Datsun Models

Ensure that battery has a full charge, then connect 30-volt voltmeter as illustrated. Test as follows:

1. Detach connectors at alternator. Connect a test probe from voltmeter positive terminal to "N" or "BAT" terminal. Connect other test probe to ground. Check that voltmeter registers battery voltage.
   Fig 1: Alternator Testing Connections for Datsun

   Courtesy of NOT AVAILABLE
2. Turn on headlights to high beam. Start engine and increase speed to approximately 1000 RPM and observe voltmeter. If voltmeter registers below 12.5 volts, alternator is defective. If above 12.5 volts, alternator is good.