No Load Test

1. Connect a voltmeter, ammeter and battery leads to alternator as shown in Fig 1 and Fig 2. Open switch "SW1" and close switch "SW2". Gradually raise alternator speed, and read speed when voltage is 13.5 volts.
   Fig 1: Subaru Alternator Test Connections

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   Datsun/Nissan meter hookup is similar  .

2. Alternator is working properly if it turns at less than 900 RPM on Subaru and Datsun 310 and Sentra models; less than 1000 RPM on Isuzu, LUV and all other Datsun models.
   Fig 2: Datsun/Nissan Alternator Terminal Identification

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Terminals "S", "L", "BAT" and "E" are marked on rear cover  .