Voltmeter Test Procedures
NOTE:
When performing charging system test with a voltmeter, turn off all lights and electrical components. Be sure battery specific gravity is at least 1.230.
- Connect negative lead of voltmeter to negative battery post and positive lead to positive battery post. Record voltage.
- Attach tachometer and start engine. Operate at 1500 RPM with no electrical load. Voltmeter reading should increase 1-2 volts above battery voltage. Reading should be taken when voltmeter needle stops moving.
- With engine operating, turn on heater or A/C blower motor to "HIGH" position. Turn on headlights to high beam. Increase engine speed to 2000 RPM. Voltmeter should indicate a minimum of .5 volt increase over battery voltage. If system conforms to these readings, operation is normal.