9 Pin Trailer Plug Wiring. This is a basic reference article about trailer and caravan wiring; the plugs and sockets that are commonly in use in Australia, and the pin colour codes that are designed to coordinate proper connections, according to Australian Standards. So here I have an older trailer which needed some work, along with re-wiring the lights.
This is how you would wire up a trailer wiring plug to your XJ for towing purposes. 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. If the trailer plug and socket are correctly wired up and connected to the vehicle, then the lights on the vehicle would also not be working if a fuse was blown.
Type: A plug style will connect directly into your fitting with no additional wires.
Video tutorial on how to wire trailer lights.
So here I have an older trailer which needed some work, along with re-wiring the lights. Some connectors will also contain wires that can extend the cable length between the trailer and your vehicle. The original wiring on my boat trailer was damaged and installed incorrectly by the previous owner.