7 Pin Large Round Trailer Socket (Female) -Plastic and Metal

Pin NO.            Colour            Circuit           

1                      Yellow              Left Hand Indicator    

2                      Black               Reversing Signal

3                      White              Earth (Negative)

4                      Green              Right Hand Indicator

5                      Blue                 Service ( spare )

6                      Red                  Stop/ Brake Light

7                      Brown              Tail Light/ Rear Lamp