Trailer Wiring Diagram 13 Way. The 7 pin flat plug will fit into a 12 pin flat socket and work perfectly. Pins 2 and 5 are not used on our standard range of trailers.
Standard trailer plug diagram. 7 way trailer wiring diagram with brakes. 12 pin flat this is an extension of the 7 pin flat.
Basically this is a way of applying the trailer brakes if the trailer comes disconnected from the tow vehicle.
These are the most modern style of trailer electrics all eu caravans post 2008 are fitted with 13 pin electrics as standard. You should really also attach the white wire to a appropriate grounding point. 12v 13 pin wiring diagram. Australian trailer plug and socket wiring diagrams.