To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
Wiring a trailer doesn’t have to mean cutting into factory wires. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly into existing tail light connections, so installation stays simple and clean. The connectors match factory plugs for a secure fit and quick setup—no splicing or guesswork required.
This harness is designed to store inside the rear cargo area when not in use. When you need it, just pull the 4-flat out across the hatch seal. The thick weather-stripping cushions the wire, keeping it safe from pinching or damage. Because it stays inside the vehicle between tows, the connector avoids corrosion and road debris that can affect wiring left exposed under the bumper.
A powered converter isolates the trailer lighting circuit from the vehicle wiring. That means your trailer lights get consistent power for running lights, turn signals, and brake lights without overloading or interfering with the vehicle’s electrical system. It delivers steady performance so your trailer lighting stays bright and dependable.
When you’re ready to tow a trailer with brakes or need a 12-volt charge line, this harness pairs with a universal install kit to add a 7-way connector. The combination makes it simple to step up from basic lighting to full trailer control without redoing your existing wiring.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
Jenny N.
2/28/2024
Oh no! I will have our Customer Service team reach out to you so that we can have the missing part replaced.
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.
Paul
9/8/2025
We have only used the wiring twice since installation. It has done what it is supposed to do. There is a little pinching where the tailgate closes on it. But so far... so good!