Winch wiring diagrams are available online at websites such as NC4x4.com, Winch Service Parts and eTrailer. The diagrams include schematics of the electric circuitry for various winches and diagrams for wiring a winch to an automobile or trailer battery.
The diagrams that NC4x4.com provides include five-wire inline, remote three-wire, remote five-wire and remote six-wire winches. The site also has diagrams for winches such as large-frame three-wire, large-frame five-wire, mid-frame three-wire and mid-frame five-wire.
Winch Service Parts has a three-wire remote wiring diagram for a winch. The site includes contact information for inquiring about parts and other diagrams.
The diagrams at eTrailer are for wiring an electric winch to an outside power source. The options diagrammed include those for a single battery vehicle mount, a dual or auxiliary battery mount, and a trailer-mounted winch.