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No Load Test

  1. Attach suitable tachometer and start engine. Operate at 1500 RPM with no electrical load (foot off brake and doors closed).
  2. Voltmeter reading should be taken when needle stops moving. This may require a few minutes. Voltmeter reading should increase 1-2 volts above battery voltage. If OK, proceed to Load Test. If more than 2.0 volts increase, proceed to Over-voltage Test. If no increase results, proceed to Undervoltage Test.
    Fig 1: Terminal Locations For Rear And Side Terminal Alternator
    G09358630Courtesy of FORD MOTOR CO.
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