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Generator On-Vehicle Tests - No-Load Test

  1. Switch the Battery Tester to the voltmeter function.
  2. Connect the voltmeter positive lead to the generator B+ terminal, circuit (BK/OG) and the negative lead to ground.
  3. Turn all electrical accessories off.
  4. With the engine running at 2000 RPM, check the generator output voltage. The voltage should be between 13.0 and 15.0 volts. If not, see SYMPTOM TROUBLESHOOTING CHART - CHARGING SYSTEM  .
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