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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 # 118791
Retail:$130.38
Our Price: $99.58
You Save: 24%
Custom Fit Vehicle Wiring

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Tekonsha Custom Fit Custom Fit Vehicle Wiring - 118791
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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 118791 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 (18)
  • Q & A (0)
  • Photos

Tekonsha Custom Fit Vehicle Wiring - 118791

  • 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 behind tail lights
    • 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 tail light assemblies, threshold panel, and some of the felt trunk liner to access this harness.


T-One Connection Location Points Behind Tail Lights

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.



118791 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Installation Details 118791 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 - 118791

Average Customer Rating:  4.9 out of 5 stars   (18 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:
Volkswagen Jetta

Nice product-works well on the Jetta. Installation was a bear! Not your fault. Nature of my car



by:

Better than expected. Top quality and great customer service to get the right wiring. Install was took about 2 hours for hitch, slightly less for wiring as above average skill set. Allowed truck to be freed up using Jetta for short runs to local fishing spots.



by:

Very convenient



by:
2019 Volkswagen Jetta

Products were packed great!!! Pretty forward install, video was very helpful reference. Took a couple of hours to install hitch and t connector- took my time so not to damage bumper cover. Very pleased with install. Thanks etrailer.com!

Kevin

8/9/2022

Still working great!! Use it 2-3 times a week!! High quality product!



by:
2019 Volkswagen Jetta

Curt trailer hitch fit and bolted right up, no problem. No drilling, no rework.
The Tekonsha wire harness plugged in as advertised and made this wiring simple.
This is my second hitch from etrailer.com, +++



by:
2019 Volkswagen Jetta

just what I ordered, thank-you



by:

Simple install



by:

I purchased a hit and wiring for a trailer it was exact fit easy install great products very pleased shipped out and was at my house in three days I will purchase from here again



by:
2020 Volkswagen Jetta

Arrived 1 day earlier. All parts were present. Installation went well.
I ran the power wire through the car rather than underneath .



by:

I used it though just once but i believe it’s a great quality item ! Thank you!



by:
2019 Volkswagen Jetta

Works great easy to install



by:
2020 Volkswagen Jetta

Looks good and easy to install.
Timely
delivery



by:
2019 Volkswagen Jetta

Good one!!!



by:



by:



by:
2019 Volkswagen Jetta



by:
2020 Volkswagen Jetta



by:
2020 Volkswagen Jetta


18
18

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

  • Trailer Hitch Fit for 2019 VW Jetta R-Line
    The etrailer brand # e98848 hitch isn't a fit for a 2019 VW Jetta, but we do offer hitch fits for your vehicle. We offer both a semi concealed style hitch, the Draw-Tite # 24978 or the fully-visible Curt # C11540. Both are fits for the 2019 Jetta R-Line. Most folks prefer the semi concealed hitch, you can see what both look like once installed by looking at the photo I've edited for you. If you'll be doing some light duty towing with the hitch, you'll also need a trailer wiring harness...
    view full answer...
    Image 1 for
  • 2020 Volkswagen Jetta R-Line Hitch Receiver
    After reaching out to Curt on your behalf, they have confirmed that the Class I 1-1/4 inch Trailer Hitch Receiver # C11540 will work on your 2020 Volkswagen Jetta R-Line. They assured me that the only sub model that this hitch will not fit on would be the GLI model. Depending on what you're wanting to use the hitch for, here are a couple popular products I recommend getting. A ball mount would be good to have. Either a 1-7/8 inch ball # C45571 or a 2 inch ball # C45572. If you plan on...
    view full answer...
  • Trailer Hitch Fit for 2019 Volkswagen Jetta
    There are a couple of trailer hitches that are a fit for your 2019 VW Jetta, the Curt Trailer Hitch Receiver # C11540 and Draw-Tite Trailer Hitch Receiver # 24978. Both are Class I, 1-1/4 inch hitches, but between the two I strongly recommend going with the Draw-Tite hitch. The reason for that is the Draw-Tite has a concealed crosstube, which is not only aesthetically superior because you can't see the hitch tube, but it also means you have better ground clearance, to avoid any issues...
    view full answer...
    Image 1 for
  • Troubleshooting a 2020 Jetta R-Line With No Working Driver Side Signals
    Monty, the first thing I'd do is make sure everything is plugged in properly and the connectors aren't damaged in any way. The next thing, and honestly the last thing you can check is the fuses. Since the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118791 just plugs into your factory wiring and does not require any splicing there shouldn't have been any issue with the wiring itself, so it leads me to believe the fuse might be blown on the power wire. It also wouldn't...
    view full answer...
  • Will The Curt Hitch And Wiring From A 2020 VW Jetta Also Fit A 2021 VW Jetta?
    I will start by saying that the Curt Hitch # C11540 will fit the VW Jetta line from 2019 to 2021 as long as it is not a GLI model and or with dual exhaust. As long as don't have one of these, you are good to go. The wiring is a different matter though. I checked with Curt and they do not offer a custom fit wiring harness for this year range of Jetta, so I recommend going with the Tekonsha T-One Vehicle Wiring Harness # 118791. This is a direct plug an play kit, but you will need to run...
    view full answer...
  • Does the Draw-Tite Sportframe Trailer Hitch for 2020 Volkswagen Jetta Come With a Wiring Harness
    The Draw-Tite Sportframe Trailer Hitch # 24978 does not include a wiring harness. It includes the trailer hitch receiver and the hardware kit for mounting. For a wiring harness, you need the Tekonsha T-One Vehicle Wiring Harness # 118791. This plugs directly into existing wiring and gives you a 4-way connection at the back of your vehicle to power your accessory or trailer's signal lights. If you plan on doing some towing and need a ball mount, I recommend the Draw-Tite Drawbar for...
    view full answer...
  • Parts Needed For Towing a Endeavor Trailer With a 2019 VW Jetta
    Using the Draw-Tite Sportframe Trailer Hitch Receiver # 24978 on your 2019 Volkswagen Jetta the receiver is capable of supporting a trailer up to 2,000lbs with a tongue weight up to 200lbs. You will want to verify towing capability with your owners manual or dealer service department to determine exact capacities for your Jetta. More than likely with Endeavor rating the trailer for a class II receiver is for one of 2 reasons. As they list the dry weight at 530lbs with a load capacity...
    view full answer...
  • Troubleshooting Brake/Turn Signal Lights Only Flashing On Trailer When Headlights Are Off
    It sounds to me like the lights on your trailer are wired up incorrectly. The Running/Brake lights will typically use 2 separate filaments inside a bulb. The brighter should be for the brake/turn signals and the lighter for the running lights. If they are wired backwards it is hard to see the less bright light flash when the brighter lights are on. This is what it sounds like is happening on your trailer. There is another chance that the lights are shorting out. If that is the case your...
    view full answer...
  • Will Trailer Hitch Fit 2019 Volkswagen Jetta With Faux Dual Exhaust Trim
    Thank you so much for the photo it was very helpful! And since your 2019 Volkswagen Jetta has the faux dual exhaust which is just a trim and is not truly dual exhaust, you can absolutely install the Draw-Tite Trailer Hitch Receiver # 24978. I have added an additional photo a customer sent in which shows this hitch installed on a 2019 Jetta that has the same faux exhaust trim so you can see what the hitch will look like when installed on your Jetta. Additionally, if you plan on doing...
    view full answer...
    Image 1 for Image 2 for
  • Trailer Hitch Recommendation for 2019 Volkswagen Jetta for Towing a Trailer
    Both of the hitch options for your 2019 Volkswagen Jetta have the same capacities (but please do check your owner's manual for your Jetta's towing capacities) of 2,000 lb towing and 200 lbs tongue weight. So the only difference between the Curt Trailer Hitch Receiver # C11540 has a visible crosstube, while the Draw-Tite Trailer Hitch Receiver # 24978 does not. Due to the much cleaner look (which you can see in the accompanying photo on a Jetta), I recommend going with the Draw-Tite #...
    view full answer...
    Image 1 for
  • Trailer Hitch Wiring For A 2019 Volkswagen Jetta GLI
    Yes, the T-One Vehicle Wiring Harness # 118791 will fit your 2019 Volkswagen Jetta GLI. The description is saying basically it will fit all models of the 2019 Volkswagen Jetta.
    view full answer...
  • Best Trailer Hitch and Easiest to Install Trailer Wiring for 2019 Volkswagen Jetta
    The best hitch for your 2019 Volkswagen Jetta is the Draw Tite part # 24978. The reason I recommend this over the Curt that fits your vehicle is because this only has the hitch opening hang below the rear bumper which means it will be mostly hidden from view. For trailer wiring the best and easiest to install is the Tekonsha kit part # 118791 because it installs simply by plugging inline with your vehicle taillights and does not require any hardwiring or splicing like the universal kits...
    view full answer...
  • Poor Ground Connection Causing Both Trailer Turn Signals to Blink
    The symptoms you mention are typically caused by a poor ground connection, either at the trailer connector on the vehicle, the connector on the trailer or at one of the trailer lamp's grounding points. Make sure that the ground wire of the Tekonsha # 118791 is securely attached to the vehicle frame or chassis. I like to place a star washer between the vehicle surface and the ring terminal, the washer will bite into the metal for a secure, reliable connection. The same goes for the main...
    view full answer...
  • Does the Draw-Tite # 24978 Fit My 2019 Volkswagen Jetta GTI with Dual Exhausts?
    Yes! The Draw-Tite Hitch # 24978 works with your 2019 Volkswagen Jetta GTI with dual exhausts. As far as wiring, it sounds like you need a simple 4-way harness. This harness is typically used with taillight accessories such as bike racks or cargo carriers that have taillights on them. For a great harness that fits your Jetta, I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118791. The harness comes with a converter box that eliminates the possibility...
    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 Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Written by:
Alexander C

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