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Home >> Isuzu >> 1987 >> Impulse Base, Automatic, AW03-72L >> Repair and Diagnosis >> Electrical >> Charging Systems >> Alternator - NIPPONDENSO >> Testing >> On-Vehicle >> Alternator Output Test
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Alternator Output Test

  1. Set Alternator Tester (J-35311) switch to 12-volt position. Connect alternator harness to tester. See Fig 1. Connect White/Red wire to alternator harness.
    Fig 1: Alternator Tester Diagnostic Charts
    G29524
  2. Connect harness to alternator "L" wire (White/Red). Connect Black alligator clip to negative battery terminal. Connect Red alligator clip to positive battery terminal.
  3. Turn ignition switch to "ON" position. Check instrument panel charge indicator light. Start and run engine at 1500 RPM. Turn on low beam headlights. After 10 seconds, check lights on alternator tester. Tester will indicate alternator condition. See Figure.
NOTE: After starting or stopping engine, Yellow light on tester may come on for about 5 seconds. This is normal.