Reiser Trailer 7 Pin Wiring Diagram. Trailer plug wiring is standardized across all vehicles, no point trying to find vehicle specific info. Regardless of wire color, the pin position for function is pretty standard.
I found a diagram on the web (see attached), but can't tell if the diagram is from the front or rear of the connector - ie if you unplugged it at looked at the. Trailer Wiring Diagrams for Single Axle Trailers and Tandem Axle Trailers. It gets complicated when you have trailers with more cables, and in this case, you need an adapter to make the connections.
These are the type of plugs used on car trailers and caravans.
Trailer Wiring Diagrams for Single Axle Trailers and Tandem Axle Trailers.
Wired as per diagram - no joy. This is the style we recommend. I hooked up to my trailer for the first time yesterday and no electric brakes.