Locate the trailer light wiring plug: The trailer light wiring plug is usually located near the rear of the vehicle, behind the bumper. It is a round or rectangular connector with several wires.
Prepare the trailer light harness: If you are using a plug-and-play harness, it should come with all the necessary connectors. If you are using a universal harness, you will need to strip the ends of the wires and connect them to the appropriate wires on the trailer light wiring plug.
Connect the trailer light harness to the vehicle: Match the wires from the trailer light harness to the corresponding wires on the trailer light wiring plug. Typically, the colors of the wires will match. Connect the wires by twisting them together and wrapping them with electrical tape.
Test the trailer lights: Once the trailer light harness is connected, turn on the vehicle's headlights and brake lights. The trailer lights should light up accordingly. If they do not, check the connections to make sure they are secure.
Additional notes:
* If your vehicle does not have a trailer light wiring plug, you will need to install one. This is a relatively simple process that can be done with basic tools.
* Some trailer light harnesses may require additional wiring, such as a relay or fuse. Be sure to follow the instructions that came with your harness.
* If you are unsure about how to hook up a trailer light harness, consult with a qualified mechanic.
