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. Related searches for badland 3500 winch wiring diagram badlands 3500 winch owners manualbadlands 12000 winch wiring diagrambadland winch solenoid wiringbadland 2500 winch wiringwarn winch wiring diagram solenoidbadland winch parts diagrambadland winch 3500 installation instructionsbadland winches 12000 wiring