3 Wire Trailer Light Plug Diagram. The four wires control the turn signals brake lights and taillights or running lights. Use on a small motorcycle trailer snowmobile trailer or utility trailer.
The red and blue wire can be used for brake control or auxiliary. As the name implies they use four wires to carry out the vital lighting functions. When you employ your finger or the actual circuit along with your eyes it s easy to mistrace the circuit.
They also provide a wire for a ground connection.
They also provide a wire for a ground connection. When you employ your finger or the actual circuit along with your eyes it s easy to mistrace the circuit. The rest you can ignore. The red and blue wire can be used for brake control or auxiliary.
