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Test G: Generator Noisy

  1. Check For Accessory Drive Noise

    Turn ignition off. 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

    Disconnect generator 3-pin connector. Start engine. Use a stethoscope or equivalent listening device to probe the generator. Do not exceed 3000 RPM or the generator may become electrically functional. Is the noise still present? If yes, go to next step. If no, install a new generator. See GENERATOR  under REMOVAL & INSTALLATION. Test the system for normal operation.

  4. Check Generator For Mechanical Noise

    Use a stethoscope or equivalent listening device to probe the generator and the accessory drive area for unusual mechanical noise. Is the generator the noise source? If yes, install a new generator. See GENERATOR  under REMOVAL & INSTALLATION. Test the system for normal operation. If no, diagnose the source of the engine noise.
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