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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. No Converter
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

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

Our Price: $70.54
You Save: 45%
Custom Fit Vehicle Wiring

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Shipping Weight: 0.75 lbs
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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 TK69FR 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 (134)
  • Q & A (0)
  • Photos

Tekonsha Custom Fit Vehicle Wiring

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • No 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 rear cargo area
    • Plug in T-connector
  • 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: 5 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 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.

118824 Tekonsha T-1 T-Connector - 4 Wire - Modu-Lite Converter Included

Item # TK69FR

Installation Details TK69FR Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - TK69FR

Average Customer Rating:  4.8 out of 5 stars   (134 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.


Starting at 5:15 out of 12:08 hitch installation you tube video by MasterJacks, followed his guide. Broke plastic installation pins, bought Ford plastic pins at Autozone, Toyota pins not close to OE. Used adhesive backed hook and loop fasteners to mount electronics box. Everything works.


Wiring harness connected right up to the 2022 Toyota Sienna. It comes with some Tape and mounting instructions that didn't quite line up with a Sienna that had a spare tire. I don't like 2 sided tape because I don't believe it will last in a hot car. I got a couple of self tapping screws and mounted the plastic box to the aluminum spare tire mount. Also used a self tapping screw to attach the ground to the aluminum spare tire mount.


Just got it 2 hours ago and it is all installed. Did a hitch receiver as well. Wiring went good. Used the rubber plug to run it through so it’s permanently tied to the receiver. Thanks!


Installation was a breeze. No wire splicing. Plugged into my 2021 and it's been working great!



still going strong!


Works great on my Sienna. Easy install once I got over popping interior panels off my brand new car


Hooks right up to an open connector behind the spare. There’s a rubber plug that goes through the bottom of the car, I used a knife to cut halfway through it and just slid the harness into the middle of the plug if that makes sense. Ran the wires to the hitch without a problem. Dropped the plug back in and it basically molded around the harness wires. Hooked up a trailer and it worked great


Easy installation with clear instructions. Very well packaged. Arrived very fast and the customer service was great! I knew where my product was at all times and when it arrived at my house.


Direct fit to factory wiring harness. Easy to install. Using for a year now without a single problem


So far so good. Works on my small lawn mower trailer just fine


Easy install, all plugs matched my OEM connectors


Easy to install, works exactly as advertised. Had to modify the installation slightly to clear the spare tire, but it was easy.

2022 Toyota Sienna

It takes a 5 minutes to complete a gob.
a package picture it shows different type of wire harness but inside is exactly what I needed.
Thanks again.

Toyota Sienna

Incredibly easy install. The Sienna has a wiring harness behind the spare tire so it was plug and play. I was able to use one of the rubber grommets to route the wires to the hitch.

2022 Toyota Sienna

The T-One harness from eTrailer looks great. The custom plug fits the Toyota Sienna 2022 Platinum harness making the electrical hook-up easy.


Solid trailer hitch, works great. Easy to put on. I like that there are places we can attach ratchet straps for our rooftop kayaks too.

2022 Toyota Sienna

It fits and works. I had to search YouTube for an installation video. Unfortunately for me, my 2022 Sienna does not have a spare tire compartment so the most challenging part of the installation was fighting with the panel.

2021 Toyota Sienna

Extremely easy to install on 2021 Sienna. Just plugs right into existing socket and then ground to existing bolt under the spare tire.

Barry B.


After a year, this adapter continues to work perfectly.

2021 Toyota Sienna

Easy to install. Would be great if the grommet that goes through the body would be supplied with the kit.

2021 Toyota Sienna

Relative easy install plug in, route wire, secure ground. Pretty straight forward. Now I need a trailer to hook it to. Prepping for a move with a U-Haul trailer. However my flat 4 pin trailer wiring test plug indicates it should be correct.

2022 Toyota Sienna

Works fine, but install should’ve been easier - instructions had me taking way more apart than was necessary, because they didn’t seem to be specific to my vehicle. Indicated factory harness was near rear seats when it was in fact right next to the lift gate.

2021 Toyota Sienna

Great website, better than most others out there since it includes detailed information including videos as to how to install the equipment and trailer light system.. Quick delivery, great communication throughout the process. Would definitely recommend etrailer to anyone and everyone I know.


Super simple to install. Works as expec ted.

Toyota Sienna

The 2021 Sienna has the connector underneath the spare tire, two mounted screws perfect for the grounding wire, and a rubber cover for easy access to underneath the vehicle to route your 4-way.

The trailer hitch receiver was easy to install, but the instructions were also wrong (removing the cover underneath the car was on the driver side, and not the passenger side). 5 stars as long as they get the instructions fixed so people don’t unnecessarily tear apart their car!


This product was simple amazing! I was shocked at how easily it installed - actually plugged into a pigtail hidden in the sidewall of my Toyota Sienna! I would rate this device as a 10 if that were possible! Toyota doesn't want you to know about this product because they don't want you pulling anything with a hybrid! Toyota actually started offering it - then quickly discontinued it! So glad this product was available!


Excellent. Five stars.
Very easy to install,
took me about half an hour. Only minor complaint is that there were a few small spots on the hitch that were not powder coated, so I’ll touch those up with enamel. I was also able to trim the underside panel a little more conservatively so as to leave the aft bolt attachement in place. Maybe not a big deal but given that it’s plastic and supposed to protect wiring from salt and road grime, I figured leaving as much intact as possible would be a good thing. etrailer shopping and follow up were great

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

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Alexander C
Written by:
Alexander C
Employee Noah M
Updated by:
Noah M

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