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Adding trailer wiring can be a hassle if you have to trace wires or make your own connections. The Curt T-Connector Vehicle Wiring Harness for Factory Tow Package takes that out of the equation. It plugs right into the existing factory ports behind the rear bumper and cargo panel. No wire cutting, no splicing—just plug it in and it’s ready to go.
This harness gives you a standard 4-pole flat trailer connector, providing running light, turn signal, and brake light functions. It’s the basic connection that most small and mid-size trailers need, and it’s set up so you can hook up and tow with confidence.
Vehicles often have separate circuits for turn and brake lights, while most trailers combine them. The included powered converter fixes that by combining the signals so your trailer lights work properly every time. It also safeguards the vehicle’s wiring from overloads when connecting to the trailer.
Designed for vehicles equipped with a factory tow package, this harness uses existing connectors both behind the bumper and in the rear cargo area. The result is a neat, hidden setup with wiring that stays tucked away and protected from the elements.
Customer Satisfaction Score:
96% were satisfied with this product
4% of customers were not satisfied
Ratings & Reviews
Gwendolyn Y.
7/2/2025
That sounds like an awesome trip you had! What areas/places did you travel through?
Richie B.
2/11/2017
It s been about a year, and the harness is still working awesomely! I have zero complaints! Thanks e-trailer.com!
Chris K.
11/30/2018
Working flawlessly!
Victoria B.
10/25/2019
Because 4-Pole installation can vary, Curt does not include a mounting bracket with most of their wiring harnesses. Curt does offer a mounting bracket with part # C58303.
Helpful Links
Wilder F.
7/8/2016
Still very pleased!
Richard W.
3/20/2018
After one year of service my wiring harness is still working perfectly.
Keith
9/14/2021
Excellent product. Still going strong
Mark C.
8/5/2016
I have never had any problems with the product. Thanks for the follow-up.
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Bob G.
3/17/2020
Perfectly. My portable trailer lights work correctly one year after I installed the wiring harness