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  1. Custom Fit Vehicle Wiring
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  4. 4 Flat
  5. Trailer Hitch Wiring
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T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 118715
Our Price: $80.97
You Save: 28%
Custom Fit Vehicle Wiring

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Tekonsha Custom Fit Custom Fit Vehicle Wiring - 118715
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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. Powered ModuLite reduces strain on wiring system. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118715 or order online at Free expert support on all Tekonsha products. Great prices and Fastest Shipping for T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (176)
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Tekonsha Custom Fit Vehicle Wiring - 118715

  • Custom Fit
  • 4 Flat
  • Trailer Hitch Wiring
  • Tekonsha
  • Powered Converter

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. Powered ModuLite reduces strain on wiring system.


  • 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
    • Locate connection points behind tail lights
    • Plug in T-connector
    • Connect hot lead to car battery
  • Includes ModuLite power module that connects directly to battery to avoid overloading vehicle's electrical system
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


  • Maximum amperage:
    • Stop/turn lights: 4.2 amps per circuit
    • Tail lights: 7.5 amps per circuit
  • 1-Year limited warranty


This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies and some interior paneling to access this harness. Once you've plugged in the connector, run the red hot lead up to your car battery. Connect the included fuse holder, and then connect the fuse holder to the positive terminal on your battery.

T-One Connection Location Points Behind Tail Lights

Once installation is complete, the 4-way connector will be stowed in your rear cargo area.

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.

ModuLite Powered Tail Light Converter

A ModuLite power module is built into this T-One connector. With a ModuLite, your trailer's lights will be powered without overloading your vehicle's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.

118715 Tekonsha T-1 T-Connector - 4 Wire - Modu-Lite Converter Included

Installation Details 118715 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118715

Average Customer Rating:  4.9 out of 5 stars   (176 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. Powered ModuLite reduces strain on wiring system.

2017 Ford Escape

this kit was a perfect fit for my car. The only fuss factor is running the power wire all the way to the battery at the front of the car. Once that's done it was good to go.

2017 Ford Escape

Kit was complete and easy to install. With this kit I did not have to splice any wiring which made the install quick & easy. Instructions were right on. These kits are a must on any late model vehicle.




2017 Ford Escape

Installed trailer hitch and wiring harness on a 2017 Ford Escape with some minor issues. The trailer packaging on delivery was a little lean and the corners had the paint scraped off. I called in to etrailer and they agreed to credit me the cost of a can of paint which I would need anyway. This happened within minutes of my call!

I install it myself with no help and without jacking up my car! Installed one rear side 1st (passenger side) and then the two bolts on the driver side and then back to the front bolts on the passenger side. Two issue I had with the install:
1. The trailer was about 0.5" too narrow so I tapped with a mallet and expanded enough to install
2. One wire guide for the bolts broke on the last bolt. It would be a good idea to provide some extra wire with the install kit! I have to fish out the bolt and washer and create a replacement wire. I used bracelet type wire for this. Also an auto flexible magnet tool from an auto parts store with used for this purpose of fishing out the bolt and washer.
Beside these two issues the hitch install without other problems and I did this alone. Also install a wiring harness and your provided videos on the wire harness and hitch were the best I have seen for an installation guide. I did buy and use black paint and black silicone sealant as per your videos.

2017 Ford Escape

Fairly easy to install and fits well in all the locations. I followed on the video which makes things very easy to do. My two issues are that the double sided tape did not work (even though I cleaned all surfaces with alcohol) and the installer in the video uses parts not included in the kit.


Great service and shipping times. Great company to order from. The product was a perfect fit.



1 year later and its still awesome! Great job guys.


I purchased the Class III hitch and harness for my 2017 Ford Escape. First thing I noticed was the quality of the product. I love supporting American businesses that take pride in their product. I watched the online installation videos that were very helpful. I installed the hitch and harness without issue. You will need an extra set of hands though, installation is a bit awkward for one person.

2017 Ford Escape

Pretty easy to install. I wasn't paying attention and hooked up the tail light wires backwards and mounted lights back on so that's my fault.

Etrailer's install video is much better than the included manufacturer instructions.

Hardest part was running power wire to battery but wasn't too bad. Just be forewarned you'll need something like a coat hanger to run battery wire thru engine bay.


Easy to install and it worked flawlessly! I love the instructional videos, they are so helpful!!


Excellent product. Shipped fast. Easy to install if you follow the online video! Routed the 4 pin connector down to the hitch instead of out the back!


Works PERFECT! Only thing I changed was for the 12V vice running a direct from the battery I was able to tap into the rear fuse box (google it) and that made it much easier.

2018 Ford Escape

My new Draw Tite hitch fit perfectly, you really need four hands when installing.. it would be a much easier install if yo have access to a car lift as it is a tight fit.. The wiring and installation of hitch went exactly as videos showed.. I wanted to protect back of vehicle in parking lots and that was one of the reasons for putting hitch on this car. Pictures attached. Thank you for your service


It was easy to install because I followed the video on YouTube and read the paper directions. It fit well and seems well made


Excellent and rapidly delivered!

2017 Ford Escape

Installation involves removing both taillight assemblies and running wires back under the trim panels. When done, the trailer wire connector is inside the cargo area of the Escape so to hook a trailer up involves running the wiring harness out through the back hatch of the Escape. It would be much better if the installation resulted in being able to mount the wiring connector to the trailer hitch rather than running the wires out of the cargo area. The wiring does work properly and we've had no issues.

Etrailer Expert

Mike L.


The manufacturer specifically designed the harness so the connector would be deployed from the interior of the vehicle when needed. This way, the connector is protected from damage when its not being used. The rear hatch of your Escape has weatherstipping thats thick enough that the wire for the trailer connector wont be damaged as long as you avoid the latch area.


This is my 3rd or 4th purchase with etrailer!! It seems like if they carry a product, they offer the lowest price you can find on it, & that’s a big reason I’m a repeat customer. Also everything is always in my shipment & if written instructions aren’t the easiest, they will link a video in an e-Mail. Everything that helps tow anything with my vehicle came from etrailer & when I needed tire chains, I saved over $50 on same exact brand set at my local Les Schwab.
Wiring of the vechicle in this particular purchase can be difficult due to tight spaces to get wire thru, but instructions were on point.



Like a champ!!


Installation was quick and easy.

2017 Ford Escape

This is my third installation of these harnesses (on different vehicle types). The harness is exactly as described, plug and play. The tail light harness connection on my 2017 Escape was slightly different from the video, requiring a little adaptation. The written instructions are very superficial, so I thank etrailer for the very complete video. Once installed, it all works perfectly.



I have traveled many miles towing a sailplane trailer, with never a problem. All the wiring is well protected and terminals are good quality, so I do not anticipate any problems.

2018 Ford Escape

To date the unit has had minimal use but has performed as designed. Installation in the 2018 Escape was complicated not because of the unit itself but the design of the vehicle. There was plenty of room in the underfloor area for the unit, but getting the wiring to the taillight assembles required removal of interior trim panels. It also took extra effort and a pull tape to get the power wire to the car battery. This installation took nearly two hours.

Gregory S.


Performs as designed


etrailer are the best. it's been a year since i purchased the kit and since then absolutely no issue. working just fine. strongly recommend it.


Product came super fast. Looks great. Will mostly be pulling a small boat. Took the mechanic 3 hours, mostly because of the wiring. Very happy with it. I gave up on trucks for now, so great addition to a car.
Great price too.

2017 Ford Escape

Installed this wiring kit in my 2017 Ford Escape about a year ago. Since then, it has worked every time with no issues. I have the 4-pole connector mounted to a bracket on the hitch. The connector has been fine living outside. My only complaint has to do with the install - a wire must be routed from the wiring harness controller (installed in the rear of the car near the taillights) to the battery (in the engine compartment). This was fairly difficult to do and, in my experience, was much easier if you run the wire down through the plug below the taillight area and along the bottom of the chassis on the outside (I think I snaked mine in between the chassis and the plastic covers on the underside of the car). I can't say this is a fault of this particular the wiring harness kit, as they seem to all require the battery wire.


Excellent. No problems at all.


It turns out I didn't need it, we found out the factory wire harness was mounted backwards under the rear bumper so if someone needs one I still have it


The wiring kit I ordered fit my vehicle perfect and was easy to install following the instructions that came with it.The order processing was also easy to use and the delivery time was less than I expected. I was completely satisfied.

Paul H.



2017 Ford Escape

Easy to install if you have even a little mechanical knowledge. Looks great!

Show More Reviews

See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

  • Correct T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector for a 2017 Ford Escape
    The correct T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector for a 2017 Ford Escape is part # 118715, not part # 118566 which is for the older models. Unfortunately, I can't recommend modifying the harness as you would no longer retain any factory warranties. If you want to hardwire I recommend the Vehicle Wiring Harness Kit part # C59496.
    view full answer...
  • Trailer Hitch Recommendation for 2017 Ford Escape
    The Curt # C114123 is the # C11412 hitch packaged with their # C45521 ball mount. The hitch is a fit for a VW Golf, and wouldn't fit your 2017 Ford Escape. For your2017 Escape, I'd recommend the US made Curt Class III hitch part # C13186. If the choice is available, I'll always recommend folks go with a class III hitch with the 2 inch receiver opening because you'll have a much better selection of hitch mounted accessories available. To complete your towing system, you'll also need a...
    view full answer...
  • Trailer Wiring Harness for 2018 Ford Escape Draws Power Without Trailer Hooked Up
    The trailer wiring harness, if functioning correctly, will not draw power from the battery on a 2018 Ford Escape until a trailer is attached with the signals activated. If you find this to be incorrect then there's an issue with the converter box on the trailer wiring harness. Therefore it would need to be replaced and I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118715 for this as it's our most reliable option for this vehicle. This harness does...
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  • Trailer Wiring Needed To Tow A Boat Trailer With A 2017 Ford Escape
    Hey Josh, If your 2017 Ford Escape has a tow package then you'll see a 7-pin round connector around the trailer hitch to plug the Hopkins # 30955 in. If you don't have this package/connector then you'll need the Tekonsha T-One Vehicle Wiring Harness # 118715. This will transfer your Escape's light signals through to the trailer. If your trailer has electric brakes then you'll need the # ETBC7 along with a brake controller. If it doesn't have brakes then the 4-pole is all you'll need....
    view full answer...
  • Does Tekonsha T-One Connector 118715 For 2017 Ford Escape Need To Be Hooked Up To Battery?
    I wish that would work, but the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118715 you were looking at for your 2017 Ford Escape will need to have the power run directly to the positive terminal of your battery. The reason for this is the module needs to have a dedicated circuit to the battery, and cannot be added to an existing circuit. Doing so will void the warranty of the harness. I included a video of the # 118715 for you to take a look at.
    view full answer...
  • Recommended Trailer Hitch Receiver and Wiring for Towing Trailer With 2017 Ford Escape Titanium
    There won't be an issue installing a hitch and wiring on your 2017 Ford Escape Titanium. As long as the trailer does not exceed the capacity of the hitch or your vehicle you will be fine. For a hitch I recommend the etrailer Trailer Hitch Receiver # e98866. This hitch features a matte black powder coat finish which provides more of an OEM look. It has a maximum gross trailer weight of 3,500 lbs and tongue weight of 350 lbs. For the most reliable wiring harness, I recommend the T-One...
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  • Will Adding Trailer Hitch Receiver, Wiring & Sway Increase Towing Capacity On 2017 Ford Escape?
    Just adding a Trailer Hitch Receiver # e98866, Wiring # 118715 and a Sway Control # 335TSC-1000 will not automatically allow you to tow a 3,500lb trailer with your 2017 Ford Escape. You will need to consult with your Ford dealer as there is also likely a required transmission cooler required and you will need to determine if there are any other requirements or if you have the correct 3.07 final drive ratio required to tow this much weight.
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  • Recommended 7-Pin Harness to Charge Camper Batteries on a 2017 Ford Escape
    The 7-pin harness you need for your 2017 Ford Escape is the # ETBC7. This will provide you with the power you need to keep your battery charged on your camper. As far as installation, it involves a splice-in process to your current wiring. In order to install this harness, you need to have a 4-pin harness already installed on your Escape. For that part, I recommend the Tekonsha T-One # 118715 over the competitor Hopkins option. This is because the T-One comes with a much higher overall...
    view full answer...
  • Trailer Wiring Harness For 2017 Ford Escape SE
    The exclusion is correct for the Curt harness, but we do have the correct trailer wiring harness for your 2017 Ford Escape SE, and what you need is the following, from Tekonsha: - T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118715
    view full answer...
  • How To Know If Your F2018 Ford Escape Has A Factory Tow Package
    If your 2018 Ford Escape has a towing package you'll have a 4-pole or 7-pole connector already installed or a port to plug in a 7-way socket like part # A10-7072VP. If you don't see any wire harnesses already installed then you'll need to pick up one like the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118715. This would allow you to tow a small trailer without brakes. If you needed to be able to tow a trailer with brakes then you'd first install the # 118715 and...
    view full answer...
  • CR-018 Skull Hitch Cover With LED Lights is Tripping Errors When Connected to a 2017 Ford Escape
    This is a pretty common occurrence with the Ford F-Series trucks but can also pop up on their SUV lines as well. If you have an aftermarket wiring harness installed, like the Tekonsha # 118715, you will first need to check the ground connection. If this is not secured to bare metal with a solid, secure connection, it can cause all sorts of issues. From there you will need to test the ports on the 4 Flat with something like the # PTW2993. If the converter box on the # 118715 is malfunctioning,...
    view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?

Info for this part was:

Employee Jackie C
Expert Research:
Jackie C
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Kathleen M
Video by:
Kathleen M
Employee Jonathan Y
Video by:
Jonathan Y
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Alexander C
Written by:
Alexander C
Employee Shane H
Test Fit:
Shane H
Employee Robert C
Test Fit:
Robert C

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