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Generator On-Vehicle Tests - No-Load Test

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. Switch the tester to the voltmeter function.
  2. Connect the voltmeter positive lead to the generator B+ terminal, circuit 38 (BK/OG) (2.3L), or circuit 36 (YE/WH) (3.0L), and the negative lead to ground.
  3. Turn all electrical accessories off.
  4. With the engine running at approximately 2,000 RPM, check the generator output voltage. The voltage should be between 13.2 and 15.5 volts. If not, refer back to the pinpoint test or Go to Symptom Chart .
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