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.
| 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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