Description

The 12S connector on a car or towing vehicle supplies the supplementary power required by the caravan/trailer reversing lights, interior lights, battery charger and fridge.

There is a socket on the vehicle and a plug on the caravan/trailer.

The 12s cable is seven core with a grey outer sheath.

The seven wires should be around 1.5mm² with a larger white earth wire at 2.5mm².