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Old 06-19-2005, 10:04 PM   #1
Scooby Guru
Member#: 48528
Join Date: Nov 2003
Chapter/Region: MAIC
Location: That guy w/the hot LARP costum
Default does an alternator make a very high pitched 'scream' when its dying/dead??

Just curious, as I am having electrical issues that I am almost certain is alternator related.

But I replaced it with a used unit and my car today would randomly just lose all electrical power, and actually shut off once completely. This sounds like a short to me, can an bad alternator do this? This never happened with the other alternator though.

also I get a very high pitched whistle/scream from what seems to be the area of the alternator...is this normal?

and I don't seem to get over 13.9 on one alternator, and the other seems to start at 14.3-14.4 and as it gets hot die down?
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Old 06-19-2005, 10:27 PM   #2
Scooby Guru
Member#: 4597
Join Date: Mar 2001
Chapter/Region: TXIC
Location: Laredo, Texas
2011 Mitsu Outlander
Sport (Ex-Suby owner X3)


loose belts maybe?
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Old 06-20-2005, 09:52 PM   #3
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Member#: 27136
Join Date: Oct 2002

My alternator regularly "squeeks" for long durations when its usually hot. Its like a long squeel, except at a really high pitch. My belts are not loose, and I have no idea why it does that. But can only assume its still working, since I don't seem to have any electrical problems. My idle voltage is usually 14.4 when started up in the morning, and goes down to 13.8 or so when everything it hot and at running temperature. Not too sure why it does it, but seems to do the same thing as you.

I guess it should be fine. ?
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