1998 Ford Crown Victoria Alternator 98 Cvpi Makes Buzzing Humming Sound Car Off

1998 FORD CROWN VICTORIA
145,623 MILES
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The alternator in my 98 cvpi makes a buzzing or humming sound when the car is off.I know that the noise is a draw on my battery. The alternator is new and so is the battery,however every morning I go to start car and battery is dead what can cause that
Feb 22, 2013 at 5:20 PM
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CARADIODOC
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That's an option not many other people got! Check if the "Battery" light on the dash is turning off. That is is the turn-on circuit for the built-in voltage regulator. If the light is on, you have an ignition switch problem. If it is off, I suspect the voltage regulator is defective. One wire to it, (typically yellow) will have 12 volts all the time so there is a power source there if there's an internal defect.
Feb 22, 2013 at 5:41 PM
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