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 # 118777
Retail:$159.49
Our Price: $99.51
You Save: 38%
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.

Shipping Weight: 1.63 lbs
Add to cart
In Stock
118777 - Custom Fit Tekonsha Trailer Hitch Wiring
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

Customer Photos

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. 1-800-940-8924 to order Tekonsha custom fit vehicle wiring part number 118777 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 (12)
  • Q & A (0)
  • Photos

Tekonsha Custom Fit Vehicle Wiring - 118777

  • 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 in the rear cargo area. You will have to remove the trunk floor coverings, ceiling light, ceiling panel, side trim panels, and side access 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 an out-of-the-way location within 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.



118777 Tekonsha T-1 T-Connector - 4 Wire - Modu-Lite Converter Included

Installation Details 118777 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 - 118777

Average Customer Rating:  4.7 out of 5 stars   (12 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:

It works perfect for carrying my bike. hardware was missing but they been a great help sent me a new set. Really happy with customer service



by:
2023 Alfa Romeo Stelvio

Good product



by:
2020 Alfa Romeo Stelvio

Plug & play… made some modifications as Alfa is somewhat unique. Decided to do the wiring while the rear fascia was off the car while access was better. We chose the Draw Tight receiver. Have the 7 wire plug and Curt Bluetooth controller on order. Wow, things sure have changed since the ‘60s!



by:
2018 Alfa Romeo Stelvio

Bought this for my Alfa Romeo Stelvio ti Sport. This is a great product, totally plug and play, no cutting wires. The video was a big help I watched it a couple times. If you have the HK system with a subwoofer you will need to remove four nuts to pull it out a few inches to gain access. There's a hole behind it you will need to fish the wires through it to the tail light. This is the hardest part of the job, I have big hands and I did it. The passengers side is easy. Also drivers side wires are short so just mount the box next to the sub. All parts needed were with the kit, only needed to buy new clips that broke when removing trim piece that covers the rear hatch latch. After installing I hooked it up to my recently rewired trailer with LEDs and it worked perfect. If it wasn't for the video I probably wouldn't have attempted this on a $55K Itailan car but, all is good. Thanks etrailer.com!



by:
2021 Alfa Romeo Stelvio

It's a nice kit and the connectors work well. The problem is the left (driver's) side wiring is about 2 feet too short. With the bass speaker it is impossible to get the bulky connectors through to the light assembly. I ended up cutting the yellow and brown wires and running them through and splicing the wires to the harness plugs at the light assembly end. Over priced at nearly $xxx!



by:

Installation instruction were clear, accurate and easy to follow and execute. Perfect functionality first time, no redo, no troubleshooting needed. Plug in as per installation instructions and 'pin on' your trailer and go!



by:

Product itself was easy to install. Problem was in the instructions. Much more involved than the instructions show. Also many errors in the instructions looks like the started with another vehicles instruction and edited. But did not proof read. Example says you need a drill, but the instructions say not to drill (which you do not need to) but than it tells you to drill a whole. Also Ned to dissembled much more.



by:

Excellent product! Works perfectly and was easy to install.



by:

Connected right up with clear directions



by:



by:
2018 Alfa Romeo Stelvio



by:


12
12

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

  • Hands Free Rear Liftgate Compatability With Draw-Tite Receiver On a 2020 Alfa Romeo Stelvio
    The Draw-Tite Max-Frame Trailer Hitch Receiver # 76199 may affect the operation of the hands free rear hatch on your 2020 Alfa Romeo Stelvio. We have yet to get any reviews that confirm it will still operate but at the same time no one has said that it will not. With these type of situations it is often seen that the sensor will still operate correctly but it may only work to one side or the other and requires the motion to be very close the the receiver. I recommend installing the Tekonsha...
    view full answer...
  • Installation of Redarc Tow-Pro Liberty on 2020 Alfa Romeo Stelvio With CAN Bus System
    The only thing recommended outside of the normal installation process for the # RED24FR for a vehicle with a CAN bus system is the 30-Amp Circuit Breaker Kit for Redarc Tow-Pro Elite, Classic, and Liberty Trailer Brake Controllers # 331-CBK30-EB. This will protect your vehicle's wiring by preventing overloads. See the wiring diagram below. You will also need the Universal Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers # RED69FR to install the Liberty. Since it looks like you...
    view full answer...
    Image 1 for
  • Will Draw-Tite 76199 Class III Hitch Block Hands Free Liftgate on 2021 Alfa Romeo Stelvio
    Installing the Draw-Tite # 76199 Class III hitch on your 2021 Alfa Romeo Stelvio will prevent the liftgate sensors under the center of the bumper from picking up movement, but if you wave your foot a few inches to one side or the other of the hitch receiver opening, the hands free liftgate will work just fine for you. If you'll be towing with the hitch, you'll need a few other parts to complete your towing system. For a trailer wiring harness, use part # 118777. For a ball mount, use #...
    view full answer...
    Image 1 for
  • What is the Best Hitch for a 2023 Alfa Romeo Stelvio?
    The best hitch for a 2023 Alfa Romeo Stelvio is the Draw-Tite item # 76199. This hitch is custom fit and bolts to your Alfa with included hardware. This is a class III hitch with a 2" receiver. This hitch has a 4,000 lbs towing capacity and a 600 lbs maximum tongue weight. I really like this hitch because the crosstube mounts behind your rear bumper cover leaving only the 2" receiver visible. This not only looks better but also helps with ground clearance. I have attached a couple of...
    view full answer...
    Image 1 for Image 2 for
  • Recommended Hitch for a 2024 Alfa Romeo Stelvio
    Yes, it will unless you have the Quadrifoglio model. The Curt Trailer Hitch iitem # C13391 is confirmed to fit the 2024 Alfa Romeo Stelvio. This hitch is custom fit and bolts to your vehicle with included hardware. The Curt item # C13391 is a class III hitch with a 2" receiver. It has a 4,000 lbs towing capacity and a 600 lbs maximum tongue weight. I have linked an installation video below to help you get it set up. If you are planning on towing you will also need a wiring harness item...
    view full answer...
  • Recommended 4-Way Wiring Harness for a 2019 Alfa Romeo Stelvio
    That is not a common car and for us. To make a video we have to have one brought in by a customer. This hasn't happened which is why we don't have a video. We're based out of the middle of Missouri and there aren't many Alfa Romeos around here. I have linked the installation instructions below so you can see the steps. They are detailed and include pictures and should be helpful getting the Tekonsha item # 118777 harness set up. The T-One Vehicle Wiring Harness item # 118777 is confirmed...
    view full answer...
  • Alfa Romeo Stelvio Lightest Hitch Weight
    Out of the three hitches we have for your 2018 Alfa Romeo Stelvio the Curt Trailer Hitch Receiver item # C13391 you referenced weighs the least at 35 lbs. This hitch is custom fit and bolts directly to your Alfa Romeo with included hardware. This hitch and the others will weigh more when you add a ball mount like the Curt Towing Starter Kit for 2" Hitches item # C45534. This towing kit will provide you with a 2" ball and a fixed ball mount with a 3/4" rise and 2" drop. It also includes...
    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 Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Alexander C
Written by:
Alexander C

At etrailer.com 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.