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Test F: Generator Is Noisy

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.

  1. Check For Accessory Drive Noise & Mounting Brackets

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

  2. Check Generator For Excessive Electrical Noise

    Disconnect generator 3-pin harness connector. Start engine and let idle. Is the noise still present? If yes, go to next step. If no, replace generator. See GENERATOR  under REMOVAL & INSTALLATION.

  3. Check Generator For Mechanical Noise

    Turn ignition off. Connect generator harness connector. Start engine and let idle. Turn all accessories off. Using a stethoscope, check generator for unusual mechanical noise. Is the generator the noise source? If yes, replace generator. See GENERATOR  under REMOVAL & INSTALLATION. If no, diagnose source of engine noise.
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