4 Pin Flat Trailer Plug Wiring Diagram. It is the 4 pin connector. The black sometimes red 12v and blue electric brakes wire may need to be reversed to suit the trailer.
Yellow and green are for left and right turns and braking. Start by cutting the white wire and attaching it to the trailer frame. Round 1 1 4 diameter metal connector allows 1 or 2 additional wiring and lighting functions such as back up lights auxiliary 12v power or electric brakes.
It is the 4 pin connector.
At a minimum all trailers need at least 4 functions. The most common 4 wire connector is the 4 pin flat connector as shown here. It is the 4 pin connector. This article will be discussing 4 flat trailer wiring diagram.
