Operation CHARM: Car repair manuals for everyone.

Output Test

1. Connect tachometer to engine.
2. With engine running, turn A/C blower motor to the maximum position and headlamps to the high beam position.
3. Increase engine speed to approximately 2000 RPM.
4. Voltmeter should indicate a minimum of 1/2 volt above normal.
5. If voltage is within specifications, the charging system is operating correctly.
6. If voltage is not within specifications, refer to "Over Voltage" or "Under Voltage Test."
Over Voltage Test
Under Voltage Test