4 pin trailer wiring diagram. Below is the generic schematic of how the wiring goes.

Trailer Wiring Diagram Lights Brakes Routing Wires
Wiring diagram for a trailer plug. If your vehicle is not equipped with a working trailer wiring harness there are a number of different solutions to provide the perfect fit for your specific vehicle. There is a noticeably larger gap between 1 and 6 on this plug though some trailer places rotate this connector that the yellow is at the top. Plug size is similar to an australian 10c coin. Trailer wiring diagram wiring diagrams for trailers international 1 989 755 0561 toll free 1 800 358 4751 covid 19. Complete with a color coded trailer wiring diagram for each plug type this guide walks through various trailer wiring installation solution including custom wiring splice in wiring and replacement wiring. Socket and plug are keyed.
All diagrams are as viewed from the cable side. Use this handy trailer wiring diagram for a quick reference for various electrical connections for trailers. In the trailer wiring diagram and connector application chart below use the first 5 pins and ignore the rest. To connect the electric system of your trailer to the vehicle you will be using special connector. Trailer wiring diagrams trailer wiring connectors. If your truck has a built in 7 pin socket but you only need 5 of the pins.
Use the 7 pin connector anyway see below and just leave out the last 2 wires. Above we have describes the main types of trailer wiring diagrams. Large 7 pin round vic. Various connectors are available from four to seven pins that allow for the transfer of power for the lighting as well as auxiliary functions such as an electric trailer brake controller backup lights or a 12v power supply for a winch or interior trailer lights.