(Plate Lamp), PIN 6- Red Wire(Brake lights), PIN 7- Black Wire(Left/H Tail& No. Plate Lamp). This is a 12V trailer connector plug. It supplies power to your caravan, towing and truck. This 12V trailer plug connector with 7 pins is a great option for boats and it's also great to be used on an RV, caravan, etc.
eBay