Operation CHARM: Car repair manuals for everyone.

Alternator

Generator Specifications
Normal Charging System Voltages
Terminal A S I ALT B+ Battery Engine to Battery Ground
Key OFF 12 V 0 V 0 V 12 V 12 V 0 V
Key ON, Engine OFF 12 V 0 V 1-3 V 12 V 12 V 0 V
Engine Running 12 V 6-7 V 12 V 12 V 12 V 0 V
No Load Test
Engine Speed Output Voltage
2,000 RPM 13.0-15.0 V