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Wiring a trailer can be tricky when factory wires are buried behind trim. This Curt T-Connector harness makes the job clean and simple with its plug-in connectors. It ties into your vehicle’s existing wiring through matching plugs, so you don’t have to cut or splice a single wire. Just snap the connectors in place and you’re ready to hook up your trailer lights.
Many vehicles have separate brake and turn-signal circuits, but trailer wiring combines those signals. The included converter takes care of that automatically. It merges the brake and turn lights into a single circuit so your trailer lights work exactly as they should, with no extra adapters or guesswork.
The harness mounts behind interior panels and trim, staying protected from the elements and out of view. You get a clean, factory-style setup with no loose wires hanging under the bumper. Everything tucks neatly away once the 4-flat connector is in place.
At the end of the harness is a standard 4-flat trailer connector that supplies running lights, turn signals, and brake lights. It’s the common plug style for small and mid-size trailers, giving you a dependable connection every time you tow.

Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
Ratings & Reviews

Robert
8/18/2025
Harness was relatively easy to install. The only trouble was due to my vehicles small access hatch over the taillight plugs. Harness has been working great and was of great quality.
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Jerry G.
5/29/2019
Working very well, no issues