In vehicles originally equipped with a breaker point ignition, the wiring harnesses "R"circuit was a ballast resistor bypass.This terminal is "no connection" when the starter is at rest and is +12VDC while cranking.This circuit provided +12VDC to the ignition coil during cranking for easier engine starting.. Learn how to correctly wire a starter solenoid in a GM vehicle for optimal performance and reliability. Find step-by-step instructions and diagrams here.
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 ord. Access free wiring diagram repair guides through AutoZone. Get the electrical schematics you need for your car, truck, or SUV.