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  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 # 118801
Retail:$112.03
Our Price: $70.54
You Save: 37%
Custom Fit Vehicle Wiring

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Shipping Weight: 1.67 lbs
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118801 - Powered Converter 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 118801 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 (378)
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Tekonsha Custom Fit Vehicle Wiring - 118801

  • 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.


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 behind the driver's-side and passenger's-side tail lights. You will have to remove the rear threshold plate, privacy screen, storage covers, floor covering, and rear 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 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.



118801 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Installation Details 118801 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 - 118801

Average Customer Rating:  4.8 out of 5 stars   (378 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:
2020 Toyota RAV4

Great quality and sound design. Package arrived looking like it had been air-dropped, but the hitch only had a few scuffs on the paint, and the harness package was unharmed. I watched the [online] video a few times and read and reread the printed instructions. All were very helpful.

Harry

12/8/2022

Hitch is doing great! I do not actually pull a trailer, but have a cargo carrier that plugs into the trailer hitch in which I transport my 15 scale railroad flat car.



by:

The sales representative was amazing. Not only did he care about providing AAA services but also sent video's on how to install which made it so easy. I will definitely purchase through etrailer again.



by:
2019 Toyota RAV4

Hitch and lighting kit installed fine, but the videos didn’t mention differences in the 2019 RAV 4 Hybrid from the non-hybrid. I wanted to let you know about those.

HITCH
Not sure if this is solely a hybrid issue, but there was what was either a shipping tie-down or tow point bracket that required permanent removal, as it was right in the way of the hitch cross member. It’s quite heavy duty. Comes off easily, requires removal of two bolts. Passengers side, mounted on the bottom of the frame rail. I have included a photo, but not while it was on the car, I was focused on the install. I managed the install by myself, no lift, required jacking up at the rear jack point on one side to be able to slip the hitch up behind the chrome exhaust tips, as the distance between them is less than the width of the hitch. Also, appears the foot activated rear hatch auto lift will not work with the hitch, which is what Toyota said, but not what e-trailer said when I sent in the question prior to purchase. It would not have made a difference in my decision to buy. See attached photo

WIRING KIT
Very pleasant surprise, the battery on the hybrid is in the rear, passengers side below the passenger side panel. Running the power cable is a breeze. The battery is accessed by two removable panels, but just as in the video, I felt more comfortable nearly removing the large side panel to access the light connector. Also, I have the premium stereo, which as a woofer in the drivers rear panel. This does not cause any problems, but is worth mentioning to potential installers so they don’t get worried.

Jerry V.

7/22/2020

Well, I have hUled a trailer a few times, use the receiver for a hitch mount bike rack frequently. Light co be toe kit and instructions were excellent!



by:

etrailer has always been easy to work with. Their customer service and support is exceptional. There products are also very useful. I will continue to purchase from them in the near future. Thank you for all your help and support during the purchase process.



by:
2022 Toyota RAV4

I never thought I would be able to attach a trailer hitch and then put the wiring in. We recently bought a new car and we wanted a trailer hitch put on. The dealer wanted over $600. I believe I paid under $250 for the hitch and wiring harness. The videos are fantastic. It is step by step. Unless you are disabled, you should be able to do it. If you are shopping around you don't need to go any further. Customer service is A+. I never take the time to write reviews, but i just wanted to let others know what a good experience I had and saved over $350.

Earl

5/5/2023

It is great



by:
2019 Toyota RAV4

Quick ship. Just what I needed to get the wiring done without cutting into the existing wiring harness on the vehicle.

Dj Z.

9/7/2023

Used it just this weekend. Worked great!



by:

Fast shipping, everything there, easy to install, perfect interface, did everything I needed, MUCH cheaper than the OEM.



by:
2021 Toyota RAV4

Easy Peasy. Took me about 30 mins to install hitch on the new Rave Hybrid. Didn't even jack up the vehicle. Car was shiney new so exhaust hangers slid right off. Supported muffler w a stack of 2X4s. Removed access stickers and slid the hitch in place. Shimmed it up with more scrap 2x4 pieces. I have limited tools here at the winter house in Myrtle Beach, but 19mm box end got er done! Slid exhaust hangers back on, good to go. Wiring harness will have to wait a few weeks. Very happy, will use next week to drive to Dallas with Bike carrier on the back.



by:

It just a wiring harness that worked as intended.



by:

Excellent instructions and reasonably priced. In the end, I decided to pay a shop to install because I was too lazy to pull all the interior panels to route the wires. The shop would've provided a similar control unit and would've marked up substantially. Shop had no issue installing my customer-provided kit. Controlling my trailer lights perfectly.



by:
Toyota RAV4

This was the easiest hitch I have installed. Just 4 bolts going into the existing nuts in unibody of my 2021 RAV4.

Jon

8/3/2023

Still working great!



by:
2019 Toyota RAV4

This does not fit the 2019 RAV4 Hybrid for plug in installation. I got it so that I didn't have to splice the wires but ended up needing to splice them anyways.

Etrailer Expert

Mike L.

7/16/2019

I checked with Tekonsha just to be sure, and they have indeed confirmed that this is the correct wiring harness for your 2019 Toyota RAV4. After taking a look at your photo, it appears you might be looking in the wrong spot for the connectors. The photo you provided shows a photo of a connector outside the vehicle, behind the taillight assembly. The correct connectors are actually located behind the interior panels on both sides of the cargo area as shown in the installation instructions linked above.



by:
2019 Toyota RAV4

The installation video for my make and model vehicle was a great help. It gave me the confidence to pull a little harder on the interior plastic side panels knowing they would not break. Wire harness connectors fit perfectly with existing connectors. My hybrid vehicle has the 12v battery located in the rear on passenger side. This made the power connection a breeze. I will recommend Etrailer to anyone looking for your type of products.

Sam

11/8/2022

Trailer lights work perfectly each and every time.



by:

The install was just as described in the video. I was able to install the hitch by myself and the holes lined up perfectly with the hardware supplied. Thank you for a quality product.



by:

Very affordable. Shipped quickly. Correct fit. Inexpensive to install.

Tommy

10/30/2023

The wiring harness works very well. I have some mobility issues so had to pay for some help installing it but by following the instructions that came with the unit we were able to hide the cabling and it out of the vehicle exactly it needed to be for best use. It works every time and its easy to connect.

Etrailer Expert

Mike L.

11/14/2023

@Tommy That's great! We're so glad to hear that!


by:

Not much to say, working well, installation was relatively easy



by:

I installed the hitch apparatus and Light connector one year ago. Both pieces still look great and work flawlessly. I am in Florida and I see no signs of rust from the salt environment in my area.



by:

This trailer hitch impressed me. Unfortunately, we had an issue with [mechanic shop] and they did not connect the hitch on correctly which came disconnected. The emergency chains were hooked in and try to pull away the trailer, even slam back into the hitch, and there was very little damage to the actual hitch itself very impressed with the quality of this product.



by:
2019 Toyota RAV4

Following the etrailer tutorial made this task very easy. The wiring was even easier in my 2019 Toyota RAV4 Hybrid XLE because my car's battery is located in the rear passenger side corner of the trunk. So for power, I didn't have to run the cable all the way up to the front end of the car. My only wish is that the butt splices weren't so cheap and they included heat shrink ones instead.



by:

Exactly what I needed. Everything went together perfectly and is working perfect. Ordered for a second SUV.

Roy

8/27/2023

Perfect



by:

Gives a flawless finish like an oem acc essory.



by:

From ordering to installation of the parts, was very easy to do.



by:

Easy install. The instructions for wire connections were accurate but watching the video on the item page helped the most, especially with removal of the interior trims.



by:

Wiring and hitch has worked great. This is my third purchased for 2020 RAV 4, 2021 RAV 4 Prime and 2022 RAV 4 Prime.



by:
Toyota

Putting on the hitch was very straight forward and simple. The wiring was a bit of a struggle, but that was more due to Toyota than your product.


25
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Show More Reviews

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

  • Does Tekonsha Wiring Harness 118801 Fit 2021 Toyota RAV4
    Yes it's ok; the correct 4-way that fits your 2021 Toyota RAV4 is indeed the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118801.
    view full answer...
  • Trailer Hitch that Fits 2021 Toyota RAV4 Prime
    We do have hitches that fit the 2021 Toyota Rav4 Prime. I recommend the Curt Trailer Hitch Receiver part # C13416 which is a direct bolt-on fit. It is very easy to install and provides the larger 2" receiver tube so you'll have a greater capacity for towing and much greater selection of bike racks and cargo carriers to choose from. For trailer wiring then you'd want the # C56434 which is the easiest to install and most reliable.
    view full answer...
  • Will Tekonsha Wiring Fit a 2021 Toyota RAV4 Prime
    Both the Curt # C56434 and the Tekonsha # 118801 wiring will fit a 2021 Toyota RAV4 Prime, but right now (July 2023) the Tekonsha wiring is in a state of "limbo" as the parent company of Tekonsha was bought out earlier this year and everything is undergoing transitions. While we don't have a time-stamp for when the Tekonsha wiring will be back online, I can say that the Curt wiring is perfectly capable of safely and efficiently accomplishing the same goal as the Tekonsha alternative -...
    view full answer...
  • Recommended Trailer Hitch Receiver For A 2024 Toyota RAV4 Hybrid LE
    Hi Hart, The Curt Trailer Hitch Receiver # C13416 is confirmed to fit all models of the 2024 RAV4 so you would be able to use it on your Hybrid LE model. If you plan on towing a small trailer then you'll want to also pick up the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118801 in order to transfer your light signals to the trailer. I've attached a couple of videos below to help walk you through the installation process.
    view full answer...
  • Replacement Ring Terminal for T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
    I'm sorry to hear that you lost the ring terminal that came with your wiring harness. In order to replace the ring terminal that came with your T-One Vehicle Wiring Harness # 118801 you can use the Ring Terminal - 12-10 Gauge Wire - 5/16" Ring ID # 44-5356A.
    view full answer...
  • Recommended Easy To Install Trailer Hitch Receiver For 2021 Toyota RAV4
    For your 2021 Toyota RAV4 each of the hitches available install in the same fashion, and as such will be just as easy to install. Between all of the hitches available for your 2021 Toyota RAV4 I recommend the etrailer Trailer Hitch # e23ZR as it is made right here in the USA, and its matte black powder coat finish sets it apart for the other options as it will blend in to the plastic trim on your vehicle much better than the gloss black powder coat the other hitches use. This hitch has...
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    Image 1 for
  • Easiest Trailer Brake Controller To Install On a 2023 Toyota RAV4
    I recommend the Curt Echo # C51180 as being the easiest trailer brake controller to install on your 2023 Toyota RAV4. If you already have a 7-way this will connect into the 7-way and allow you to control the brakes from your smart phone using the Curt Echo app. If you do not have any trailer wiring yet you will need to start with the 4-Way # 118801 and then add the 7-Way Upgrade # ETBC7L. This upgrade kit provides power to the 7-way to operate the Curt Echo.
    view full answer...
  • Trailer Hitch Receiver and 4-Way Vehicle Wiring Harness For a 2022 Toyota RAV4 Hybrid
    Yes, the etrailer Trailer Hitch Receiver # e23ZR will fit your 2023 Toyota RAV4 hybrid. I have linked an installation video below showing the process of installation on a hybrid in our shop. I recommend installing the T-One Vehicle Wiring Harness # 118801 when you install the receiver. This will give you a 4-way flat connector which is needed for towing a small trailer or if you need Auxiliary Lights # C53201.
    view full answer...
  • Recommended Wiring Harness for 2019 Toyota RAV4
    The # 118801 and # C56434 are both confirmed to fit the 2019 Toyota RAV4. However, if you have the EU model of the RAV4 there is no guarantee these will work with your vehicle. As far as functionality is concerned, these two options are the same. However, the best choice is the Tekonsha # 118801. We have found Tekonsha to be the most reliable when it comes to wiring so I would always choose their wiring harness if one is available. The # 118710 is specifically designed for the Land Rover....
    view full answer...
  • Parts Needed to Install 7-Way Adapter on 2018 Toyota RAV4
    In order to add the additional wiring needed to use your brake controller and have 12V power you need the Wiring Kit for 2, 4, 6, and 8 Brake Electric Trailer Brake Controllers # 5506. This kit comes with everything you need to hook up the additional wires on your existing 7-way adapter. I'm not sure if you're going to use the Curt Echo # C27JR or the Curt Echo # C51180, but this will allow you to use either of them. I have attached an installation video for your reference.
    view full answer...

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


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Victoria B
Expert Research:
Victoria B
Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video by:
Joshua S
Employee Michael B
Video by:
Michael B
Employee Aidan B
Video by:
Aidan B
Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
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Kathleen M
Employee Dustin K
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Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
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Employee Alexander C
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Employee Shane H
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Ryan G

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