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Wiring up trailer lights doesn’t have to mean tracking down and cutting into factory wires. The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector plugs directly into the tail light connections using factory-style connectors. It’s a simple plug-and-play setup that keeps everything neat and reversible with no wire splicing required.
This harness gives you a standard 4-flat trailer connector that powers running lights, turn signals, and brake lights. It’s the common connection used for small utility trailers, campers, and boat trailers. Once connected, you’ll have reliable lighting communication between your vehicle and trailer for safe on-road visibility.
The built-in powered converter helps isolate and protect sensitive vehicle wiring from trailer current draw. It pulls power directly from the battery through a fused line, so the trailer lights get full power without straining the vehicle circuits. This design helps prevent lighting faults or blown fuses during towing.
There’s no special equipment required to install this harness—just basic tools and access to the tail light area. The connectors snap securely in place, and the included power wire routes up to the battery. Most folks can complete the job on the ground in their own driveway without any hassle.

This will not affect how the tail lights on your vehicle operate.
Customer Satisfaction Score:
79% were satisfied with this product
21% of customers were not satisfied
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Arnold
7/7/2023
Great