Charging System: Testing and Inspection

1. Connect suitable alternator test equipment as per manufacturer's instructions.
2. Turn off all electrical accessories, then start engine and run at 3000 RPM.
3. Adjust load to maximum ammeter reading while maintaining voltage of at least 12 volts.
4. If ammeter reading is more than 16 amps below alternator rating, replace regulator and retest.
5. If ammeter reading is still too low, replace alternator.