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 |
Featured Trailer & Caravan Parts
