bing tracking image
  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 # 118582
Our Price: $69.60
You Save: 31%
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: 1.73 lbs
In Stock
Custom Fit Vehicle Wiring 118582 - 4 Flat - Tekonsha
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

In Use/Installed

Need help with installation?
Locate installers near me
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. 1-636-306-4830 to order Tekonsha custom fit vehicle wiring part number 118582 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.
  • All Info
  • Reviews (15)
  • Q & A (0)
  • Photos
  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118582

  • 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.


  • 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 trunk
    • 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


  • Maximum amperage:
    • Stop/turn lights: 2.1 amps per circuit
    • Tail lights: 5.6 amps per circuit
  • 1-Year limited warranty


This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located inside your trunk, behind the tail lights on both the driver's side and passenger's side. You will need to remove some interior trim or carpeting to access the 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 an out-of-the-way location within your trunk.

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.

118582 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Installation Details 118582 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 - 118582

Average Customer Rating:  4.7 out of 5 stars   (15 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.

2016 Nissan Sentra

Hitch slider as expected, wiring was a breeze. I opted to keep the main powered wire external rather than muck around with it but plug and play and the lights are spot on, no splicing so I can return it to factory if needed for some reason. Hands down the easiest trailer wire I have installed and customer service that should be used as a benchmark for the digital world.


I have yet to receive the wiring harness so I am unable to rate the wiring harness at this time.

I see that you have also received a hitch receiver. We like to keep all of the items in the same box. Can you please check the box holding your hitch to make sure that the wiring harness is not also in there?
-- Etrailer Expert Katrina B - 04/26/2022
My mistake, I received the light kit inside the box that the trailer kit came in.
-- comment by: Ronald S - 04/26/2022


Haven't recieved it yet

2019 Nissan Sentra

I have ordered my trailer needs from etrailer for years! I have never been disappointed and believe I never will. The light harness I ordered and received is excellent!! Thank you etrailer !!


Just installed a Curt trailer hitch from etrailer, on a 2013 Nissan Sentra , and it fit like a glove - Thank you to Greg of etrailer for helping with the particulars


Wire under the car difficult limited attachment points.


Great price, quality product. Already installed.

2014 Nissan Versa Note

Works great. Installed as easily as they said would. Fast shipping.

2013 Nissan Sentra

Works Great! Fast shipping!

2015 Nissan Versa Note

2016 Nissan Sentra

2017 Nissan Sentra

2018 Nissan Sentra




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

  • Recommended Trailer Hitch and Wiring for 2017 Nissan Sentra
    For your 2017 Nissan Sentra, I recommend the Draw-Tite Class I Sport Frame Receiver Hitch # 24907. This Class I hitch is confirmed to fit your vehicle as long as you do not have the SR model. I recommend this over the Curt alternative because unlike Curt, Draw-Tite does not require you to use additional stabilizing straps for non-trailer loads, such as bike racks and cargo carriers. We have not yet had a chance to install this on your 2017 Nissan Sentra, so we do not currently have a...
    view full answer...
  • Comparing Curt and Tow Ready Trailer Wiring Harnesses for a 2014 Nissan Versa Note SL
    Like you mentioned, the Curt trailer wiring harness # C56206 for the 2014 Nissan Versa Note does not require a direct connection to the vehicle battery whereas Tow Ready harness # 118582 does. At the back of the vehicle the installation of the harnesses will be the same. The only difference is that power wire on the Tow Ready harness. That power wire is what will power the trailer lights. With the Curt harness the trailer lights will be drawing on the vehicle tail light wiring. Modern...
    view full answer...
  • Trailer Wiring Recommendation for a 2015 Nissan Versa Note
    I have a solution for you, but the # HM11143704 only fits the sedan models of the 2015 Nissan Versa. What you have is the 2015 Nissan Versa Note so you would instead need the # 118582 which has the square connectors you described.
    view full answer...
  • Will the Draw-Tite DT48MR Hitch Fit a 2021 Nissan Sentra SR
    The Draw-Tite # DT48MR will indeed fit your 2021 Nissan Sentra SR, and actually the SV models as well. Though there will be drilling required for the installation, as with all hitches for your vehicle, the included instructions will lay out what needs to be done in detail. If you were planning on towing with your Sentra SR, I recommend also installing the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat # 118582. This is mostly a plug and play harness, but you will need to run one...
    view full answer...
  • Recommended Trailer Hitch for a 2014 Nissan Versa Note
    I recommend the Draw-Tite I hitch # 24909 as the towing capacity is 2,000 pounds and will have a maximum tongue weight of 200 pounds. It's corrosion resistant and the fully welded steel construction ensures great strength and durability. A pin and clip is included with this Draw-Tite hitch # 24909 and if you plan on doing any light duty towing, I recommend the ball mount # 3592, 2-inch hitch ball # 19258 or 1-7/8 hitch ball # 19256 and wiring by Tow Ready # 118582. I would double check...
    view full answer...
  • Will Draw Tite Hitch 24909 Fit a 2014 Nissan Versa Note S
    Draw-Tite trailer hitch # 24909 is listed as a fit for all models of the 2014 Nissan Versa Note so that means it would also fit the Versa Note S. For trailer wiring you would then want the part # 118582 which is also a confirmed fit. For a ball mount you would want the part # 3592. For a 2 inch ball you would want the part # 19258 or for 1-7/8 inch ball part # 19256.
    view full answer...
  • Height of Curt Trailer Hitch C11349 For 2016 Nissan Sentra
    Definitely can help you out here and the height from the ground to the top of the receiver on your 2016 Nissan Sentra will be approximately 10 inches for the Curt hitch you asked about, which is the following part number: - Curt Trailer Hitch Receiver # C11349 The actual height should be very close to that once you install the hitch, but could vary based on a number of factors, like tire pressure or size, etc. So I do recommend installing the hitch first and measuring it and the coupler...
    view full answer...
  • Parts Needed to Tow Motorcycle Trailer with 2017 Nissan Sentra
    I have a solution for you, but the Curt # 13555 is designed to fit on mid 2000s Honda CR-V's and not the 2017 Nissan Sentra, so you wouldn't be able to use that hitch. Instead, I recommend using the Curt # C11349 which is a confirmed fit on your vehicle. The Curt hitches tend to have a more durable powder coating on them to some of the other available hitches so it will hold up much better to rust and corrosion. In order to tow with your 2017 Nissan Sentra you will also need a wiring...
    view full answer...
  • Will the Draw-Tite Sportframe # 24794 Fit a 2018 Nissan Sentra
    We do have a trailer hitch that is confirmed as a fit for your 2018 Nissan Sentra but the Draw-Tite Sportframe # 24794 only fits Nissan Sentra models from 2007-2012. For your 2018 you need the Draw-Tite Sportframe # 24907 instead. You will also need wiring # 118582, a draw bar like part # 3593, and a hitch ball like 1-7/8" part # 19256 or 2" part # 19258. Be sure to follow any instructions in your owner's manual regarding towing with your vehicle.
    view full answer...
  • Trailer Hitch Receiver and Wiring Harness For a 2022 Nissan Sentra SR Trim
    The Draw-Tite Sportframe Trailer Hitch Receiver # DT48MR is confirmed to fit your 2022 Nissan Sentra SR. The S is the only trim level of your Sentra that the receiver will not fit. Draw-Tite recommends using their Drawbar # 3593 in the rise position with either a 1-7/8" Ball # 19256 or 2" Ball # 19258 to match your coupler. I recommend adding the T-One Vehicle Wiring Harness # 118582 when you install the receiver. This will allow you to connect to small trailers with a 4-way flat connector...
    view full answer...
  • Highest Capacity Trailer Hitch Receiver for 2017 Nissan Sentra
    The highest capacity trailer hitch receiver for a 2017 Nissan Sentra is 2,000 lbs towing and 200 lbs tongue weight (please keep in mind there are no fits for a Sentra SR) the Draw-Tite Trailer Hitch Receiver # 24907 and Curt Trailer Hitch Receiver # C11349. You mentioned 103 kg (227 lbs) and neither of these hitches will be able to utilize a motorcycle and carrier with that much weight, and there isn't a hitch available for your Sentra that will allow you to use a carrier. The only option...
    view full answer...
  • Trailer Hitch That Fits 2013 Nissan Sentra SV
    Yes, the Curt Trailer Hitch # C11349 is absolutely compatible and will fit your 2013 Nissan Sentra SV. This is a Class I hitch with a 1-1/4 inch receiver and is a complete bolt-on installation, which is great for your car because it does not require any drilling to install. For wiring which will give you a 4-way connector and allow you to power your trailer's lights you need Wiring Harness # 118582. The correct ball mount for this trailer hitch is the Curt # C45521 which requires Pin...
    view full answer...

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

  • Why

    At we guarantee:
  • 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
Written by:
Lindsey S
Employee Joshua S
Video by:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Isabelle B
Updated by:
Isabelle B
Employee Brent H
Test Fit:
Brent H

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