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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. 4 Flat
  4. No Tow Package
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
THIS ITEM IS NOT A FIT FOR
2021 Lexus IS 300
Tekonsha

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

$115.94
Retail:$160.99
You Save: $45.05
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2021 Lexus IS 300

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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 TK92KR 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.
  • All Info
  • Reviews (11)
  • Q & A (0)
  • Photos

Tekonsha Custom Fit Vehicle Wiring

  • 4 Flat
  • No Tow Package
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Plug-In
  • Tekonsha
  • Plug and Lead
  • Powered Converter
  • Hidden

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 to ensure that your vehicle's wiring matches that of your trailer
    • Powered module 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 your rear cargo area on both the driver's side and the passenger's side. You will need to remove the plastic threshold cover, cargo trays, and side panel to access the vehicle's taillight wiring 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 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.



118884 Tekonsha T-1 T-Connector - 4 Wire - Modu-Lite Converter Included

Item # TK92KR

Installation Details TK92KR Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.5

11 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:
2023 Lexus RX 500h

Installation on a 2023 RX500H. I have no idea why they insist on running a power lead to the engine compartment when this car has a trunk mounted battery. It even has an accessory terminal for the power cable. No need to run leads all the way under the car or cut or alter trim. Made the installation 75% easier. Battery is right there staring at you when you remove all the storage panels.



by:
Lexus RX 350

Bought for my 2024 Lexus RX350 and everything fit perfectly.



by:

Pourquoi faut il raccorder un négatif directement à la batterie car toute la structure de auto est raccordée au négatif de la batterie est ce pour protéger la remorque car on pourrait simplement installer le fusible entre le module et la structure de auto
Je l’ai installé cela a pris 1 h30 un peu de problème à défaire les panneaux du coffre cela préférais de meilleur illustration pour l’installation



by:
2023 Lexus RX 350

The wiring harness fit perfectly and the included instructions were easy to follow



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2025 Lexus RX 350



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2024 Lexus RX 350



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11
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See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

  • What is the Installation Difficulty for Your etrailer Hitch on 2025 Lexus RX 350?
    Hello Tom, Congrats on the new Lexus RX 350. Not a whole lot of cars grab my attention on the road, but the new grille on the RX 350 gets me every time! Our etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2" # e29ZV is listed as a 4 out of 10 for difficulty. No drilling is required, you will however need to lower the exhaust to install. I do not have an install video on our etrailer hitch, but it is identical to the Curt # C29VV (the only difference is...
    view full answer...
  • Will The Curt Trailer Hitch Receiver Prevent Use of the Hands Free Lift Gate on 2024 Lexus RX 500h?
    I can tell you John, I had the same concern when I installed a receiver on my Acura RDX. While my receiver did not entirely prevent the use of the kick sensor for the hands free liftgate it did limit the area I was able to kick due to the receiver. You will have the same issue on your 2024 Lexus RX 500h. Once you install the Curt Trailer Hitch Receiver # C29VV you simply need to test different areas around the receiver to figure out which area works best for the kick sensor. I do recommend...
    view full answer...
  • Wiring Harness for 2024 Lexus RX 350
    Hey Phil! You do not need a factory tow package to install a wiring harness on your 2024 Lexus RX 350. You can use the T-One Vehicle Wiring Harness # TK92KR. This plugs into the connection points in the rear cargo area and then a hot lead will run up to your battery. Once installed you will have a 4-way to power your trailer's signal lights. Do you already have a hitch on your vehicle?
    view full answer...
  • Recommended Wiring Harness for a 2024 Lexus RX 350
    Hey Karla. To add a 4-way wiring harness to your 2024 Lexus RX 350, you'll want the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector item # TK92KR. This harness fits the RX 350's that do not have the factory towing package. It plugs into your Lexus's factory wiring, which is located in your rear cargo area on both the driver's side and the passenger's side. If you do not already have a hitch, I recommend the Curt item # C29VV. If you have any additional questions feel...
    view full answer...
  • Recommended Wiring Harness for a 2024 Lexus RX350h
    I checked with Tekonsha and they have confirmed that the T-One Vehicle Wiring Harness item # TK92KR does not fit the 2024 Lexus RX 350h. I would back up Uhaul and not install the Curt Powered Tail Light Converter item # C59236 for their same reasons. The best option is to use the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit item # 119250KIT. This universal harness uses specialized clamps that do not require cutting or splicing into...
    view full answer...
  • Recommended Parts for Trailer Towing with a 2024 Lexus RX 350
    Hey Neil, thanks for reaching out to us! The Curt Trailer Hitch Receiver # C29VV is definitely the hitch I recommend for your 2024 Lexus RX 350 for a few reasons; currently it's the only one available for your vehicle, but even if that wasn't the case, it being a Class III hitch with a 2" receiver means you'll have a much wider variety of options to choose from when it comes to accessories than if you have a Class II hitch. This also features a hidden crosstube so it will look pretty sleek...
    view full answer...
  • Brake Controller Recommendation for 2023 Lexus RX350
    Hey Jason, I would recommend the Redarc Tow Pro Liberty part # RED52VR as it performs really well and only puts a small knob on the dash of your 2023 Lexus RX 350. To install it you'd need to first start with the 4-way kit part # TK92KR and then convert it to a 7-way with the part # ETBC7.
    view full answer...
  • Recommended Hitch for a 2024 Lexus RX350
    Yes, but that's just to get it installed the first time. I have linked the instructions below for the Curt Hitch item # C29VV. Step 2 covers this process and it's easier then it sounds. You just back out the muffler supports from the rubber hangers. It is recommended to prop the exhaust up while you're positioning the hitch. This will be the most difficult part of the install and you'll need an extra hand or two. The Curt Hitch item # C29VV is custom fit and bolts to your 2024 Lexus RX350...
    view full answer...

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


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Andy C
Installed by:
Andy C
Employee Sabrina W
Written by:
Sabrina W

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