7 Pin Lighting Connections (12N)
Trailer lights in the UK are normallly connected using a 7 pin plug and socket known as a 12N using a black cable. If you look at a socket or plug you should be able to see the pin lables (1-7).
In some cases and more often in Europe the trailer light will be connected using a 13 pin plug and socket. If you have a 13 pin socket fitted to your vehicle we have an adaptor to plug in so you can use a normal 7 pin plug.
The table below with the diagram explain the connections used on a 7 pin setup.
| Pin | Wire Colour | Function |
| 1 | Yellow | L/H Direction Indicator |
| 2 | Blue | Rear Fog Lamps |
| 3 | White | Earth Return |
| 4 | Green | R/H Direction Indicator |
| 5 | Brown | R/H Tail & No. Plate Lamp |
| 6 | Red | Stop Lamps |
| 7 | Black | L/H Tail & No. Plate Lamp |
Notes for 12N Wiring
Number plate lights on the trailer should be wired to avoid common contact between pins 5 & 7 of the 12N socket.
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