Caravan Electric Wiring Diagram Trailer Plug

This is the standard uk wiring of a the normal socket and plug otherwise known as 12n.

Caravan electric wiring diagram trailer plug. There have been slight variations over the years as most newer caravans control the battery charging in the caravan rather than from the towing vehicle. The diagram below shows the view from outside the vehicle socket under the flap and from inside the trailer or caravan plug. For best results do not run battery charge lines or fridge power lines through a 7 pin or 12 pin plug. The 12 pin flat plug have a second row of 5 larger points which will accept up to 6mm auto cable.

Trailer plug wiring diagrams use the correct size cable for the plug socket most standard plugs will accept up to a 4mm auto cable easily. View our electrical wiring diagram guides for towbar fitting to power trailer lights and internal caravan electrics. However there is an important downside. The 12 pin plug can only take a 6mm diameter wire so it will not provide the charge of an anderson plug system.

A 12 pin plug is sometimes an alternative to an anderson plug if the caravanner wants just one electrical connection between car and van. This is the standard uk wiring of a the supplementary socket and plug otherwise known as 12s. Whilst coupling up the 13pin plug to the connector takes a bit of getting used to as it requires a twist connection it does offer a few advantages.