Pin No	Conductor Colour	Function
Pin 1	Yellow	LH Indicator
Pin 2	Blue	Rear Fog Lamp
Pin 3	White	Common Return (Earth)
Pin 4	Green	RH Indicator
Pin 5	Brown	RH Side Tail
Pin 6	Red	Brake Lights
Pin 7	Black	LH Side Tail	Caravan Plug as viewed from rear (cable end)

The 12N plug is the black one and is used for all road lights except the reversing light