Truck Trailer Wiring Harness

Truck Trailer Wiring Harness. Without the connection, you're at risk for an accident or traffic ticket. I need to find out what wires control what lights.

GM Truck Electric Trailer Brake Control Wire Harness. (Eugene Guzman)

Taillights are activated by turning on the vehicle's parking lights. Splice the white wire of the trailer harness to the black wire connected directly to the steel frame of the truck chassis. To legally tow a trailer, vehicles must be wired for trailer lights.

On my truck, not only was the trailer wiring bad, but the wiring on my truck was out too.

I need to find out what wires control what lights.

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It is an easy installation that that shouldn't take you more than an hour to finish. When you decide to tow a trailer, you need to a install a trailer wiring harness to connect your truck's brake lights to those of the trailer. If your vehicle is not equipped with a working trailer wiring harness, there are a number of different solutions to provide the perfect fit for.