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Test K: Generator Is Noisy

  1. Check accessory drive belt for damage and correct installation. Check accessory mounting brackets and generator pulley for looseness or misalignment. Repair as necessary, then retest system for normal operation. If accessory drive belts are okay, and noise persists, go to next step.
  2. Check generator mounting for loose bolts or misalignment. Repair or adjust as necessary, then retest system for normal operation. If generator mounting is okay, go to next step.
  3. Disconnect generator connector X-102a. See Figure. Start engine. Turn headlights and rear defroster on, and turn blower motor switch to HI speed position. If noise is still present, go to next step. If noise is not present, replace generator. See GENERATOR  under REMOVAL & INSTALLATION. Retest system for normal operation.
  4. Turn ignition switch to OFF position. Reconnect generator connector X-102a. Start engine, then turn all accessories off. Using stethoscope, check generator for unusual mechanical noise. If generator is noise source, replace. See GENERATOR  under REMOVAL & INSTALLATION. If generator is not noise source, investigate source and repair as necessary.
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