12N 7pin Trailer & Caravan Lighting Wiring Diagram

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 caravn plug.

 

Diagram

 

Terminal Number Function7 core wire colour
1Indicator LeftYellow
2Rear fog lightBlue
3EarthWhite
4Indicator RightGreen
5Side lights, marker lights & number plate light RightBrown
6Brake lightsRed
7Side lights, marker lights & number plate light LeftBlack