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12N 7pin Trailer & Caravan Lighting Wiring Diagram

from Western Towing – www.westerntowing.co.uk

This is the standard UK wiring of a the normal socket and plug otherwise known as 12N. The diagram below shows the view from outside the vehicle socket (under the flap) and from inside the trailer or caravan plug.
 

Diagram

 

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