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This Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector makes wiring simple. It plugs directly into your vehicle’s existing tail light connectors, so there’s no need to cut or splice wires. The plug-in design keeps the factory wiring intact while giving you a reliable trailer lighting connection.

The included powered converter keeps your vehicle’s electrical system safe by drawing power straight from the battery instead of the tail light circuits. That prevents overloading and ensures the trailer lights get consistent power for running, turn, and brake signals. It’s a smart setup that delivers clean, steady lighting every time you tow.
The harness features a hidden design that tucks neatly behind trim panels and routes through existing openings for a clean finish. Once installed, only the 4-flat connector is visible, ready for use when you hook up your trailer. Everything else stays protected inside the vehicle away from road debris or moisture.
The 4-flat connector provides the essential lighting functions—running lights, turn signals, and brake lights—used on most small and midsize trailers. It’s a standard connection that’s easy to plug in and works with common trailer setups right out of the box.
Customer Satisfaction Score:
58% were satisfied with this product
42% of customers were not satisfied
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Ron B.
9/26/2014
One year later and everything works as it was when new.