STANDARD FLAT 7 PIN TRAILER WIRING DIAGRAM
Australian Trailer Plug and Socket Pinout Wiring 7 pin
I used a small 7 pin round for 10 years, and then after replacing the plug multiple times changed to 7 pin flat for the last 15 years, and I have never had a problem with a flat connector. I had one vehicle with a 12 pin socket and a trailer with a 7 pin connector and they played happily for years. Why is it more reliable?
Trailer Wiring Diagrams | etrailer
Standard 4-Pole Wiring Harness - For use with vehicles that have adequate power and standard wiring system, these simply connect into existing wires on the vehicle and have a 4-pole flat connector to attach a trailer. Converter - For use with vehicles that have separate turn and brake light wires.
Narva | Trailer Plug Wiring Guide
A colour coded trailer plug wiring guide to help you require your plugs and sockets. Includes guides for 7 pin, 6pin, 5 pin, 12 pin, 13 pin, pin and heavy duty round plugs and sockets.
Trailer Wiring Diagram – Lights, Brakes, Routing, Wires
In the Trailer Wiring Diagram and Connector Application Chart below, use the first 5 pins, and ignore the rest. 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.