Operation CHARM: Car repair manuals for everyone.

Alternator

Generator Specifications
Normal Charging System Voltages
Ignition Switch Position A Circuit 36 (YE/WH) S Circuit 904 (LG/RD) Generator B+ Circuit 38 (BK/OG) Battery Engine to Battery Ground Charging System Warning Indicator Operation
Key OFF 12V 0V 0V 12V 12V OFF
Key ON-Engine OFF 12V 0V 1-3V 12V 12V Illuminated
Key ON-Engine ON 12V 6-7V 12V 12V 12V OFF
Generator Output Voltage Between 13.0-15.0 Volts