Brown Wire On Trailer Lights. The trailer wiring diagram shows this wire going to all the lights and brakes. This project requires a trailer lighting kit that includes a wiring harness, small connection Side marker lights are powered by the brown wire.
Trailer lighting, turn signals and brake lights inform other drivers of your intentions. Connect the trailer plug to the socket on the tow vehicle and test the lights. The standard trailer plug and socket design is a color coded system using four wires.
This project requires a trailer lighting kit that includes a wiring harness, small connection Side marker lights are powered by the brown wire.
Even small trailers like this one for towing motorcycles need to be wired to your vehicle.
Before connecting each wire slide an appropriately sized piece of heat shrink over each wire. The harness wires I originally chose seemed to work OK and I did test drives at night with good results. If you wired everything correctly, the trailer lights should be fully functional.