12N and 12S Caravan & Trailer Wiring Charts

from Western Towing – www.westerntowing.co.uk

12N (Normal) Socket & Plug Wiring

Pin No. Function 7 core wire colour
1 Left Hand Indicator Yellow
2 Rear fog light(s) Blue
3 Earth White
4 Right Hand Indicator Green
5 Right Hand Side lights, marker lights & number plate light Brown
6 Brake lights Red
7 Left Hand Side lights, marker lights & number plate light Black

 

 

12S (Supplementary) Socket & Plug Wiring

Pin No. Function 7 core wire colour
1 Reverse Light Yellow
2 Positive Ignition key on (Battery Charging) Blue
3 Earth White
4 Positive direct from battery Green
5 Reverse Sensor (Optional) usually spare Brown
6 Positive Ignition key on (Fridge) Red
7 Earth return for Fridge (Terminal 6) Black
Erde Trailers, trailer spares & accessories
Rhino Roof Bars, pipe tubes & Racks
Witter Towbars
Milenco trailer & Caravan security
Thule cycle carriers, roof boxes & roof bars
Al-ko Axles, couplings, caravan & trailers bakes parts
Westfalia Towbars logo
Towtrust fixed & detachable Towbars
Knott Avonride caravan & Trailer brakes & couplings
Indespension trailers, trailer parts & spares
Bulldog trailer & caravan wheelclamps & Coupling locks