The red and blue wire can be used for brake control or auxiliary. 4 way trailer connectors are.
Trailer Wiring Diagrams Johnson Trailer Co
Utility trailer light wiring diagram. 4 pin this is one of the better videos we have come across that shows how to wire the tail lights on a utility trailer with a 4 way trailer wire connection. As the name implies they use four wires to carry out the vital lighting functions. Diagram 1 shows a traditional wiring layout with jumper wires to provide running light functions for both sides of the trailer and diagram 2 shows a wishbone harness. 4 way trailer connectors are typically used on small trailers such as boat snowmobile utility and other trailers that that do not use brakes. They also provide a wire for a ground connection. The four wires control the turn signals brake lights and taillights or running lights.
5 way trailer wiring diagram allows basic hookup of the trailer and allows using 3 main lighting functions and 1 extra function that depends on the vehicle. Use on a small motorcycle trailer snowmobile trailer or utility trailer. The trailer wiring diagram shows this wire going to all the lights and brakes. Also it must connect with things if included that use the aux power and back up lights too. Can also be used as custom wiring on trailers with 3 lightwire systems. 7 pin this is an excellent in depth video on how to wire a 7 way round trailer plug that includes wiring diagrams.
5 wire trailer wiring diagram. Diagram 2 is the preferred method and it is more common on newer trailers and new tail light kits. Some trailer builders just connect this wire to the frame then connect the ground from all the other lights and accessories to the frame as well. 34 inch by 1 inch 6 way rectangle connectors right turn signal green left turn signal yellow taillight brown ground white. An extra pin allows using another extra function. The wishbone harness has two running light wires one for each side of the trailer.
Gallery of Utility Trailer Light Wiring Diagram
