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Getting your trailer lights working doesn’t have to mean cutting into your car’s wiring. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs straight into the existing taillight connections. It’s a plug-in setup that keeps your factory wiring intact and ready to tow without the guesswork.
Some vehicles can’t handle the extra load from trailer lights. This harness includes a powered converter that connects directly to the vehicle battery. It supplies power to the trailer’s lighting circuits so they work reliably and don’t overload the car’s system.
Once installed, the 4-flat connector gives you everything you need for running, turn, and brake lights. It’s the standard hookup for most small trailers, so you can tow safely and stay visible on the road.
The harness includes a dedicated power wire that runs to the battery. There isn’t just one way to route it—you can choose the path that fits your vehicle best, whether it’s through factory grommets or along existing wiring paths. The flexibility makes it easier to finish the job cleanly and securely.
Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
Ratings & Reviews
Very easy to wire with the exception of routing the wire from the battery to the rear of the car.
Super fast shipping excellent product up to date notifications extremely happy with product highly recommended
The kit is great! Had to run a power wire back from the battery in my Dart to the transformer in trunk which was the harder part. They already have car specific instructions for installing the T-wire kit, but would be better if they updated their instructions of running the power wire.
This trailer wiring harness was a breeze to install, and works very well. I would happy to refer friends to this site.
Trailer hitch and wiring harness very nice condition had all the necessary parts to install very easy this was on a 2014 Dodge dart to install hitch took about 30 minutes
Do you have a question about this Custom Fit Vehicle Wiring?
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Jenny N.
4/12/2022
It can be tricky to route the power wire to the battery. We do have a FAQ that gives great tips.
Helpful Links
faq-Routing-a-Power-Wire.aspx