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Generator No Load Test

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 Mazda B4000, 2003 Mazda B3000, 2003 Mazda B2300, 2002 Mazda B4000, and 2002 Mazda B3000. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition switch to OFF position. Switch DVOM to voltmeter function. Connect positive lead to generator connector A-172 (Black/Orange wire). Connect negative lead to ground.
  2. Start engine, turn all electrical accessories off. With engine running at 2000 RPM, monitor generator voltage output. If voltage output is 13-15 volts, generator is operating normally. If output is not 13-15 volts, investigate concern. See SYMPTOM INDEX  table under SYSTEM TESTS.
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