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Tired of complicated wiring? Say goodbye to cutting, splicing, or tapping with the T-One Vehicle Wiring Harness. It plugs directly into your vehicle's existing wiring, making installation quick and stress-free. Just connect the plug, and you're good to go.
Worried about overloading your vehicle's electrical system? The built-in ModuLite Converter draws power straight from your battery, protecting your car's wiring. This ensures seamless compatibility between your vehicle's three-wire system and your trailer's two-wire system, with no extra burden on your tail light circuits.
This harness is custom-designed for a perfect fit, ensuring that it interfaces seamlessly with vehicles equipped with a factory towing package. Crafted for precision, it matches the specific contours and electrical needs of your vehicle.
Keeping electrical connections clean is crucial for longevity. A dust cap comes included to protect your 4-way flat connector from dirt and debris, ensuring reliable connections every time you tow.
Have multiple trailers? No problem. This wiring harness is compatible with 5-pole, 6-pole, and 7-pole adapters, giving you the flexibility to easily switch between different trailers without hassle.
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.
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.
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.
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The trailer hitch and wiring harness was as described. I was able to install both items myself after watching the installation videos. The items arrived on time and undamaged. I would purchase from this seller again. I had a question about my order and their customer service was able to take care of my issue without transferring me to other agents. Overall, I received excellent service.
Etrailer installed it, so I don't have anything to say about that. It works. Light come on and go off on the trailer when they are supposed to.
This hitch is great! I installed it myself with basic tools. The wiring harness made it easy.
Ben
12/29/2024
I tow a utility trailer often with the hitch. I’ve never had any issues with wiring. I live in FL so no rust either. I remember the customer service and online video made this a no brained.
Worked perfectly for my 2020 Santa Fe. Plug it in and route the harness to the hitch. Great product at a great price.
Have had the hitch for a year and use it regularly to tow my fishing boat (and several U-Haul trailers). Easy install from good instructions and it looks as good now was when first installed. The paint is not showing any wear.
Richard
7/9/2024
Another year later and the hitch still looks good with regular use towing my fishing boat.
Perfect hook up to my original wiring on my 2025 Santa Cruz. Very easy installation.
Quick delivery, arrived intact, nice to have the extras in a separate box.
Fitting went well, put vehicle up on ramps for more clearance.
One tip, once you have all bolts in, just run lowers in to pull hitch up to body, do not tighten, I did and there was a small gap between side plate on one side and wasn’t pulling up even with a lot of torque, loosened bottom bolt slightly and side torqued up nicely.
Bracket makes for a “factory” look.
Wiring was easy, made sure the control box was tied with wires facing down and tied it to factory plug which was above the hitch wiring plug.
Zip ties are too short to go around hitch, so get yourself a few longer ones to save joining.
Gary S.
4/15/2024
Still where I put it and no issues.
Everything went together exactly as was described.
Mark H.
4/27/2024
Very well as expected.
Looking at the online video showing a similar unit from U-haul...a metal clip that holds 4 way wiring connector was present and made it easier to support the unit. However, the unit I got from etrailer did not contain that clip. If this was a mistake, I would hope that clip is available.
Tyler M.
10/7/2020
Hi Chris, Thank you for your review. This wiring harness does not come with a mounting bracket. If you are looking to install one, I would recommend the Mounting Bracket 4-Pole Flat, product 18144. use the self tapping screws to attach it to the plastic bumper or the nuts and bolts to attach to the vehicle frame or metal bumper. If you do not want to screw into the bumper or frame, then I would recommend the 4-Flat Universal Mounting Bracket, product 118149. This one will come with zip ties that will secure the bracket to the hitch.
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I picked the Curt trailer hitch over the etrailer hitch because it sticks out further past the bumper. I have the Thule T2 Pro XL bike rack and wanted to make sure I have enough clearance between the bike rack and the back of my 2020 Hyundai Santa Fe. Even though, your video shows enough clearance (1 1/2 inches ) with the etrailer hitch, with the Thule T2 Pro XL bike rack on the 2020 Santa Fe, I wanted more clearance. With the Curt hitch installed I have 3 inches between the closest point on the bike rack and the back of the SUV.
The installation was straightforward and easy. We did use a lift which made it much easier than the previous installation I did laying on the ground under our Honda CR-V. For that SUV I got the etrailer Hitch.
I followed the instruction video for the wiring harness, and it was a simple installation.
Easier than video of installation. Locate the cars wiring harness, unplug ; then open and plug up new product with one snap, and secure wire line along installed mounted support to flat surface and stick-on square box. Then continue securing wire line on other side of hitch and finally mount any excess wire to hitch while leaving short piece free to serve as connecting 4 post receptor. Over and done with. Thanks for being true to your easy promise
I have been buying from them for years and their videos are awesome.
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!
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.
This trailer wiring kit was the exact match for the existing plug and play wiring underneath my 2020 Hyundai Palisade. However, you will need to order a separate bracket available at etrailer also to attach the trailer 4-pin connector plug to either the hitch or bumper fascia. I attached mine to the fascia pictured below.
The wiring harness was an exact match for my vehicle
Terry
5/27/2024
The wire harness was a perfect fit and has performed perfectly, it was easy to install and the directions were easy to follow.
It all worked great, your installation videos were what made it possible for me to install the hitch and wire harness on my 2023 Hyundai Tuscon. The hitch fit perfectly the bolt holes lined up. The hitch was flush with the care frame there was not a MM of space between the hitch and car frame (see pic's) Note the hitch shipping box was damaged and had a hole in. But the wire harness did not fall out (see pic's)
I've purchased two trailer hitches from etrailer, plus wiring harness, etc. What a great experience. The instructional videos are second to none. I wish all companies were as good as this one. Great price, awesome products, fast delivery, excellent customer service. What else can one ask for. Trust this company, they won't steer you wrong, and once they make a deal, there are no unexpected hitches! ;-)
Super fast delivery!! Great quality product. Love this company.
Couldn’t have been much easier. Remove the plastic cover under the left rear of the vehicle (3 push pins and 2 14mm plastic nuts), remove the cap on the factory harness, plug in the new harness and secure the wires as you see fit. There’s no instructions for wire storage or how to route them, but it’s very simple - use common sense - plenty of YouTubes.
Plug and play works well
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.
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.
Great purchasing experience! Love the do it yourself Videos! Makes installation very easy.
Bill
5/5/2024
This product has lived up to all expectations!!
This just arrived. But I know it’s the right one for my 2019 Santa Fe ultimate 2.4. It looks very high quality. Instructions look good. I know it’s easy to install as I already installed the hitch. So this will be a piece of cake. Thanks! Picture is where it attaches to the car harness.
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Jack
5/11/2025
Product is still functioning great after one year of being installed on my vehicle. I have had no issues with theses products.