(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.
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