bing tracking image
  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. Powered Converter
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

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

Item # 118659
lowest price pledge
Our Price: $51.37
You Save: 49%
Custom Fit Vehicle Wiring

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Orders above $99 qualify for Free Shipping
Shipping Weight: 1.67 lbs
In Stock
Custom Fit Vehicle Wiring 118659 - Powered Converter - Tekonsha
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

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.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
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. 1-636-306-4830 to order Tekonsha custom fit vehicle wiring part number 118659 or order online at Free expert support on all Tekonsha products. Guaranteed Lowest Price and Fastest Shipping for T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (43)
  • Q & A (0)
  • Photos
  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118659

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Powered 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. 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 in trunk
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes ModuLite to ensure that your vehicle's wiring matches that of your trailer
    • Powered module pulls power from 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-One connector plugs into your vehicle's wiring harness, which is located inside your trunk, behind the tail lights on both the driver's side and passenger's side. You will need to remove the rear threshold panel, any floor panels or trays, and some of the interior trim.

Once you've plugged in the T-connector, run the hot lead with the attached fuse holder to the car battery, which is also in your vehicle's trunk. Connect the fuse holder to the positive terminal on your battery and insert the provided fuse.

Once installation is complete, the 4-way flat connector will be stowed in your trunk.

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. 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. This power module functions as a tail light converter to combine 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.

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.

118659 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Installation Details 118659 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 118659

Average Customer Rating:  4.9 out of 5 stars   (43 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.

2019 Chevrolet Trax

This is the 2nd time I have ordered through this company for 2 different vehicles. This one was easy to install by myself. The installation videos were great to watch. I will use again when needed.


Fantastic product
Easy installation on
my 2016 Trax
Plug n play just like they said
And works perfectly

Chevrolet Trax

This is a real good, well designed and thoroughly thought out product. I was able to watch the video for the harness installation for my Trax vehicle and it was just like having someone there to assist me. I followed the written and video directions and had no problems. I am glad I didn't have to run the 20' power wire clear up to the battery, thanks to the great alternative guidance in the video, which was better and simpler. I shorted the rating a star due to my discovery that some directions were not required, such as the special tool to remove the harness connector on the passenger side. I just unplugged to taillight connector instead and inserted the T-harness. Also the video and instructions are a bit vague in putting all the parts back in their proper places. All in all, this was a much easier process than finding all the correct wiring, and where to manually splice the trailer light cabling onto each of them.

2016 Chevrolet Trax

Delivery was quick and with the help of U Tube I was able to complete the project easily.

Fantastic! The installation was easy and it has never failed through heavy use.
Stephen K - 09/26/2021

2015 Chevrolet Trax

When I ordered the item it said that it would fit my vehicle. When I got the product the package didn't list my vehicle so I was worried. Good to say is that it fit perfect. The packaging was great and the item works great. the installation was easy and had easy to follow directions. My 14 year old grand kid could of done it. Exellent company Will defenitly order from them again.

The product still works great.
skip b - 12/07/2017


Great wiring harness and really easy to install. Intructions were clear and easy to follow. I use my trailer a lot and hook up and unhook often, the harness and all connections never failed !!!!! 2 thumbs up!!!!!

Still going strong. No complaints
Chuck - 11/14/2018

2015 Chevrolet Trax

PLug and Play T-one T-connector 118659. Hardest part was removing the interior trim for my 2015 Chevrolet Trax. The instructions are quite vague. Once I got it hook up, It worked fine. Hooking it up was fairly easy after the panels were out of the wat.

Great wiring harness. Custom fit,easy to install ,Instructions easy to understand. I also reviewed the video ahead of time as well so I knew what I had to do. I highly recommend your product
LeeRoy H - 02/19/2018

2017 Chevrolet Trax

This connector made this installation the easiest I have ever done, I Love it.

I have a Leased Vehicle and will be turning it in shortly will be getting the same type of SUV just a newer model this will make thing a lot easier to disconnect
Ken G - 04/03/2020


wiring harness, installed perfect, went right in easy hook up! but after the hitch was damaged I now have no use for it?

Sold the vehicle
Daniel H - 12/08/2019


The harness worked perfectly! The [installation] videos were clear on how/where to run wires and mount the unit. I think a part was missing that needs to note to drill a hole to install the ground screw (or I missed it). Aside from that, it really works perfectly. I'm happy the power wire that runs on the outside of the car is thicker to put up with the elements. The video was very helpful in routing. I wish the price was a little cheaper but, its a solid unit and is still worth it.

2018 Chevrolet Trax

Watch the install videos before installing hitch and wiring harness. Nice to have a helper handing tools if working under car ramps. Saved about $150 in installation fees by doing it myself. I did feel install was moderately difficult, though glad i did it


This product could not have been any easier to install. I watched the installation video several times even before the hitch arrived so I had it in my head how things should go. I put the back end of my car (2019 Chevy Trax) up on my car ramps and went to work. I followed the instructions and it was like everything fell into place. Once I got the hitch up past the exhaust I could hold it up with my knee on one end and my hands on the other end. Got the screws started on each side on the bottom of the frame to hold it up and then the side bolts were a piece of cake. If you have a Trax like I do and need to haul small loads around, I highly recommend this product. It truly is a well designed custom fit product. I plan to purchase a 5 x 8 foot trailer with a fold down ramp that weighs 400 pounds so my pay loads will be around 800 pounds max. I think I'll nick name it "The Mini Hauler Express". No pictures because mine wouldn't be any better than the video.

2016 Chevrolet Trax

Super easy install, all parts were there. Delivered next day at cost. Definitely will be my number 1 go to moving forward. Next I need a brake controller for my 2016 Chevy Trax. I'm debating on the Curt bluetooth because it's effortless an no wires. 230 dollars though but probably well worth it. Give etrailer your business they deserve it and have tutorial videos. I watched mine 5 times before I got out and it only took me 10 mins to install. etrailer is number 1 in my book.


Thank you very much for fixing my meds up. Excellent service will use again Thank You!


Perfect Fit, simple install. I decided to use a factory standoff (stud) for the ground screw, rather than drill a hole. I bought a nut and toothed washer at the hardware store for 25 cents. Easy.


Great to get for trailer hookup. It plugged right in with no splicing . If you ever want to take it off you can easily. I love this wiring hookup.

2021 Chevrolet Trax

Haven't had a chance to install it yet. But the shipping was fast I ordered on a Friday got it on a Tuesday thank you very much


Easy to install


it arrived on time well packaged and everything that i asked for.


Plug n play is the only way to go.


Fit perfectly


Jai reçu le kit très rapidement.
Je n'ai
pas pris de photos ni de vidéo car les renseignements qui accompagne ce produit sont simples et complets.
Seulement 45 minutes pour l'installation et tout fonctionne très bien


A good price for the product and speedy delivery thank you

2015 Chevrolet Trax

video was a great help. I installed it in about the time it took the mechanic to read the instructions. Routing suggestions for hot lead were good.


got exactly what we needed,didn't wait long for it

Show More Reviews

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

  • Recommended Wiring Harness For 2015 Chevrolet Trax
    We have one trailer wiring harness available that is confirmed as a fit for the 2015 Chevrolet Trax. I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, part # 118659. You can access the wiring connections you need for the installation of the harness in the rear cargo area of your Trax behind access panels. You will then need to run the black power wire to the front of the vehicle and attach it to the positive post on the battery using the included in-line fuse.
    view full answer...
  • What Size Fuse Does The Tekonsha T-One Harness 118659 For 2015 Chevrolet Trax Use?
    The Tekonsha T-Connector # 118659 you were looking at for your 2015 Chevrolet Trax includes a 15 amp fuse that gets installed in the yellow fuse holder you mentioned. If you are needing a replacement fuse we have the Fuse Kit # PT52FR which includes 10 15 Amp fuses and multiple other fuses which are always nice to have on hand just in case. I included a video of the # 118659 for you to take a look at.
    view full answer...
  • Selecting The Correct Tekonsha 4-Way Wiring Harness For a 2020 Chevrolet Trax
    First you will want to verify your connector to determine which of the 2 connectors you have. The Tekonsha T-One Vehicle Wiring Harness # 118751 is confirmed to fit the LT and Premier Trims of your 2020 Chevrolet Trax. The connectors are different as these trims have LED tail lights. The Tekonsha T-One Vehicle Wiring Harness # 118659 will fit the LS trims with the base model incandescent tail lights. I have included pictures of both the different connectors for you to compare with...
    view full answer...
    Image 1 for Image 2 for
  • Height of Draw-Tite Trailer Hitch 36554 on a 2015 Chevy Trax
    The height from the ground to the inside top edge of the receiver tube opening of part # 36554 on a 2015 Chevrolet Trax is 11-1/2 inches. I've linked a video of when we installed this hitch on a 2015 Chevrolet Trax that shows the measurement. If you are trying to find out the rise or drop of the ball mount you need, the next step is to measure from level ground to the bottom of the coupler of your trailer. There is a recommended Class II ball mount for this hitch part # 36061. It looks...
    view full answer...
    Image 1 for
  • Do Trailer Hitches for 2018 Chevy Trax Include Wiring Harness
    None of the trailer hitches we have available include a wiring harness but one can certainly be added for your 2018 Chevy Trax. Starting with the hitch I recommend the Draw-Tite Class II Trailer Hitch Receiver # 36554. This is the only Class II hitch available for your vehicle so it features higher capacities than the Curt alternative and doesn't require you to use an additional stabilizing strap for any non-trailer load like a bike rack or cargo carrier. I have attached an installation...
    view full answer...
  • Which Custom Fit Wiring Harness Is Recommended For My 2022 Chevrolet Trax?
    As the Draw-Tite # 36554 is the only hitch currently available for your 2022 Chevy Trax, it is definitely pretty straight forward. The wiring is slightly more difficult, but I do mean slightly and you will know which one is correct shortly after reading this. So not to keep you waiting, but let the anticipation rise a little bit. And now for the big reveal. The Tekonsha T-One Vehicle Wiring Harness # 118751 is for the LT and Premier models and the Tekonsha T-One Vehicle Wiring Harness...
    view full answer...
  • Trailer Hitch Receiver and Wiring Harness Fitment For a 2021 Chevy Trax LS
    Yes, the Draw-Tite Trailer Hitch Receiver # 36554 is confirmed to fit your 2021 Chevrolet Trax LS as well as all other trim levels(LT & Premier) of your Trax. This has been confirmed by Draw-Tite to fit. When we installed this on a 2020 Trax as seen in the video linked below it had a bumper to hitch pin center length of 5-1/2" and 11-1/2" to the top of the receiver. These measurements are important for selecting the correct ball mount or hitch mounted accessory for carrying additional cargo....
    view full answer...
  • Trailer Hitch and Wiring for a 2015 Chevy Trax
    The wiring harness for your 2015 Chevy Trax is # 118659. None of the other wiring harnesses have been confirmed to fit the 2015. For a trailer hitch I recommend Hidden Hitch model # 90244. It comes with the proper ball mount. For a 1-7/8 inch ball use # 19256 and for a 2 inch ball use # 19258. If you want to use the hitch for an accessory such as a bike rack or cargo carrier then you have to make sure the accessory is rated for use with a Class I trailer hitch. Also, with a bike rack,...
    view full answer...
  • Availability of a Plug and Play Wiring Harness Kit for a 2016 Chevy Trax
    The plug and play wiring harness that's available for your 2016 Chevrolet Trax is the Tekonsha # 118659. I've attached an install video for you to take a look at. If you don't have a trailer hitch already I recommend the Draw-Tite # 36554. This is a Class II hitch with a 1-1/4 inch receiver opening. The recommended ball mount for you is # 36061 which includes a pin and clip. Then for a hitch ball use either # 19258 for a 2 inch ball or # 19257 for a 1-7/8 inch.
    view full answer...
  • Recommended Custom Fit Vehicle Wiring Harness For 2020 Chevrolet Trax LS
    We can definitely get you the correct vehicle wiring harness. The Curt T-Connector # C43FR you have is for the LT and Premier Models of the Chevrolet Trax. The Tekonsha T-One # 118751 you were looking at is for an LT or Premier Model as well. Since your 2020 Chevrolet Trax is an LS Model you will need to the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118659. I included a video of the Tekonsha T-One # 118659 being installed on a 2020 Chevrolet Trax and...
    view full answer...
    Image 1 for
  • Recommended Custom Fit Trailer Wiring Harness for a 2022 Chevrolet Trax
    The correct custom fit trailer wiring harness for a 2022 Chevrolet Trax will be based on trim package. The T-One Vehicle Wiring Harness is our best option, you'll need part # 118659 for LS trims or part # 118751 for LT and Premier trims. These are both plug and play options with no splicing required. They come with a 4-pin/4-way which is the most common connector and used on most trailers. If you don't already have a trailer hitch picked out, I recommend the Draw-Tite Trailer Hitch Receiver...
    view full answer...
  • Hitch Recommendation for 2019 Chevy Trax
    The 2019 Chevy Trax is rated for towing and we do have the Draw Tite hitch part # 36554 that fits this vehicle that has a 3,500 lb towing capacity which would be more than enough for a log splitter. Your vehicle looks to have a towing capacity of between 1,500 and 3,500 lbs depending on how it's equipped as well. Then for trailer wiring you'd want the part # 118659 for if you have an LS model or the part # 118751 for if you have an LT or a Premier. Then for a ball mount you'd want the...
    view full answer...
  • Trailer Hitch Compatibility with 2015 Chevy Trax and Towing Component Fit
    For your 2015 Chevy Trax there is not a class III hitch receiver from any of our manufacturers. They do offer Class II options which aren't quite as restricting as the Class I hitches. I recommend the Draw-Tite Class II - 1-1/4" # 36554. You can use this hitch with a hitch expander like # MT70032 to make it compatible with 2 inch accessories like a bike rack. You will however lose 50% of the trailer hitch's rated tongue weight when using an expander like this so the max tongue weight...
    view full answer...
  • Parts Needed to Tow a Trailer with a 2019 Chevy Trax
    We have the parts needed to tow a trailer with your 2019 Chevy Trax but the owner's manual states not to tow trailers with this vehicle so you'll be doing so at your own risk. I recommend finding/borrowing/renting a different vehicle to accomplish this but if you're bound and determined here is what you need: Draw-Tite Max-Frame Trailer Hitch Receiver - # DT32GR Trailer Wiring - LS # 118659 - OR - LT and Premier # 118751 Towing Kit - # C43KR Be sure to check out the linked ball mount...
    view full answer...

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

  • Why

    At we guarantee:
  • Highest quality custom fit vehicle wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate custom fit vehicle wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Joshua S
Video by:
Joshua S
Employee Dustin K
Video by:
Dustin K
Employee Jonathan Y
Video by:
Jonathan Y
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Video Edited:
Kathleen M
Employee Chris R
Video Edited:
Chris R
Employee Laura H
Updated by:
Laura H
Employee Alexander C
Updated by:
Alexander C
Employee Isabelle B
Updated by:
Isabelle B
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Written by:
Wilson B
Employee Brent H
Test Fit:
Brent H
Employee Robert C
Test Fit:
Robert C
Employee David F
Test Fit:
David F

At 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.