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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.
Features:
Specs:
Installation
This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located in your rear cargo area, behind the driver's-side and passenger's-side tail lights. You will have to remove the tail light assemblies and some interior paneling 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 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 plugs 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 your vehicle runs on a multiplex wiring system, the wiring needs to be converted to be 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.
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Installed this on our 2023 Sportage LX hybrid. Install overall was pretty smooth - just watch some videos and take your time. Running a long the bottom of the car wasn't too bad. I had done this one before with our Sienna minivan and this one was easier just by having a few extra inches of clearance. A lot of the install videos will suggests places to run the wires, but I found this one overall to be easier than our van. Hooking it into the battery was weird because the hybrid hookups were different from a normal battery. I ran it to the post at the front of the fuse box and that's been working great. It was a tight fit since the plastic cover doesn't leave much space there. In the back I mounted it to a little bracket on the hitch receiver. On our van I just left it loose in the back of the car and I like the mounted solution MUCH better. Overall, no problems with this kit and no issues during install.
This is the correct product for a 2024 Kia Sportage Hybrid EX. Install was similar to the video for the Curt kit, but this one has correct-length wires to the right light (so you don't have to splice in extra wire, as shown on the video). Also, when you get the power wire up to the engine - there is no 12V battery - you are going into the fuse box - there is a positive pole in there (with a bolt that's pretty similar to what's shown on the video). Final bit of advice is to take out the two forward-most bolts on that ~5-foot cover that runs from the front wheels to the back wheels under the driver's side (you need it loose so you can bend it down in the front & feed your wire-puller through to the back; you need a 10 mm socket).
Nice kit, worth the extra cost to have all the plug and play connectors for the lights. Running the power wire takes a bit of time but we’ll worth it for properly functioning lights. I added shrink wrap on the supplied connectors to eliminate any issues years down the road.
je pense que la couette ne convient pas au sportage 2026, le clignotant a droite fait allumer les deux côtés et à gauche aucun allume
Mike L.
8/14/2025
It sounds like you have a ground problem. Make sure the white ground wire is securely attached to clean bare metal on the vehicle chassis. Also, check all the grounds on the trailer, including the main ground on the trailer frame and the ground for each trailer lamp.
Nice wiring harness with good instructions which made for clean and easy installation
At first I received a kit for my KIA Sportage that I would have to splice into my taillight wiring. I returned it for wiring I could just plug into the tail lights. The kit worked perfectly. The hardest part was removing the taillights from the car.
This wiring harness was an easy plug and play installation on my 2025 Kia Sportage Plug-in Hybrid.
Well assembled
Mr Race was the best really knowledgeable super helpful.
Easy to install but still have to run a wire up to the front of the vehicle
This kit fit perfectly and works fine. The install was pretty straight forward and did not take too long. I have a plug-in hybrid, so the battery pictures didn't match my car, but it was easy to get around it.
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Chuck
5/9/2025
Still working perfectly after a year.