How to Wire a Chevy Alternator | It Still Runs How to Wire a Chevy Alternator by Kevin Krause . The GM alternator used in all Chevrolet models is easy to install, as it is connected using only a few wires. The alternator converts the engine's mechanical rotations into an electrical current using a pulley-and-belt system. This current is fed to the car's battery, charging it for later use.[PDF] 1989 WIRING DIAGRAMS R-V, P TRUCK MODELS 1989 WIRING DIAGRAMS R-V, P TRUCK MODELS When reference is made in this manual to a brand name, number, or specific tool, an equivalent product may ponent (such as an alternator or a starter), or a wire wire broken off in a device, or a wire that burned open from too much current.