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  1. Custom Fit Vehicle Wiring
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  3. Custom Fit
  4. Trailer Hitch Wiring
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T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # 118784
Our Price: $70.30
Custom Fit Vehicle Wiring

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Tekonsha Custom Fit Vehicle Wiring - 118784
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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 - no cutting, splicing or tapping required. Powered ModuLite reduces strain on wiring system. 1-636-306-4830 to order Tekonsha custom fit vehicle wiring part number 118784 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 (620)
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  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 118784

  • 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 - no cutting, splicing or tapping required. 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 - no cutting or splicing of wires
    • Locate connection point in rear cargo area
    • Plug in connector
  • 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: 2.1 amps per circuit
    • Tail lights: 4 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 interior trim panel in your rear cargo area.


Once installation is complete, the 4-way flat connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.


It is recommended that you use a small amount of grease on all electrical connections - the plug 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.



118784 Tow Ready T-1 T-Connector - 4 Wire - Modu-Lite

Installation Details 118784 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 - 118784

Average Customer Rating:  4.9 out of 5 stars   (620 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 - no cutting, splicing or tapping required. Powered ModuLite reduces strain on wiring system.

by:

Bought this with this the etrailer brand hitch for my 2022 Hyundai Santa Fe Calligraphy. Easy plug and play install. Wiring harness package was missing when the hitch arrived as the box had popped open and it most likely fell out. Customer service had a replacement in the mail the very next day. Thank you!




by:

I am so glad I came upon the Curt trailer hitch receiver. It's exactly what I was looking for because it actually has the crossbar tucked behind the bumper and all you can see is the receiver! And the T-One harness was easy to install and works great.




by:

Harness easy to install actually had alot more wire than needed. I understand Hyundai has now issued a recall related to their factory towing harness, who supplies this harness are they similar or the same supplier.




by:

Great plug and go setup!




by:
2021 Hyundai Palisade

This was extremely easy to install. The majority of time is spent deciding how you want the wiring ran over to the hitch. Hooked it up to a trailer and all lights functioned correctly.




by:

I work for a major dealership and often have customers that want a tow hitch installed. To save the customer money from ridiculous labor rates, I order all hitches, wiring harnesses, etc… from etrailer. The Tekonsha wire harness is as simple as it gets. No cutting, splicing, just straight plug and play. This kit comes with plenty of length to suit your needs and zip ties to secure any unwanted length. When you find the right product why look any further.




by:
2022 Hyundai Santa Cruz

Wiring harness was a true plug and play. Hitch took a little longer but I think it was due to the access for tightening the bolts to the correct torque.




by:

Hitch fit and looks great. The tips in the install video were spot and a big help.

My only grip is the 2 sided sticky tap to attach the wiring controller to the car body is a joke. I found a place to secure it withe included screw. E-trailer should redo their install video to show where to install with screw




by:
2019 Hyundai Santa Fe

Quick shipping. Packaged well. Clear instructions. Fit my 2019 Hyundai Santa Fe without any problems. Everything needed was included. If you think it will be exposed to moisture and/or get wet, then use some dielectric grease before connecting into the cars wiring.




by:

Excellent product and customer service. I contacted eTrailer when I didn't get delivery inside the 2 day window that I paid for and they responded immediately correcting the billing. Also the packaging used by eTrailer was superior to other providers I had received trailer hitches and products from in the past.




by:
2022 Hyundai Santa Cruz

I really like the plug-and-play It would be nice to have a reverse light plug in
to make wiring a little easier. I most likely will purchase the trailer hitch hookup in the near future depending on the price.




by:

Product seems good. Packaging was terrible, the part was just put in the big box with the hitch. How it didn't get damaged is nothing short of a miracle. I oreded 3 parts with t he hitch and 1 was lost during shipping. I told the seller and I was insulted by them. I believe I know how to look in a box and find the parts inside. Maybe the small bracket went out one od the two hand holes or t he gaping hole the hitch made in the box. Packaging was sad. A hitch in a cardboard box with no enter packing, then my 3 other parts threw in the box separately. They already have my money, they don't care what damage is done in shipping. Most are not going to send it back because some of the paint was rubbed off.


Comments
Thank you for bringing this to our attention. I will have our customer service team reach back out to you so we can have this taken care of for you.
-- Etrailer Expert Jenny N - 07/19/2022


by:

I have received the product, it came in a reasonable time and was packaged well. I wished the hitch had been available in gloss but the matte is ok, I haven't installed it yet so I don't know about fitment yet but if all goes well is certainly reasonably priced.




by:

The 4-flat connector is too big for the typical mounting bracket that I bought. You should warn you customers that they must get a larger mounting bracket.




by:

I own two 2022 Santa Fe's. I put one of of these harnesses on each. Both were flawless. Easy install and perfect function. I still have not figured out a good way to secure the flat connector to the round hitch body, though. Great device. Great time saver. Well worth the price.




by:

I purchased my first hitch from etrailer several years ago and have been very satisfied with it. I only needed to make this purchase because of a trade in truck to a new one and the hitch wouldn't fit. My first thought was to buy another etrailer hitch and after a very timely delivery and unboxing, I see that the quality is everywhere including the shipping container. I know that this hitch is going to fit and give me several years of pleasurable towing .




by:

Extremely good customer care and the hitch works perfectly. Was fairly east to install. I stacked boards under it to raise it to the correct height and hold it in place while bolting to frame. Thank you.




by:

Was surprised at how well the installation went! Unit's clipped together easy and good instructions as well..!




by:

The wiring harness was a perfect recommendation, and was installed by my auto shop with ease. Thank you etrailer...




by:

The installation of the wiring harness was easy, because I watched the video along with the listing... They made it simple. The hardest part was trying to do ties it down to the bumper cover area.




by:

Couldn't have asked for a better experience. Everything not only came delivered fast, but all holes lined up just fine soo installation was a breeze - including the wiring. Very happy with etrailer!




by:

This was super easy to install. My 13 year old grandson did most of the work. Great harness and easy to install!




by:

The Curt hitch is a much cleaner fit on my new Santa Fe. I waited for weeks to get a hitch from my Hyundai Dealership and then they ordered the wrong one. etrailer delivered my hitch in just three days....Outstanding people to do business with.




by:
2022 Hyundai Santa Cruz

Nice hook up to the factory wiring connection. Depending on where you want to run the wiring, might consider much longer zip ties. I ran mine behind the hitch. The install didn't take very long.




by:
2023 Hyundai Santa Fe

Good quality, half the price of the factory harness.



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Show More Reviews

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

  • Trailer Wiring Harness Available for 2019 Hyundai Santa Fe
    We do have a wiring harness to fit your 2019 Hyundai Santa Fe. The correct part is # 118784. Since you have the tow package there's a connector under the rear bumper on the driver's side. The harness plugs in here and then you need to find a good secure location to mount the converter box. It mounts with included double sided tape you just need to make sure the location you choose allows for the 4-way connector to reach the connector on the trailer. You also want to make sure the...
    view full answer...
    Image 1 for
  • Which Trailer Wiring Harness for 2020 Hyundai Santa Fe
    The correct trailer wiring harness for a 2020 Santa Fe with the tow package is the Tekonsha # 118784. If you click the link, you can see an installation video showing the harness being installed on a 2019 Santa Fe. The procedure would be the same for your 2020 model.
    view full answer...
  • Correct Wiring Harness For 2020 Hyundai Santa Fe With Trailer Tow Prep Package
    The wiring harness that you need for the 2020 Hyundai Santa Fe is the Tekonsha T-One Vehicle Wiring Harness for Factory Tow Package part # 118784 which will give you a 4-pole flat on the Santa Fe to illuminate the trailer's lights. This wiring harness will plug into the factory tow package behind the rear bumper. I have attached a video for your reference.
    view full answer...
  • Correct Trailer Wiring Harness for 2020 Hyundai Santa Fe with Factory Tow Package
    For your 2020 Hyundai Santa Fe that's equipped with the factory tow package, the correct (and best) trailer wiring harness is the Tekonsha T-One # 118784. This custom harness is going to plug right into that factory tow port beneath the vehicle, on the driver's side (see attached image). That's the only connection you will need to make and you'll have a reliable 4-Way connector at the bumper to connect with and power your trailer's basic signal lights. I have attached an installation...
    view full answer...
    Image 1 for
  • Correct Wiring Kit For a 2020 Hyundai Santa Fe With Trailer Tow Prep Package
    The 4-pole wiring for the 2020 Hyundai Santa Fe is the Tekonsha T-One Vehicle Wiring Harness for Factory Tow Package part # 118784 which will plug into the factory towing package underneath the vehicle along the frame rail. The Tekonsha brand wiring has proven to be more reliable and durable than the other brands, especially the converters. I have attached an installation video for your reference.
    view full answer...
  • Correct Trailer Wiring Harness for 2020 Hyundai Santa Fe with Tow Package
    Yes, for your new 2020 Hyundai Santa Fe we have the Tekonsha T-One Vehicle Wiring Harness # 118784 that will work perfectly. This custom harness is designed specifically for this model Santa Fe and will plug right into an existing port located behind the rear bumper on the driver's side. This will provide you with the needed 4-Way connector to hook up with and power your trailer's basic signal lights. I have attached an installation video below on the 2019 model Santa Fe that you can...
    view full answer...
  • Help Finding the Trailer Wiring Harness Plug on a 2019 Hyundai Santa Fe
    The correct trailer wiring harness for your 2019 Hyundai Santa Fe is the T-One Vehicle Wiring Harness part # 118784. The port on your Santa Fe that this harness will use is located under the vehicle, behind the rear bumper, on the driver’s side of the vehicle. I am not sure which photo you referenced but have attached one from the instructions for you. I spoke to my contact at Tekonsha and they stated that this plug will be present even though you do not have the factory tow package....
    view full answer...
    Image 1 for
  • Trailer Wiring for 2019 Hyundai Santa Fe Without Factory Tow Package
    The Tekonsha T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # 118784 according to the manufacturer fits vehicle without the factory tow package. You can confirm you have the tow wiring harness this connects to by looking under the vehicle behind the rear bumper on the driver's side. I've attached a photo to assist.
    view full answer...
    Image 1 for
  • Recommended Trailer Wiring Harness for 2020 Hyundai Santa Fe
    For your 2020 Hyundai Santa Fe the best trailer wiring harness is the Tekonsha T-One # 118784 because of its superior converter module that is built to last. This custom harness will plug right into a factory port under your Santa Fe (on the driver's side) to provide you with a 4-Way connector to power a trailer's basic signal lights. I have attached an installation video on the 2019 Santa Fe that you can follow along with.
    view full answer...
  • Trailer Wiring for 2021 Kia Telluride without Trailer Package
    We've recently learned that the 2021 Kia Telluride models come with the trailer wiring pre-wiring so the Tekonsha part # 118784 would be all you'd need to install trailer wiring.
    view full answer...
  • Do All 2021 Kia Tellurides Have Tow Package for Trailer Wiring Harness
    The 2021 Kia Tellurides all come with the factory tow package port that the T-One Vehicle Wiring Harness part # 118784 plugs into. It does not have to come equipped with the factory tow package per se. It's a direct plug-in fit for all models regardless of options.
    view full answer...
  • Does 2020 Kia Telluride Come Pre-Wired for Trailer Wiring
    The 2020 and 2021 Kia Telluride trailer wiring setups are the exact same. So yes all of the 2020 Kia Telluride models come with trailer pre-wiring so the # 118784 that you referenced would fit and work great.
    view full answer...
  • Tekonsha T-One Connector That Does Not Require a 12v Wire for 2022 Honda Palisade
    I know exactly what you need and for the 2022 Hyundai Palisade, Tekonsha has a wiring harness that does not require you to run a wire up to your battery. It is the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector item # 118784. The T-One connector plugs directly into your existing wiring, requiring no cutting, splicing, or tapping. I have linked a couple videos.
    view full answer...
  • Trailer Wiring Recommendation for 2022 Hyundai Santa Fe
    For your 2022 Hyundai Santa Fe the trailer wiring kit I recommend is the Tekonsha # 118784 which is the easiest to install and has the most reliable converter box. I attached an install video for this for you to check out as well.
    view full answer...
  • 4-way Wiring Harness for a 2022 Kia Telluride to Power Lights on a Cargo Carrier
    The T-One Vehicle Wiring Harness # 118784 is confirmed to fit your 2022 Kia Telluride and will provide you with the 4-way flat connector that you are needing to power the lights on your cargo carrier. The custom-fit T-One connector plugs into your vehicle's wiring harness, which is located behind the driver's-side interior trim panel in your rear cargo area. Once installation is complete, the 4-way flat connector will be stowed in an out-of-the-way location within your cargo area.
    view full answer...
  • Trailer Wiring Harness For A 2022 Hyundai Santa Cruz With Factory Tow Package
    We have the perfect trailer wiring harness that is confirmed for your 2022 Hyundai Santa Cruz! The T-One Vehicle Wiring Harness # 118784 will provide you with a 4-flat connector and make it to where your trailer's stop, turn, and taillights will mirror your vehicle's stop, turn, and taillights. The wiring harness will plug into your vehicle's wiring harness, which is located behind the driver's-side interior trim panel in your rear cargo area. I attached an installation video link below.
    view full answer...
  • Trailer Wiring Harness Recommendation for 2019 Hyundai Santa Fe
    The wiring harness I recommend for your 2019 Hyundai Santa Fe is the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118784 because it is easy to install; you will only need to plug it into a connection point under your '19 Santa Fe, which is under the car, behind the bumper on the driver's side. Additionally, the harness manufacturer, Tekonsha, has a very strong reputation for creating quality wiring products and we have consistently found them to be highly reliable....
    view full answer...
  • Parts Needed to Install a 5-Way on a 2020 Kia Telluride
    To install a 5-way on your 2020 Kia Telluride the first thing you need to install is the 4-way kit part # 118784 which install easily to a port on our vehicle and then install the # 20036 to convert it to a 5-way and you'd be set. This requires tapping into the reverse light circuit of your tow vehicle. I attached an install video for this for you to check out as well.
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  • 7-Way Trailer Wiring Recommendation for 2021 Hyundai Palisade for Trailer with Surge Brakes
    To install a 7-way on your 2021 Hyundai Palisade with an active reverse light circuit you'll need to first install a 4-way like the part # 118784 and then convert it to a 7-way with the part # 37185. From there you'd need to connect the reverse light circuit wire of the 7-way (purple wire) to the reverse light circuit of the vehicle and you'd be set.
    view full answer...
  • Parts Needed to Add 4-Way and 7-Way to 2021 Hyundai Palisade SEL
    To convert the 4-way # 118784 of your 2021 Hyundai Palisade to a 7-way and 4-way the easiest kit for this is the part # 37185 which would plug right into the 4-way of the vehicle and give you both a 7-way and 4-way at the rear of it. This comes with a mounting bracket as well.
    view full answer...
  • Best 4-way Flat Wiring for a 2022 Hyundai Palisade
    The 4-way wiring harness that I recommend for your 2022 Hyundai Palisade is going to be the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118784. This is going to be one of the easier installations. The T-One connector plugs into your vehicle's wiring harness, which is located behind the driver's-side interior trim panel in your rear cargo area. Once installation is complete, the 4-way flat connector will be stowed in an out-of-the-way location within your cargo area....
    view full answer...
  • Recommended 4-way Wiring Harness for a 2022 Kia Telluride
    The wiring I recommend for your 2022 Kia Telluride is the T-One Vehicle Wiring Harness # 118784. This will provide you with the 4-way wiring connector you are needing and will require no cutting, splicing or tapping for installation. I have attached a video that goes over the installation of this wiring harness. If you are needing a ball mount you can pick up the etrailer Ball Mount Kit # 989900. This will provide you with 2 different ball mounts, 2 different hitch balls, 2 pin and clips...
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  • Recommended Trailer Wiring Harness For A 2023 Hyundai Santa Fe
    When installing a trailer wiring harness onto your 2023 Hyundai Santa Fe I recommend The T-One Vehicle Wiring Harness # 118784. The T-One harness has a more reliable converter box and will last longer than the opposing Curt version. The wires that are on the T-One harness are also constructed of a 16-gauge bonded wire which will be stronger than the Curt's wiring and will have a longer working life. The T-One harness plugs into your vehicle's wiring harness which is located behind the...
    view full answer...
  • Class III Hitch with 2-Inch Receiver for 2019 Hyundai Santa Fe Ultimate Turbo
    We do show a confirmed hitch fit for the 2019 Hyundai Santa Fe, the 2-inch Curt Class III hitch # C13195. This hitch fits the 2019 Santa Fe models SE, Limited, SEL Plus, SEL and Ultimate.
    view full answer...


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