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  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. 4 Flat
  5. Trailer Hitch Wiring
  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

Item # 118519
Retail:$135.60
Our Price: $81.92
You Save: 40%
Custom Fit Vehicle Wiring

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Shipping Weight: 1.69 lbs
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Custom Fit Vehicle Wiring 118519 - Custom Fit - Tekonsha
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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 118519 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 (25)
  • Q & A (0)
  • Photos

Tekonsha Custom Fit Vehicle Wiring - 118519

  • Custom Fit
  • 4 Flat
  • Trailer Hitch Wiring
  • Tekonsha
  • No Converter

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 behind tail lights
    • Plug in T-connector
    • Run hot lead to battery
  • Includes ModuLite to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to the 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: 2.1 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 tail light assemblies to access this harness.


Tail Light T Connector Diagram

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 cargo area. It is recommended that you use a small amout 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.



118519 Tow Ready T-One Vehicle Wiring Harness

Installation Details 118519 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 - 118519

Average Customer Rating:  4.8 out of 5 stars   (25 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:
2015 Lincoln MKX

I haven't installed it yet I have bought hitches and light kits from this company before, and have always been happy with all their products and their super fast shipping.



by:
2012 Lincoln MKX

Got my wiring kit quickly as usual frokm etrailer. Installation instructions were spot on and made the install super easy. The hard part for me was running the power wire from the back to the front of the vehicle underneath and keeping it away from things that might damage it or cause a fire. I wonder why they don't let you fuse it to a power outlet wire in the hatch area but that is a manufacturer issue.

Etrailer Expert

Mike L.

7/5/2019

Thats a great question, and one we get frequently. Drawing the power directly from the battery serves to isolate the vehicles sensitive, complex and expensive to repair electrical system from any short circuits that may occur in the trailer wiring.



by:

One year after purchasing and installing the Tenosha Wiring Harness, I can proudly report the equipment has met my every expectation. As with any purchase made from etrailer, I am very happy with my purchase.



by:

Received my order in just 4 days which was great. Will order again from etrailer if I need more. Watched the installation videos which were a great help and was able to install trailer hitch receiver in about 1 hour by my self



by:
2015 Lincoln MKX

Great installation videos! Made installation go a lot quicker. Very easy to install. Product seems to be very durable. Good heavy gauge wire going from the battery to the controller. More than enough zip ties provided with it to secure the power line appropriately.



by:

This hitch is a quality product and is easy to install. The videos are extremely helpful. I know where I will buy my next hitch!



by:
2008 Ford Edge

Easy install and hookup with simple hand tools. Highly recommend these kits. Have used one before on an 08 Edge for nearly 5 years with no issues.



by:
2013 Lincoln MKX

Same part number as Draw Tite and no cross reference needed. I purchased this part $35 cheaper than I could get from my own wholesale supply company. etrailer shipped lighting fast. Part is exactly as specified.



by:
2011 Lincoln MKX

Ordering was easy. Item description was detailed. Install videos on youtube from etrailer made install very easy and efficient. Definitely recommend.



by:

Every thing went according to plan. Hitch and wiring came in a timely manner. Thanks



by:

Excellent product except you need another pull wire you only have four and it should be 6



by:
2012 Lincoln MKX

Great Product, Fast Shipping, Easy Installation. I could not be Happier!!!



by:

Delivered on time . Install was easy with install video.



by:

Great fit.Easy install



by:
2014 Lincoln MKX

Excellent transaction. Thank you.



by:

Great product and just as I ordered. The install is not for anyone without some good tools, a willingness to dismantle parts of the car and the desire to crawl under a car, but that is the nature of this item. I am very pleased.



by:

Easy to install and fit perfect



by:

Great product great service everything went absolutely perfect thanks to all involved



by:

Awesome people!



by:
2012 Lincoln MKX

Fast delivery and quality product



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by:
2012 Lincoln MKX



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by:
2014 Lincoln MKX


25
25

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

  • Can Blue Ox EZ Light Wiring Harness Be Installed On 2015 Lincoln MKX With 4-way Connector Installed?
    You sure can. The Blue Ox EZ Light Wiring Harness you mentioned will plug in-between the tail lights and the Tekonsha T-One Vehicle wiring harness you have installed on your 2015 Lincoln MKX, and since they will not be used at the same time you will not have any issues with overloading the wiring. I included a video of the # 118519 being installed for you to take a look at.
    view full answer...
  • Trailer Hitch and Wiring for a 2013 Lincoln MKX
    Starting with a trailer hitch you can use Draw-Tite Class III hitch # 75992 on your 2013 Lincoln MKX. This hitch has a 2 inch receiver and is rated for 400 pounds tongue weight and 4,000 pounds gross trailer weight. I have included a link to the installation instructions for you. For wiring you will not have to splice into the vehicle's wiring at all. The wiring harnesses for your vehicle plug in line with the tail light wiring. I recommend Tow Ready harness # 118519 because the tow Ready...
    view full answer...
  • Trailer Taillights Malfunction When Vehicle Headlights are Switched On
    What you're describing is the classic symptom of a ground problem. Everything works fine until the headlights are turned on, which is when the maximum amperage is drawn through the system. That's when a ground problem will rear its ugly head. On the vehicle side of the equation, there's a white ground wire exiting the converter box. Make sure that's connected to clean, bare metal on the vehicle. If there's any corrosion or undercoating or dirt that's preventing the back side of that ring...
    view full answer...
  • Does the Power Wire Need Run On Trailer Wiring Harness for 2012 Lincoln MKX
    The T-One Vehicle Wiring Harness part # 118519 is a great option for a 2012 Lincoln MKX. It is a powered harness as are all the options for this vehicle therefore you'd need to run a power wire to the battery in order for the trailer lights to work. This takes the strain off the factory lighting circuits. In order to complete your towing setup I recommend the Draw-Tite Max-Frame Trailer Hitch Receiver part # 75992 and etrailer Ball Mount Kit part # 989900.
    view full answer...
  • Is Tow Ready No-Drill Mount Bracket Required for Mounting 4-Way Connector to Hitch
    When used along with the Tow Ready Mounting Bracket # 18144, the No-Drill Mount Bracket # 18140 you referenced will provide a nice bracket for your Tekonsha 4-Way harness connector # 118519 that won't require any drilling into the Draw-Tite Hitch # 75992. The No-Drill Bracket is not absolutely necessary, but it is what we typically recommend to avoid drilling into your brand new hitch or bumper. I have attached a short video demonstration so you can see exactly how this is used.
    view full answer...
  • Parts Needed to Add a 7-Way Trailer Connector and Brake Controller on a 2013 Lincoln MKX
    In order to add a 7-Way trailer connector to your 2013 Lincoln MKX you will need to hardwire one in. First, you would need to install a 4-Way using # 118519. I have linked a video showing an example installation for you. Then you can use installation kit # ETBC7 to add a 7-Way. I have included some links that show and explain the ETBC7 installation for you. If you tow a trailer with electric brakes then you will also need a brake controller. I recommend the P2 # 90885 because it is easy...
    view full answer...
  • Availability of a 4-Flat and 5-Flat Wiring Harness to Power an Air Compressor on a Trailer
    With the set up on your 2013 Lincoln MKX, you best option will be to install the T-One Vehicle Wiring Harness, # 118519, and then use the Tow Ready 4 Pole to 5 Pole Wiring Adapter, # 20036. This the adapter will connect your 4 pole vehicle plug and 5 pole plug on your trailer. The trailer lights will be connected to your vehicle. The extra wire then can be wired up to the battery to power your air compressor. Depending on the amp draw of your compressor, I also recommend you wire in a...
    view full answer...
  • Trailer Hitch and Wiring Recommendation for 2014 Lincoln MKX AWD
    For your 2014 Lincoln MKX the hitch I recommend is the etrailer hitch part # e98870 as this is a USA made hitch with more than enough capacity for your vehicle, is priced great, and only has the hitch opening hanging below the rear bumper which means it's mostly out of plain sight. The best trailer wiring option is the Tekonsha kit part # 118519 because it's easy to install and comes with a very reliable converter box. I attached an install video for this kit for you to check out as well....
    view full answer...
  • Troubleshooting Factory Trailer Wiring on a 2011 Lincoln MKX, No Blinkers
    Sounds like you have a blown fuse or relay under the hood of your 2011 Lincoln MKX. Grab your owners manual and look up the fuse box legend. There should be a section that has tow package wiring. Check and replace those fuses as necessary. It also would be a good idea to check out the wiring of your trailer. There might be shorts on the turn signal circuits that caused the fuse to blow.
    view full answer...
  • Trailer Wiring Harness Options for a 2011 Lincoln MKX
    Curt trailer wiring harness # C56121 does indeed fit your 2011 Lincoln MKX. Installation will be the same as the video I have linked which features a 2013 MKX. We also have Tekonsha harness # 118519 or Hopkins harness # HM11140314 which also fit your MKX. They all install and function in the same manner but we do hear about fewer issues with the Tekonsha harness.
    view full answer...

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


Info for this part was:

Employee Joe V
Test Fit:
Joe V
Employee Shane H
Test Fit:
Shane H
Employee Ryan G
Test Fit:
Ryan G
Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Andrew K
Video by:
Andrew K
Employee Joshua S
Video by:
Joshua S
Employee Dustin K
Video by:
Dustin K
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Adele M
Updated by:
Adele M
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 Cole B
Installed by:
Cole B

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