind an Motorhome. Easy to install!
by: Steven 08/21/2023
Jeep
Straightforward install on my Jeep Gladiator and no issues.
by: Darrin03/03/2024
Easy install
by: Woodruff03/28/2024
The stuff not here
25
767
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See what our Experts say about this Roadmaster Tow Bar Wiring
- Will the 4-Way Mounting Bracket # 18144 Secure the 4-Way of the # RM-154The 4-way mounting bracket # 18144 will be a little bit big for the 4-way of the RM-154, but I can assure it will secure the 4-way once you press the cap onto the 4-way. Either the cap will keep it in place or the fact that it is plugged into your tow vehicle will keep the 4-way in the bracket. If the hole underneath the light assembly is not large enough to fit the wires of the # RM-154 through you can either look for a different access point or enlarge that hole with a drill or dremel.
view full answer... - Tow Bar Lighting Recommendation for 2015 Titanium Ford EdgeI checked with Roadmaster and the diode kit part # RM-154 has been confirmed as a fit for your 2015 Ford Edge without any LED light exclusions so I would recommend it for you. I attached an install video link that shows this light kit being installed in a 2015 Ford Edge just like yours.
view full answer... - Running Light Function of 2004 Chevy Trailblazer When Flat Towed Using Roadmaster # RM-154The Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 is designed to allow your 2002 Dutch Star Motorhome to power all the lighting of your 2004 Chevy Trailblazer when being flat towed. You should not have the running lights of your Trailblazer turned on independently of the running lights of your motorhome when connected. That could cause the diode to fail but the kit is rated for a max voltage of 24V and max amperage of 85 amps, so it may function even under those conditions.
view full answer... - Options for Installing Diode Style Tow Bar Lighting on 2005 Volkswagen New BeetleThe easiest way to use diode tow bar wiring on a vehicle that has separate turn signals from stoplights is to wire the vehicle up like it's combined. This will operate the stoplights of the vehicle as if they are combined which will work well. You can still wire up the system to use separate turn signals but you need a total of 6 diodes and a converter box. If you check out the link I attached to this page under the "helpful information" heading you'll see the best ways to wire in diode...
view full answer...
- Tow Bar Lighting Recommendation for a 2015 Ford Edge TitaniumI checked with Roadmaster and they list the Diode kit part # RM-154 as a fit for your 2015 Ford Edge Titanium so it would fit and work well for you. I attached an install video that shows this tow bar lighting kit being installed on a 2015 Ford Edge for you to check out as well.
view full answer... - Wiring Guide for Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154Based on my research both your 2002 Bounder motorhome and your 2000 Dodge Durango have combined brake/turn lights. So in this case you will wire the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 as shown in the linked wiring diagram.
view full answer...
- Troubleshooting No Left Turn Signal or Running Lights on 2014 Jeep Grand Cherokee With RM-154If everything works but the running lights and turn signal after you installed the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 it sounds like you may just have a weak ground; this is often the cause of these types of issues so you'll want to make sure your grounds are securely attached to bare metal surfaces free of any paint, dirt or corrosion of any kind. Also check your wiring thoroughly to ensure there are none that are crimped, broken or otherwise damaged and your connections...
view full answer... - Will 2009 Chevrolet Silverado 1500 Use Same Tow Bar Wiring # RM-154 Shown in Video for 2013 ModelYes, the 2009 Chevrolet Silverado can also use the Roadmaster Universal Hy-Power Diode Wiring Kit, # RM-154, that was featured in our install video with the 2013 truck. I have attached a link to the video for you. Installation will be the same.
view full answer... - Where to Install Diodes for Flat Towing a 2013 Honda CR-VI have included a link to a video on the 4-diode kit # RM-154 being installed on a 2014 Honda CR-V that will help. All you will need is access to the wiring behind the tail lights of the vehicle as if you were going to change a bulb. Its actually probably easier on the CR-V than the Fit! Once you have access to the wiring behind the tail lights you will just test the wires to determine the functions and install the diodes and wiring accordingly.
view full answer... - How to Determine If My RV Has Separate or Combined Lighting for Installation of Roadmaster DiodesI do believe you're asking how to determine whether or not your RV has a combined or separate lighting system. If the motorhome’s trailer plug energizes the same pins on the 4 way connector for both brake lights and turn signals, then a 3-to-2 converter is already installed and the motorhome should be treated as combined lighting when installing the Roadmaster # RM-154.
view full answer...
- Does Roadmaster Universal Hy-Power Diode Wiring Kit Work With LED LightsYes, the LED lights on your truck will not affect the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154. You will be able to use this kit with those lights and it will work well. I have added a link to a video review below for you to take a look at also.
view full answer... - Does Diode Roadmaster Lighting Kit # RM-154 Also Light up the Side Clearance Lights of Tow VehicleWith the # RM-154 installed on your 2021 Jeep Wrangler the only lights that will function are the rear ones. If you have the rear ones working you're good.
view full answer... - How Does the Roadmaster Tow Bar Wiring Kit # RM-154 Install on a GMC JimmyThe three wires of the taillights of your 2005 GMC Jimmy are for, ground, low intensity (running light), and high intensity (blinker/stoplight). The colors of the wires aren't what you need to pay attention to. You need to test the wires for voltage when the brake lights are on, and then when the taillights are on. Once you have established the functions of each wire you will need to wire up the # RM-154 like the diagram I attached to the right shows. The yellow wire of the diagram represents...
view full answer...
- Wiring 2015 Ford Fusion For Dolly Towing Behind RVWhat you propose is indeed doable. You'd need the Roadmaster Hy Power Diode Wiring Kit, part # RM-154. If you click on the provided links, you can see an install video showing the kit being installed on a different Ford vehicle. The procedure for your Fusion would be similar. The product description page for the # RM-154 has install diagrams at the bottom of the page.
view full answer... - Are Resistors Needed to Install Roadmaster Hy-Power Diode Kit on 2019 Chevy Equinox Premier I checked with Roadmaster and for the Premier model of your 2019 Chevy Equinox the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 will work perfectly without additional components like a resistor. The Premier option features LEDs inside the taillight housings that are directly compatible with the Diode Kit.
view full answer... - Can Vehicle with Separate Turn Signals from Stoplights Get Tow Bar Wired as CombinedYes, you can use a combined style diode wiring kit like the Roadmaster # RM-154 on a vehicle that has separate taillights like the 2005 Ford Escape. Basically the stop lights of the vehicle will flash like a combined blinker and the amber turn signals won't get used at all.
view full answer... - Is a Converter Needed to Tow an Amber Turn Signal Vehicle Behind an RVA converter is not necessary. You can treat the Escort as though it does not have the amber turn signals. They will still function when you drive the Escort, but when you tow it behind the RV the system is simplified to the RV 4 Wire system. There are wiring diagrams towards the bottom of the tow bar wiring kits we have, like part # RM-154. Look for the image labeled Combined RV to Separate Towed Vehicle. I have added a link to a video of a tow bar wiring install on a 2006 Jeep Liberty...
view full answer... - Do Roadmaster Diode Wiring Kits Allow BackfeedingThe diodes of the Roadmaster diode kit part # RM-154 that you referenced only allow current to flow in one direction. You would not have to worry about back feeding.
view full answer... - What Parts are Needed to Flat Tow a Vehicle Behind a 2013 Fleetwood Bounder Class A Motor HomeThere are 5 items you will need to flat tow a vehicle: base plates for the vehicle, a tow bar that is compatible with the base plates, safety cables, lighting, and supplemental braking. But first, consult the owners manual of the vehicle you want to tow to determine if it can be flat towed and for any other specific information regarding recreational towing. The base plates are vehicle specific so I would need to know the year, make, and model to recommend the proper base plates. I have...
view full answer... - Installation Of Roadmaster Tow Bar Wiring For 2011 Ford FlexThe Roadmaster Tow Bar Wiring, part # RM-154, includes a 30-ft long 4-wire harness so it should reach the rear of your 2011 Ford Flex with no problem. I have attached a link to an installation video you can check out. When running the wiring you want to make sure you avoid any sharp edges or any areas that will become very hot and damage the wiring. The kit includes 3 ft of wire loom that can be used to protect the wiring when you run it beneath your Flex.
view full answer... - What Are Wire Color Functions of Roadmaster Diode Tow Bar Wiring Kit # RM-154Sorry to hear about that! We can confirm that the white wire on the 4-way wiring of the part # RM-154 is the ground circuit. The green is right turn/stop, yellow is left turn/stop, and brown is running light.
view full answer... - Will Both Blinker Bulbs Illuminate When Roadmaster Diode kit part # RM-154 is Installed on VehicleYes, if you install the Roadmaster Diode kit part # RM-154 on the circuit that carries the taillight signal to both taillight bulbs both of them will light up while the Blazer is being flat towed. I attached a diagram that shows how the wiring kit will wire to your vehicle.
view full answer...
- Testing Tail Light Wires on a 2013 Subaru Forester to Install Tow Bar Wiring Harness RM-154Roadmaster tow bar wiring harness # RM-154 is a universal type of harness that fits many vehicles. As such there are no vehicle specific installation instructions. You will need to use a circuit tester such as # 3808 to test the tail light wiring on your 2013 Subaru Forester to determine the functions. Then you can connect the harness accordingly. On the harness the white wire is ground, green is for right turn signal, red is for brake lights, yellow is for left turn signal, and brown...
view full answer... - Towed Vehicle Wiring Kit Recommend for Dolly Towing a 2015 Toyota RAV4You could likely install the Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 on your 2015 Toyota RAV4 since it's a universal wiring kit, but since your RAV4 isn't designed to be flat towed none of the flat tow parts makers have confirmed a wiring kit fit for your vehicle so you'll be stepping into "uncharted" territory for lack of a better term. I'm linking an installation video of this wiring on a 2013 Toyota Yaris for you to check out and use as a simple guide to get a feel for...
view full answer...
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Kenneth
12/8/2023
Diodes were not the ones I needed even though the etrailer site said they were. I had to purchase the correct ones from the auto electric shop where I had the wiring done.