5 Wire Flat Trailer Plug Diagram. Trailer wiring can be difficult to get your head around. 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.
The most common flat wire material is metal. The trailer brakes work fine, but all the lights do not come on. If you split the flat wire and carefully strip it you should see a black (or red) wire (right) with bare copper (or green) which is ground and a white or blue wire (left) with ground as well.
The trailer brakes work fine, but all the lights do not come on.
This page has wire diagrams for many electric options including wires for trailer lights, brakes, alt power and connectors.
On alot of the trailer plug kits, they have pics and diagrams in the package. Australian Plug and Socket Wiring Diagrams. If you're towing just for the day and don't ever plan to tow again Not surprisingly, the standard flat-style connector for trailers uses four pins, with one unshrouded male.