Specification:Connect the major vehicle and the additional trailer.Transfer the electronic signature from the vehicle to trailer.This is a 13 pin towbar electrics socket. Black plastic, 13-Pole, trailer socket europe style - vehicle end.Establish a secure connection between your towing vehicle and trailer with this 13-pole.Black plastic socket has non-corroding, shock-resistant interior design that eliminates shorting out.Ideal for use with detachable towbars as your can hide the sockets away with this product and not have the electrics on show when you are not using the towbar.This supplies power to run the caravan fridge and charge the caravan battery while you drive - ensuring you reach your destination with everything ready for use.A feed for the caravan interior lighting is also available in socket so you can use your car battery to operate your caravan lights while you are hitched-up.This will also run your road running lights on the back of your trailer / caravan.If you have a European caravan or cycle carrier then the 13 pin plug will just fit into this socket.13 Pin Lighting Connections - Cable FunctionPIN 1 - Yellow Wire (Left/Hand 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 (Stop Lamp)PIN 7 - Black Wire (Left/H Tail & No. Plate Lamp)PIN8 - Pink Wire ( Reversing Light)PIN9- Orange Wire ( 12V Permanent Power From Battery 12V)PIN10- Grey Wire12V Ignition on (Battery Charging or Fridge)PIN11- White/ Black Wire (Earth for Terminal 10)PIN12- White /Blue Wire (Not Usually Used)PIN13- White/Red Wire ( Earth for Terminal 9) Type: 13-Pin Trailer PlugMaterial: Plastic + CopperWaterproof: YesPin Quantity: 13PcsSize: 9cm x 6cm x 6cm/3.54" x 2.36" x 2.36" (Approx.) Note:Due to the light and screen setting difference, the items color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement. Package Includes:1 x 13-Pin Trailer Plug