Caravan Towing Wiring Diagram. This does two things it protects the caravans 12 volt electrical system if there is an overload or fault the second thing is does is protect the caravan wiring from damage if the habitation relay should fail and you start the tow vehicles engine with the caravan connected. To help you understand how 7 pin towbar wiring works our helpful diagram will help you visualise how the functions connect with towbar wiring colours.
The tow hitch of the van or trailer must be on the tow bar of the vehicle so as to create an efficient earth connection. This has now been replaced by 13 pin euro plugs on all new caravans. Lights wiring diagrams the 7 pin n type plug and socket is still the most common connector for towing.
There have been several variations in the wiring standards used for towcars and caravans over the years.
It is recommended that a split charge relay should be wired into your s type caravan wiring. This does two things it protects the caravans 12 volt electrical system if there is an overload or fault the second thing is does is protect the caravan wiring from damage if the habitation relay should fail and you start the tow vehicles engine with the caravan connected. 12n normal electrics wiring diagram for the exterior lighting on a trailer or caravan from western towing. Wiring diagram for a 12s tow bar socket and plug the 12s connector on your car provides power to the caravans reversing lights interior lights battery charger and fridge.