TROJAN HD Protector Coupling Lock Christmas20 The black wire is for

The black wire is for the negative connection

Upgrade your trailer's electrical system with the Narva Trailer Connector 12 Pin Flat Plastic Socket (82072BL)

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TROJAN HD Protector Coupling Lock Christmas20 The black wire is forTROJAN HD Protector Coupling Lock Protect your caravan, boat, or trailer from theft with the TROJAN HD Protector Coupling Lock, a heavy duty solution designed to provide maximum security and peace of mind. Crafted with a heavy duty multi fit, anti theft locking mechanism, this coupling lock is compatible with both 50mm and 1&7 8 inch couplings, offering versatile protection for a wide range of vehicles. Its 15mm solid hexagonal steel adjustable