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Load Test

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1990 Mercury Sable, 1990 Mercury Grand Marquis, 1990 Lincoln Mark VII, 1990 Lincoln Continental, and 1990 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
  1. Attach tachometer to engine. Start engine and turn on A/C-heater blower motor to high position. Turn headlights on high beam. Increase engine speed to 2000 RPM.
  2. If voltmeter indicates a minimum increase of .5 volt over battery voltage, alternator operation is normal. If voltage increase is less than .5 volt, proceed to UNDERVOLTAGE TEST.
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