4 Pin Trailer Light Diagram. Following the standard method for wiring a trailer connector is vital to the safety of your vehicle while towing. This 5 pin trailer wiring diagram is good for trailer.
Same as 4 way system listed above but adds a extra blue wire for brake. You must check the trailer manual to see if the wiring is correct but normally the white wire is called the ground wire while the brown wire is used for tail lights. You will need to find what functions the red and black wires on the new light are supposed to carry.
The 4 pin trailer uses yellow brown green and white wires.
4 pin trailer wiring diagram elegant wiring diagram collection. 10 4 pin trailer diagram. They also provide a wire for a ground connection. White ground see white wire notes below 2.