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Test G: The Generator Is Noisy

  1. Check For Accessory Drive Noise

    Check the accessory drive belt for damage and correct installation. Check the accessory mounting brackets and generator pulley for looseness or misalignment. Is the accessory drive okay? If yes, go to next step. If no, repair as necessary. Test the system for normal operation.

  2. Check Generator Mounting

    Check the generator mounting for loose bolts or misalignment. Is the generator mounted correctly? If yes, go to next step. If no, repair as necessary. Test the system for normal operation.

  3. Check Generator For Electrical Noise

    Turn ignition off. Disconnect generator connector. With the engine running, using a stethoscope or equivalent listening device, probe the generator. Is the noise still present? If yes, go to next step. If no, install a new generator. Test the system for normal operation.

  4. Check Generator For Mechanical Noise

    With the engine running, use a stethoscope or equivalent listening device to probe the generator area for unusual mechanical noise. Is the generator the noise source? If yes, install a new generator. Test the system for normal operation. If no, diagnose the source of engine noise.
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