The best way to do this is to look up the tow bar model online and find the official wiring diagram from the manufacturer. Once you have the correct wiring diagram in hand, you can begin to wire up the tow bar. This process typically involves connecting the wiring harnesses from the tow bar to the car's electrical system.. Towbar Wiring. Socket and plug wiring instruction. 12N Normal Socket. Left indicator; Fog; Earth; Right indicator; Right side light; Brake; Left side light; 12S Supplementary Socket. Reverse; Battery Charge ** Earth; Power feed; Spare; Fridge ** Earth for pin 6 (1998 on) **NB It is essential that pin 6 is wired through a split relay from 1998 on!!
The tow bar wiring diagram is a useful tool that will guide you through the process of connecting your car's electrical system to the trailer's lights. This diagram will show you the specific wire color codes and connections for your car's lighting functions, such as turn signals, brake lights, and tail lights.. There have been several variations in the wiring standards used for towcars and caravans over the years. Which socket you need depends mainly on the age of the caravan you are planning to tow, and to some extent on where the caravan was made:- Caravan built before 1 October 1979 - Towcar needs a single 12N seven pin socket.