7 Pin Lighting Connections (12N)

Trailer lights in the UK are normallly connected using a 7 pin plug and socket known as 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 on the right explains 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.