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.
Running trailer wiring can be a pain when you have to dig into factory wires. This Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector skips that step. It plugs straight into the factory connection point behind the driver-side trim panel so you don’t have to cut or splice a single wire. Once connected, the harness gives you a clean, tucked-away setup that looks factory-installed.
The 4-pole flat connector supplies the basic lighting functions—running lights, turn signals, and brake lights—needed for safe towing. It’s the common standard used on most small trailers, so once installed you can hook up and go without special adapters or rewiring.
If later on you need to run a brake controller or charge a trailer battery, the 4-way plug from this harness is the starting point. Add a brake controller install kit and 7-way adapter (like part # ETBC7) to convert it to a full 7-pole system without replacing anything you’ve already done.
Finding where to connect can be confusing, but this harness is designed for simple access points. The plug locations are behind the driver-side rear trim or under the cargo floor, so you can reach them without running wires through the whole vehicle. Once found, just separate the factory halves and insert the T-connector in between—it’s that straightforward.
Customer Satisfaction Score:
92% were satisfied with this product
8% of customers were not satisfied
Ratings & Reviews
Ed
9/14/2016
Still working as good as the first day it was installed.
Fran
5/31/2017
Just installed it, had an open plug ready to go was working in 10 minuites. Checked ut fine.
Bruce L.
5/4/2016
Great product easy to install
Jim R.
6/16/2021
Good
Knut
6/3/2016
It functions perfectly, just as the day I installed it. I am and will remain a loyal customer.
Greg H.
6/24/2015
still working like a champ. Thank you
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.
Leo B.
6/3/2018
After a year, no issues with the harness.