Feature Suitable for European standard trailer. Supplies power to your towing and truck. Converts the 13-pin socket on your car to the 7-pin female socket. Establishes a secure connection between your major vehicle and the additional trailer; Transfers the electronic lights from the vehicle to trailer. Weather proof sprung locking flap protects the connections when not in use and locks in the 7 pin plug when in use. 7 Pin Connections - 12 N Black Cable Function PIN 1 - Yellow Wire (Left/H Direction Indicator) PIN 2 - Blue Wire ( Rear Fog Lamps ) PIN 3 - White Wire ( Earth Return ) PIN 4 - Green Wire (Right/H Direction Indicator) PIN 5 - Brown Wire (Right/H Tail & No. Plate Lamp ) PIN 6 - Red Wire (Brake lights) PIN 7 - Black Wire (Left/H Tail & No. Plate Lamp ) 13 Pin Connections - Cable Function Pin1 - Yellow Wire ( Left Indicator ) Pin2 - Blue Wire ( Fog Light ) Pin3 - White Wire ( Earth Return ) Pin4 - Green Wire ( Right Indicator ) Pin5 - Brown Wire ( Right tail / Side Light ) Pin6 - Red Wire ( Brake / Stop Lights ) Pin7 - Black Wire ( Left tail / Side Light ) Pin8 - Wire ( Reversing Light ) Pin9 - Wire ( 12V Pemanent power from battery ) Pin10 - Grey Wire ( 12V Ignition on ( Battery charging or Fridge ) Pin11 - White / Black Wire ( Earth for Teminal 10 ) Pin 12 - White / Blue Wire ( NOT usually used ) Pin 13 - White / Red Wire ( Earth for Teminal 9 )