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

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

Part Number: TK77FR
In Stock
$99.06
Retail:$130.38
You Save: 24%
Custom Fit Vehicle Wiring

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TK77FR - Custom Fit Tekonsha Trailer Hitch Wiring
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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 TK77FR or order online at etrailer.com. 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 (42)
  • Q & A (0)
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Tekonsha Custom Fit Vehicle Wiring - TK77FR

  • Trailer Hitch Wiring
  • Custom Fit
  • 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. Powered ModuLite reduces strain on wiring system.


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
    • Locate connection points in rear cargo area
    • Plug in T-connector
    • Run 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


Specs:

  • Maximum amperage:
    • Stop/turn lights: 5 amps per circuit
    • Tail lights: 7.5 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located in the rear cargo area. You will have to remove the plastic threshold cover, side panels, cargo trays, and interior trim panels to access this harness.


Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then 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 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 Power Module

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.



118823 Tekonsha T-1 T-Connector - 4 Wire - Modu-Lite Converter Included

Installation Details TK77FR 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 - TK77FR

Average Customer Rating:  4.9 out of 5 stars   (42 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.

by:
BMW X3

Installed this on my 2021 BMW X3. Quite easy and stress free to install when following the tutorial video. No installation step was skipped in the tutorial. I was not lacking any parts to complete the project. A few days after installation I hooked it up to a U-Haul trailer and it worked as expected and proceeded without issue on my road trip. When not being used the cable tucks away unseen.



by:
2019 BMW X3

Installed this on a 2019 BMW X3 M40i. Very easy if you follow the video by etrailer on how to install this wiring harness. Make sure you have a good crimping tool.



by:

This wiring harness was not confirmed to fit my 2023 BMW x3 but the connectors looked right and they were . Had to move the brown wire on the left connector and on the right side the green wire had to move to align with the green wire on the car.



by:
2021 BMW X3

The wiring harness was really easy to use. Installation took less than 30 minutes.



by:
2020 BMW X3

Super easy install on my BMW X3m. The install video was super helpful.

Ryan

2/15/2024

No longer have the car but the wiring harness worked great the few times I towed with the BMW.



by:

Pretty standard plug-n-play harness. The power wire was a bit of a pain, though, in the X3 as you have to be really careful with your routing. The instructions and video make it look like you can just flop the power wire over the battery and be done with it. In reality, to make it look at least halfway near decent, you have to get creative - AND be careful if you ever plan to use the tuck away for the cargo cover.
Still, better than having to route it from the back all the way to under the hood.



by:
2018 BMW X3

Fantastic product. Easy to install and works great. Perfect fit!



by:
2020 BMW X3

The installation video made this very e asy



by:

We are happy with our whole package including hitch, receiver, wiring and ball mounts.

Rick

2/16/2023

Plug and play. I have only used it once since installation, and it did work as advertised.



by:

Easy install and seamless operation



by:

super easy install



by:
2018 BMW X3

Great video on how to install, complete kit with everything you need.



by:
2018 BMW X3

plug and play with no issues, everything you need in this kit.



by:
2019 BMW X3

Worked perfectly plug and play no complaints at all.



by:
BMW

Works well on a 2020 BMW X3M40i



by:

Great product. Easy install!



by:
BMW X3

Needed pin swaps to work properly on my 2022 X3.



by:

Incredible service! Stays with you every step of the way.



by:



by:
2018 BMW X3

The video is direct and helpful.



by:
2019 BMW X3



by:

Looks good, hopefully it is plug & Play



by:

Great price and very fast shipping



by:



by:

Very easy


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42
Show More Reviews

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


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Kathleen M
Installed by:
Kathleen M
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Written by:
Alexander C
Employee David F
Test Fit:
David F
Employee Thomas T
Video by:
Thomas T

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