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.
Hooking up trailer wiring can be messy, but this harness keeps things simple. The Curt T-Connector plugs directly into the tail light connectors, so there’s no cutting or splicing wires. The plug-and-lead design hides neatly behind trim panels, giving a clean install that looks factory once it’s done.
Once connected, the built-in 4-pole flat connector powers your trailer’s running lights, turn signals, and brake lights. It’s the standard setup for small and mid-size trailers and works with add-on kits like the ETBC7 if you ever need a 7-way connection for trailer brakes or 12V power later on.
Modern vehicles use sensitive electronics, and direct splicing can cause problems. This harness includes a powered converter that isolates the trailer circuit from the vehicle’s wiring, helping prevent overloads or faults. It’s designed for vehicles without a factory tow package and keeps everything working safely and smoothly.
LED lighting is becoming standard on newer trailers, and this harness is built to handle it. It’s fully compatible with LED taillights, and when grounded properly to a clean metal surface, it delivers steady performance even when headlights or running lights are on. That means no flickering lights or weak signals—just consistent power every time you tow.

Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews

Chris J.
6/17/2016
Works great, fits vehicle perfectly.
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.







Gregory
8/1/2025
Perfect! Harness is working flawlessly.