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Test F: 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 Excessive Electrical Noise

    Disconnect generator single pin connector (Black/Orange wire). Start engine. With the engine running, determine if the generator is still noisy. 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

    Turn all accessories off. With the engine running, use a stethoscope or equivalent listening device to probe the generator 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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