Boat Trailer Plug Wiring Diagram. The four wires control the turn signals brake lights and taillights or running lights. Well walk you through the wiring process--its easier than you think.
The red and blue wire can be used for brake control or auxiliary. To assist with the installation of trailer Plugs Sockets below are some easy to follow diagrams covering a complete range of connector types. Australian Trailer Plug and Socket Wiring Diagrams.
If your truck has a built-in 7-pin socket but you only need 5 of the pins.
Boat Trailer Wiring Diagram. 12 Pin Flat This is an extension of the 7 pin flat. Below is the generic schematic of how the wiring goes. The 7 pin flat plug will fit into a 12 pin flat socket and work perfectly.