7 Wire Trailer Diagram. All makes and models are designed differently, so you'll need to have a service or repair. That said, for specific situations, there are industrial standards with different connectors and wire arrangements.
Our trailer wiring diagram is a colour coded guide designed to help you wire your trailer plug or socket. It shows the components of the circuit as simplified shapes, and the gift and signal friends in the middle of the devices. BTW, the wire colors on your truck or trailer could vary from the colors shown in the diagrams.
I looked all over TW and Google trying to find out which colored wires performed which function.
Here's the wiring diagrams showing the pin out for the plug and socket for the most common circle and rectangle trailer connections in use in Australia.
We recommend these standards because they are pretty universal. There is a lot wiring that you have to tie into your truck's wiring harness, but it is easier to do than it seems. The following trailer wiring diagram(s) and explanations are a cross between an electrical schematic and wiring on a trailer.