bing tracking image
  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 7 Round - Blade
Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector

Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector

Item # TK55VR
lowest price pledge
Our Price: $290.99
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.

This item qualifies for Free Shipping
Shipping Weight: 5 lbs
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

Need help with installation?
Locate installers near me
Replace the 7-way, RV-style trailer connector on your vehicle with this T-One harness. ModuLite reduces strain on wiring system. Brake controller adapter plugs into your vehicle's wiring when installing your electric trailer brake controller. 1-636-306-4830 to order Tekonsha custom fit vehicle wiring part number TK55VR or order online at Free expert support on all Tekonsha products. Guaranteed Lowest Price and Fastest Shipping for Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - TK55VR

  • Custom Fit
  • Trailer Hitch Wiring
  • 7 Round - Blade
  • Tekonsha

Replace the 7-way, RV-style trailer connector on your vehicle with this T-One harness. ModuLite reduces strain on wiring system. Brake controller adapter plugs into your vehicle's wiring when installing your electric trailer brake controller.


  • Towing prep kit replaces damaged factory 7-way, blade-style trailer connector at the back of your vehicle
    • Enables your vehicle to power your trailer's signal lights
    • Compatible with 4-pole, 5-pole, and 6-pole adapters (sold separately)
  • T-One connects quickly and easily
    • Plug into connection points behind tail lights
    • Run body harness up to car battery
  • Included tail light converter ensures that your vehicle's wiring matches that of your trailer
  • Wiring adapter eases installation of your electric brake controller
    • Wire end plugs into your vehicle's built-in wiring port
    • Other end plugs into the back of your electric brake controller
      • Compatible time-delayed brake controllers: Draw-Tite Activator I (5100), Draw-Tite Activator II (5500), Draw-Tite Activator III (5520) and Tekonsha PowerTrac (39523)
      • Compatible proportional brake controllers: Tekonsha Prodigy (90185), Tekonsha P2 (90885), Tekonsha P3 (90195), Tekonsha Primus IQ (TK90160) and Tekonsha Voyager (39510)
  • 1-Year limited warranty

Installation of Tekonsha T-One Connector

This custom-fit T-One 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 to access this harness. Once you've plugged in the T-connector, run the body harness up to your car battery and connect the wires per the included instructions.

T-One Connection Location Points Behind Tail Lights

Once installation is complete, the 7-way 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 7-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 2-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's 3-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.

Installation of Tekonsha Brake Controller Adapter

This adapter plugs into the 4-pin connector on your vehicle's built-in brake control wiring harness. The harness is located to the right of the brake pedal, beneath the dash.

This adapter is designed to plug directly into your electric brake controller after connecting to your vehicle's wiring. You can unplug and remove your brake controller at any time and securely stow it away.

22127 Tekonsha Replacement Harness with Brake Control Adapter for Factory Tow Package - 7 Pole - Modu-Lite

Installation Details TK55VR Installation instructions

This Product Fits The Following Vehicles

Video of Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Review of Tekonsha Vehicle Wiring - Ford Bronco 7 Way Trailer Wiring - TK55VR

Hi there. I'm Michael with Today, we're gonna take a quick look at this Tekonsha OEM replacement vehicle wiring harness with brake controller adapter. This is going to replace a damaged factory 7-way blade style trailer connector on the back of your 2021 Newer Ford Bronco with the LED taillights. If your Bronco does not have the LED taillights, this will not work for your vehicle but if, as long as it does have the LEDs, you're good to go with this. It is going to enable your Bronco to power your trailer's signal lights so other motorists can see if you're stopping or turning and that sort of thing as you're towing your trailer.

This is a T1 system. So, it is going to connect very quickly and easily just right by your Bronco's taillights. You should find plugs that look like this that are already plugged together that connect your taillights to your vehicle wiring. You'll just pull those plugs apart and put this in line so that will re-complete the circuit. So, your Bronco's taillights will work properly, even if you're not hooked up to the trailer.

But then, it will also send those light signals back to your trailer. This does include this taillight converter. That's gonna ensure that your Bronco's wiring matches that of your trailer so that you're not gonna have any issues. Your trailer's lights will function properly. And this is going to run up to your Bronco's battery.

So, it's gonna pull power for your trailer's lights directly from your battery so it's not going to overload your vehicle's electrical system. Then, if you wanted to add your electrical brake controller, they do include this wiring adapter that's gonna make that a much easier process for you. So as you can see, it's gonna plug in to your system on the one side and then plug into your brake controller with the other side. This is going to be compatible with the time delayed brake controllers that you see on the screen there, as well as the proportional brake controllers that you see on the screen. So, depending on what kind you have or what kind you're looking to get, this will work with those that you see on the screen.

So overall, a really simple installation. They do include a very detailed diagram to walk you through and make sure everything's installed properly, as well as instructions to get it installed. So, I will say this is a fairly extensive installation but it's not super difficult. So, if you've done any sort of wiring before. If you're even a little bit mechanically inclined, I think this is something you can do yourself. You don't need to pay someone to do it for you. And then you'll have that 7-way blade style connector at the back of your Bronco so that you can hook up your trailer. Now, this is gonna be compatible with your 4 pole, 5 pole and 6 pole adapters as well. So, if you we're to ever need to tow a different kind of trailer and had a different kind of plug on it and you could use one of those adapters. Those are sold separately. We've got several options available for you here at But overall, if your original factory wiring system has been damaged, this is gonna be a very simple kit to get you up and running again. So, that completes our look for today. Again, I'm Michael with Thanks for watching..


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

  • 7-Way Connector and Brake Controller For a 2021 Ford Bronco Wildtrak Without Tow Package
    Yes, the Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter # TK55VR is specifically designed to be used on your 2021 Ford Bronco Wildtrack that did not come with a factory tow package. This kit will allow you to install the Redarc Tow-Pro Elite Brake Controller # RED63RR onto your Bronco and give you a clean factory look. A Mounting Bracket # 18138 will allow you to mount the 7-way connector to a Draw-Tite Max-Frame Trailer Hitch Receiver # DT37GR with its mounting...
    view full answer...

  • 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 Lindsey S
Edited by:
Lindsey S
Employee Michael B
Installed by:
Michael B
Employee Sabrina W
Written by:
Sabrina W

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.

Product Experts Available Now!
Call 1-636-306-4830