T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
(228 reviews)
Price: $44.13
In Stock
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Item # 118325
Retail:$74.63
Our Price: $44.13
You Save: 41%
Will this fit?
To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
In Stock
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
Need help with installation?
Locate installers near me- All Info
- Reviews (228)
- Q & A (0)
- Photos
Tekonsha Custom Fit Vehicle Wiring - 118325
- Custom Fit
- Trailer Hitch Wiring
- 4 Flat
- Converter
- Tekonsha
Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required. Includes tail light converter.
Features:
- Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
- Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
- Connects quickly and easily - no cutting or splicing of wires
- Locate connection points along frame rail
- Plug in T-connector
- Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
- Constructed of 16-gauge bonded wire
- Comes with dust cap for 4-way flat connector
Specs:
- Maximum amperage:
- Stop/turn lights: 2.1 amps per circuit
- Tail lights: 4 amps per circuit
- 1-Year limited warranty
Installation
This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located beneath your vehicle, along the driver's-side frame rail.
Once installation is complete, the 4-way flat connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.
It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.
Tail Light Converter
A tail light converter is built into this T-One connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of your trailer. The tail light converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.
118325 Tow Ready T-1 T-Connector - 4 Wire
Installation Details
This Product Fits The Following Vehicles
- 1994 - 2008 Mazda B Series Pickup
- 1994 - 2008 Mazda B Series Pickup
- 1998 - 2001 Mazda B Series Pickup without factory tow package
- 1993 - 1999 Ford Ranger
- 1993 - 1997 Ford Ranger
- 1998 - 1999 Ford Ranger without factory trailer connector
California residents: click here
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
- Wrong item was ordered
- Did not arrive in time
Customer Reviews
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118325
Average Customer Rating: 4.8 out of 5 stars (228 Customer Reviews)
Quickly and easily install a 4-way trailer connector on your vehicle with this custom wiring harness. T-One connector plugs directly into existing wiring - no cutting, splicing or tapping required. Includes tail light converter.by: 08/12/2023
Wiring is NOT conventional..
None of the harness wires matched up to the flat 4 wiring.
Red was yellow green was brown etc.
And wiring or color ceding was included with the 7 pin harness
by: Frank 02/03/2024
Great communication with sales. Any problems are handled quickly and professionally. Shipping is quick.
by: B.gump11/02/2019
One year ago I bought this wiring harness for my 1999 Ford Ranger XLT after trying to repair and fix the pigtails that the previous owner of my vehicle installed. After installing this system, I noticed an immediate benefit of having it plug into the existing factory wiring harness for the lights everything works phenomenal and perfectly every single day that I hook up my trailer. In the year that I've had it I have not had to troubleshoot lighting issues especially with your running lights on no issues whatsoever everything runs perfect! don't be like me and buy a bunch of other stuff like additional pigtails trying to fix what someone else has done just buy this system it's worth the money and go for it! I was so confident in this system that I just installed wiring and a hitch on a 2018 Ford Transit t250 and that system is phenomenal too!
by: Brad.G10/01/2020
1999 Ford Ranger
So to start, I bought this 3 years ago & installed it on my 99 ford ranger after giving up on the pigtails that were previously used as trailer lights. So, the system is designed to either run normal or just stop in the case that something goes haywire in the module. This is what happened in the old system module. Therefore I bought a new one & my trailer lights are running like new again! I figure since I'm pulling a trailer 8 months a year, spending ~$40 every 3 years is not a bad deal. It's easy enough to install, lowet your spare tire. Locate the factory wire harness (usually up behind hitch & behind the bumper) disconnect lights, insert the module with addition of silicone paste, snap together, put it back in general area, route your wire & raise your spare tire. 15 mins max. & done! Super easy!
by: Aaron 07/26/2023
Seems to be a good product. Attached plugs as described and fits great. Tested all lights on the truck and plugged into 3 different trailers. Everything works like it should.
by: Colin 05/30/2021
Small, well-built wiring harness is just what I need for my vehicle, and customized to fit it, so no guesswork or trying different combinations needed.
Colin
5/31/2022
Its been holding up, but I have not connected it in nearly a year. I will try to do so later this week, because I am finally moving the trailer after upgrading it.
by: Tom N.05/27/2014
1996 Ford Ranger
I installed this on a 1996 Ranger. I removed the rearmost bumper mounting bolt on each side and then loosened the other two. This allowed the bumper to drop down far enough to easily access the wiring. At that point you unplug the factor harness and plug in the trailer wiring. I drilled one hole behind the license plate to hold the wiring harness in place and the installation was complete.
Tom N.
5/28/2015
No problems. Easy installation.
by: T for Texas06/22/2017
1996 Ford Ranger
Plug and play. Can't beat it. I bought one of these for my 92 Ford Ranger and one for my 96 Ford Ranger. 2 different part numbers. Simple as unplugging the harness where the bed attaches to the frame at the rear and plug this in between the two plug halves. EZ-PZ. I have used etrailer before and i will use them again if i need to.
by: L King07/06/2019
We bought aTekonsha custom fit vehicle wiring for wiring up the trailer and it was perfect. Wiring a trailer has never been so easy, we made a great choice. etrailer is very good to work with and they deliver fast. I wouldn't hesitate to use them again.
L K.
7/7/2020
Good as when we first put it on. Never a problem with it, very happy
by: Ray F.09/02/2016
Mazda B2300-Series-Pickup
Product arrived on-time and thanks to the helpful instructions, I was able to install this wiring harness in a matter of minutes. My son is out using the truck w/trailer to mow lawns or I would take a picture of the installed harness. I am very satisfied with the product.
Ray F.
9/2/2017
After one year, and many trailer tows, the harness is still working perfectly.
by: Scott 11/29/2015
1994 Ford Ranger
Product was as described. It plugged right into the original harness everything thing is great. I went cheap on shipping and still had the harness in 4 days. I will not go anywhere else for trailer parts. Awesome job
Scott
11/29/2016
It still works just like it did when I installed it.
by: Dan02/26/2019
1997 Ford Ranger
I was able to install the part that I bought on my truck, but I didn't realize that the 4-pole flat output doesn't have a wire for a brake light, and I need a wire for a brake light. Do you have any suggestions for a supplementary/replacement part that I could buy from you guys that would include a wire for a brake light? I have a 1997 Ford Ranger, and the T portion of the product that I bought works just fine - the only issue is that the brake light wire is lost somehow in the conversion.
Mike L.
2/27/2019
This wiring harness includes a taillight converter, which takes the brake lamp and turn signal signals and combines them onto one circuit. Many vehicles use whats called a separate taillight system, with separate bulbs for turn signals and brake lamps. Most trailers, however use the more simple combined system that carries both signals on the same circuit.
by: Jay06/25/2023
Worked just fine when I got it, but it seemed like a long time to get it 250 miles down the road from where I’m at.
by: Jeff08/17/2023
1994 Ford Ranger
Fast shipping excellent product, installed in five minutes!
by: phillip09/12/2015
1993 Ford Ranger
the product was as described, fit well no problems, needs a better way to attach connector to bumper. still plug and play.
Phillip
9/14/2016
still satisfied with the product, no problems.
by: Brent W12/17/2020
The wiring harness was easily installed and has functioned perfectly for a year now.
Brent W.
12/18/2021
Moved the harness to a second Ranger and it still works as well as the first day I used it!
by: Randall07/15/2017
1994 Ford Ranger
Awesome hitch wiring for my ford ranger. I only had to unplug current wiring and plug in this adaptor and that was all. I would like to let everyone know that if your ford ranger (mine is 1994) needs wiring harness for a hitch this is the exact fit and is still working 1 year later.
by: Jim R.05/25/2015
1999 Ford Ranger
Couldn't be happier with the wiring harness. It plugged directly into the wiring harness on the truck and had enough length to route it along the frame and secure it with wire ties in several places. The converter came with self-stick adhesive which made mounting a breeze, although I also secured it with a small bolt through the mounting hole on the converter. During the installation, I used 1/2 inch plastic ribbed wire conduit to protect the wiring harness from chaffing, although it is not necessary. I installed it on a 1999 Ford Ranger, which has separate turn signal lamps from the tail/brake lamps. If you have a similar vehicle, I highly recommend this product. Also shipping was extremely fast.
by: Rayday05/31/2015
1999 Ford Ranger
The etrailer was a great experience and I got exactly what I wanted thanks again etrailer
Rayday
5/31/2016
Excellent. No problems at all
by: ODJ06/17/2016
1994 Ford Ranger
Great product thus far. The installation was simple (the connector is right above the back of the bumper), and between the supplied zip tie and the adhesive backing on the plastic box, it was easy to mount securely to the back of the bumper mount structure. Now I just need to figure out how to securely and cleanly hide away the wiring while it's not in use.
The whole experience with etrailer has been great so far, btw. Everything I ordered shipped in sturdy boxes, was well packaged, and shipped quickly.
by: Michael B.07/28/2014
2010 Ford Ranger
I ordered a trailer wiring harness for my Ford Ranger. It arrived several days earlier than scheduled, which is always appreciated! Installation was very easy, took only about 10 minutes. It plugged right into the factory wiring harness. A quick check with the voltmeter to verify everything works, which it does, and I'm ready to tow! Thanks e-trailer!
by: John W.09/04/2017
1993 Ford Ranger
This product fit the factory wiring harness as advertised. Made adding the trailer wiring connection very simple without creating new problems in the vehicles wiring harness. I would buy this product again if I needed to add trailer wiring to another vehicle.
by: Jon02/07/2013
I'll tell ya what, this made wiring for my trailer a no-brainer. I found the connection on the rear underside of my truck, separated, and inserted the wiring harness, and i was off and running! (just had to make sure everything was secure).
thanks guys, custom harness makes this easy for someone who is not so truck or wire savvy.
by: Jerry begley05/20/2019
1997 Ford Ranger
Correct product, fast and reasonable shipping. Installed in 10 minutes. Can’t ask for much more than that. Thank you!!!
Jerry B.
5/21/2020
No problems, still working
by: Ben G.02/12/2012
1994 Mazda B Series Pickup
Bought the T-One connector and the 4 pole to 7 pole connector. Regular Shipping service was ok, alittle slow, but not etrailer.com's fault.
Installed them in about 5 minutes and they work perfect together. Going hunting in a week with my "new" used pop up trailer, lights and everything work great!
25
228
Show More Reviews
See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring
- Trailer Right Turn Signal Does Not Work When Connected to 3 Different VehiclesIt certainly does sound like a short on the trailer that caused some problems, but I would not rule out the possibility that it is just coincidence and that there is an issue with all the vehicles in some way, shape, or form. If the trailer draws more that 2.1 amps per side for turn/brake lights then that would cause the converter to blow. On the trailer, make sure its connector is free of corrosion. Then you will want to trace the wiring leading back from the 4-Way to determine if there...
view full answer... - Custom Fit Class 2 Hitch for a 2008 Mazda B2300 I have a custom hitch for your Mazda B2300 truck but the Curt Trailer Hitch Receiver item # C12923 will not fit. The bolt hole spacing is off. Instead, you will want the Curt Trailer Hitch Receiver item # C12012. This hitch also has a 1-1/4" class II receiver. The Curt Hitch item # C12012 is custom fit and attaches to your Mazda with included hardware. It will not require drilling. This hitch has a 350 lbs tongue weight and a 3,500 lbs towing capacity. If you plan on doing any towing...
view full answer... - Trailer Has Turn Signals and Running Lights but No Brake Lights Towed by 1997 Ford RangerThis is strange because on a trailer, the blinker and brake lights share the same circuit. If you used a wiring harness like # 18002, on your 1997 Ford Ranger, that could explain the problem. This harness does not have a converter box included that converts the signal down to the 2 wire signal used by the trailer. You will need to install Tow Ready Custom Fit Vehicle Wiring, # 118325. I have included a link to the installation instructions for you to view. If you are using this type...
view full answer... - Recommended Brake Controller for 1999 Ford Ranger Towing a Tandem Axle Car HaulerI would recommend a proportional-type brake controller for the smoothest and most reliable braking. The Tekonsha Prodigy P2, part # 90885 is very easy to use and is our best selling brake controller. To install the controller, you will need a 4-pole trailer connector if you do not already have one. If your Ranger has the factory Tow Package, use part # 118241 or part # 118325 for no tow package. You will then need our Brake Controller Install Kit, part # ETBC7. The kit contains everything...
view full answer... - How to Wire a Towed Vehicle With Seperate Turn and Brake Cicuits on Towing VehicleIf the vehicle you are towing with has separate stop and turn signals then it will need to be wired with a Modulite converter so that it can run the lights on the vehicle you are towing that does not have separate turn signals and stop lights. If the vehicle you are towing with is already setup to tow a trailer then the Modulite converter is most likely already installed. If you are towing with the 1994 Ford Ranger mentioned above then you will need to wire it with a 4-way connector that...
view full answer... - Are Trailer Turn Signals Working Opposite of 1997 Ford Ranger Turn Signals with Brake Pressed NormalThere is nothing wrong with the installation of the T-One Vehicle Wiring Harness # 118325 on your 1997 Ford Ranger. Your trailer lights working opposite of your Ranger turn signals when you press the brake pedal is actually pretty common.
view full answer... - Troubleshooting Wire Harness Short Circuit on a T-One Trailer Wiring Harness with ConverterIt sounds like the converter on the T-One Wiring Harness, item # 118325, is shorted. There are many reasons which could cause the converter to go bad. Most often connecting to a trailer that has a short in the wiring is the cause. The only solution in this case is to replace the wiring harness and then making sure the wiring on any trailer you may be towing is correct.
view full answer... - Why Would a Trailer Wiring Harness Not Have Power at the ConnectorIf you have a # 118325 installed on your Ford Ranger and it does not have power ran to it then your truck's taillights would also not be working. That would typically indicate a blown fuse under the hood of the truck. If you have a different style of trailer wiring harness most likely you have a blown trailer wiring fuse. I attached a help article on troubleshooting trailer wiring harnesses for you to check out as well.
view full answer... - Differences in Tow Ready and Hopkins Wiring Harnesses for Mazda B Series PickupThe main difference between the Tow Ready # 118325 and the Hopkins # 40215 wiring harnesses is that the Hopkins # 40215 requires the harness to be grounded to the vehicle with the included self-tapping screw. The wiring harness needs to be grounded at a location where the sheet metal is doubled. I recommend the Tow Ready T-One Vehicle Wiring Harness # 118325. This harness will have a much simpler installation since there it is a true plug-and-play wiring harness. Since the ground wire...
view full answer... - Troubleshooting Broken Ground Pin on Trailer Wiring Harness for a 1994 Ford RangerThe only wiring harness we carry for the 1994 Ford Ranger is the T-One Vehicle Wiring Harness, # 118325, that you have referenced. The black converter box does contain some electrical components that could potentially go bad. But if you are consistently having a trouble with the same wiring harness, it may be a symptom of another problem. You did mention the ground post breaking off. This could occur if there is corrosion build up in either connector, making it difficult to connect and...
view full answer... - Trailer Hitch and Wiring for a 1997 Ford RangerWe have several trailer hitches for your 1997 Ford Ranger but # 75082 will fit.Please note it will not fit GT models. If you plan on doing some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and a storage bag. If the ball mount kit does not have the right rise or drop to tow the trailer...
view full answer... - Brake Lights Would Not Work with Trailer Wiring Plugged Into a 1996 Ford RangerThe correct trailer wiring harness for a 1996 Ford Ranger is # 118325 (does not fit GT models). If this is the harness, you are using use a circuit tester like # PTW2993 to test the wires going into the converter. If the signals on the wires are correct going into the box but they are not correct coming out to the 4-Way, then something is wrong inside the converter, and it will need to be replaced. If all of the other lights are working, then you could have a bad ground on the trailer...
view full answer... - Parts Needed to Tow Small Trailer with 1994 Ford RangerThe best solution for towing a trailer with a 1994 Ford Ranger affordably will be with the Draw Tite hitch part # 75082 which is a custom fit hitch that is priced great, using the part # D-4 that you referenced as a ball mount, the Hitch Pin and Clip, # PC3, with either the # 63845 for a 2 inch ball or # 19260 for a 1-7/8 inch ball, and then for trailer wiring the very affordable Tekonsha kit part # 118325 and you'd be set. This is a very basic and simple setup that will work great and...
view full answer... - Troubleshooting a Shorted Out T-One Vehicle Wiring Harness # 118325 on a 1996 Ford RangerIt sounds like the # 118325 might be bad since you checked the voltage before the unit and there was power but after there is not. However, since this is the second one of these you have gone through it sounds like you might have a short somewhere on the trailer that is causing the # 118325 to short out and quit working. I would recommend you go over your trailer wiring and check for any bad grounds, loose wires or corrosion and fix as necessary. I attached installation instructions...
view full answer... - Tail Lights and/or Brake Lights On and Use Turn Signal One side Brightens-Other Side Light Goes DimIt sounds like you have one of two problems. Either the wiring on the 1995 Ford Ranger is not converted as it should be to allow the brake and turn signals to work on the same circuit correctly, or there is a ground issue on the trailer that is showing up when the brakes and turn signals are applied at the same time. If your trailer wiring does not have an inline converter, like the black box on the # 118325 T-One Harness, then you will need to purchase one and install it. The #118325...
view full answer... - 1997 Ford Ranger Hitch, Wiring, and Brake Controller Recommendation for Towing a Small TrailerI'd be happy to help you out! The trailer hitch I recommend for your 1997 Ford Ranger is the Draw-Tite Max-Frame Trailer Hitch Receiver # 75082 because it sits nice and snug up against the bumper for a clean looking aesthetic. To add a brake controller to your Ranger you need the T-One Wiring # 118325 for basic trailer lights, the Universal Wiring Kit # ETBC7 for a fully-functioning 7-Way and the wiring you need for a controller, and then last of all the brake controller. For a brake...
view full answer... - Will Curt Trailer Hitch # 13138 Fit a 1997 Ford Ranger Flareside (Stepside)Curt trailer hitch # 13138 will fit all models of the 1997 Ford Ranger except the GT models. So it will fit your stepside model as long as it is not a GT. I have linked the instructions and a video showing a typical installation for you. If you plan on doing some towing I recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts, 2 balls, a hitch pin and clip, and a storage bag. For trailer wiring use # 118325.
view full answer... - Tailgate Light Bar Recommendation for a 2008 Mazda B4000 4x4We do! I recommend checking out the Rampage SuperBrite LED Tailgate Light Bar # RA960135 for your 2008 Mazda B4000 4x4 pickup. This carries the basic stop, turn, tail lighting and is powered by your 4-Way flat connector. If you don't already have a 4-Way flat on your Mazda you'll also need the T-One Wiring # 118325 which tees into your OEM wiring connector and runs the wiring through a converter to protect the factory wiring on your vehicle. Attached are some videos for you to check out.
view full answer... - Hitch Recommendation for a 1998 Ford RangerFor a trailer hitch for your 1998 Ford Ranger you would want the Curt Hitch part # 13138 as it is a Class III hitch confirmed to fit your vehicle that is the most popular with our customers. This is a round tube hitch with plenty of capacity that would work well for you. I attached an install video for you to check out as well. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop...
view full answer... - Blown Trailer Light Relay on a 1993 Ford RangerI am a little confused by what you mean. If the factory relay located in the fuse box on your 1993 Ford Ranger has burnt up when the trailer wiring was connected then you have a short in one of the circuits. In order to fix this you would need to trace each wire back as far as possible while checking for breaks in the wire and repairing as needed. If you are referring to the converter box that attaches in between the trailer connector and port on the vehicle then the solution is the same...
view full answer... - Diagnosing Faulty Trailer Wiring Harness on a 1993 Ford Ranger The issue you described sounds like a bad ground but could also be attributed to a faulty converter box or corrosion. I would first check the grounds. The best way to do this would be to remove each of them on both the trailer connectors and the lighting assemblies. I recommend sanding down the surface with some sandpaper and then attaching with new hardware. If the issue still persists once the grounds have been checked then it would also be worthwhile to look inside the trailer connectors...
view full answer... - Trailer Wiring Harness Recommendation and Functions for a 1993 Ford RangerOn a vehicle that has turn signals that are separate from the brake lights, a converter, # 118325 in this case, is required. The converter takes the separate signals on the vehicle and combines them to turn/brake lights on the same circuit which is what trailers use. Your trailer has what is called a wishbone harness. Normally, yellow is the driver side and green is the passenger side. When there is 2 brown wires this means that the running light signal is split at the connector so you...
view full answer... - Parts Needed to Install Trailer Brake Controller on 2003 Mazda B3000We do have everything you need to install a trailer brake controller on your 2003 Mazda B3000, however this truck does not feature a factory brake controller port. Starting with the brake controller itself, I highly recommend the Tekonsha Prodigy P3 # 90195. This is an excellent, proportional controller that will activate the trailer brakes at the same time and with the same intensity that you apply to them in your truck. It features an easy to read digital display and continuous diagnostics...
view full answer... - Recommended Hitch for 1999 Ford Ranger XLT SupercabThere are several available hitches for your 1999 Ford Ranger. I would not recommend the 1-1/4" Class II Curt hitch, which leaves three other available options. There are two different Curt Class III hitches, the # 13019 as well as the Curt Round Tube # 13138 hitch. The third option is the Draw-Tite # 75082 Max Frame Receiver Hitch. I recommend the Draw-Tite # 75082 over the others. The hitch is less visible with a concealed cross tube which gives it a better look when installed on your...
view full answer...
Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
Expert Research:
Mike L
Expert Research:
Robert G
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
John H
Expert Research:
Adam R
Video by:
Joshua S
Test Fit:
Nicholas E
Updated by:
Laura H
Updated by:
Wilson B
Updated by:
Alexander C
Updated by:
Isabelle B
Installed by:
Cole B
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Product Experts Available Now!
Call 1-800-940-8924
Katrina D.
8/25/2023
I do see that this harness is showing that it is not a confirmed fit for the 2017 Jeep Cherokee.