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No-Load Testing

  1. Attach tachometer to engine. Start engine and operate at 1500 RPM with no electrical load (foot off brake and doors closed).
  2. Take voltmeter reading when needle stops moving. This may require waiting a few minutes. Voltmeter reading should increase, but not more than 3 volts greater than base voltage. See BASE VOLTAGE TEST .
  3. If the voltage increases at least .5 volt over base voltage, proceed to LOAD ON-VEHICLE TESTING. If voltage increase is more than 3 volts, proceed to HIGH VOLTAGE ON-VEHICLE TESTING. If there is no voltage increase, or voltage increase is less than .5 volt, proceed to LOW VOLTAGE ON-VEHICLE TESTING.
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