How to Wire an Electric Winch | etrailer How to Wire an Electric Winch. Electric winches require power from a battery to be operational. With proper wiring, power can be provided to the winch through a vehicle battery or through a separate, auxiliary battery that powers the winch only. 12 Volt Winch solenoid Wiring Diagram | Free Wiring Diagram Collection of 12 volt winch solenoid wiring diagram. A wiring diagram is a streamlined standard pictorial depiction of an electrical circuit. It shows the parts of the circuit as simplified forms, as well as the power and signal links between the devices. Wiring Diagram | Savwinch Boat Anchor Winch Specialists On this page you will find a basic wiring diagram to help you with installing your Savwinch Boat Anchor Winch and electrical system. This Diagram is not current for all models.