- Tighten all alternator and bracket bolts. - If installing an alternator with OEM wiring connections, reconnect alternator wires and battery ground cable. If installing a 1-wire alternator, see wiring instructions at upper right. - Make sure battery is fully charged before starting engine.. This article will show you how to wire the exciter wire on an alternator. The exciter wire, which turns the voltage regulator on and is essential for starting your car, is required to generate the required voltage for the alternator to function. It connects the voltage regulator's field terminal (usually blue) to the alternator's L terminal.
JEGS factory-color GM wiring diagrams will equip you to re-wire or trace down an electrical issue, taking the guesswork out of your restoration project. Each application-specific laminated schematic includes interior and exterior lights, engine bay, starter, ignition and charging systems, firing order, gauges, under dash harness, and more.. GM alternator wiring diagram Find a GM alternator wiring diagram GM has many different alternators, and each has its own alternator wiring diagram and alternator symptoms. One of the key differences is how the internal voltage regulator determines the charge rate. Does it check the vehicle's voltage internally or from an outside source?