How to Wire a Chevy Alternator | It Still Runs How to Wire a Chevy Alternator by Kevin Krause . Disconnect the car's battery before beginning any work to avoid the risk of electric shock while wiring your alternator. Step 2. Tighten the mounting bracket onto the alternator using bolts. Mount the bracket to the Chevrolet C10 Alternator - AutoZone In order to keep your battery 100 percent charged, you need a voltage output between 13.5 and 14.8. Our performance alternator for Chevy C10 is designed to optimize induction and keep all of your accessories fully powered. By carrying a smaller current between finer wires, our Chevy C10 alternator gives you lasting performance.