1997 Ford F150 Regular Cab Logo
Posted on Oct 09, 2009

97 f-150 high pitched wine from radio, buzzing behind instruments

97 f-150 4.6L 4WD high pitched wine from speakers, burning smell. Buzzing behind the instrument panel...no mechanical side affects

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  • Posted on Oct 09, 2009
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If the whine changes pitch with engine RPM it could be a serious problem with the alternator. Possibly the voltage regulator, or a shorted diode in the alternator causing high frequency AC to be fed into the harness.

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