AW: [DML] Re: Alternator Sound
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AW: [DML] Re: Alternator Sound



A failed sensor lead - normally the one that feeds the bulb in
the dash can cause the symptoms you describe.

Or when the bulb is dead - same situation.

The regulator doesn't get enough power to work at lower speeds.
when you rev it higher, the remaining magnetism produces
enough voltage to make the regulator work and then keeps it running.

I have seen this on my buddys car and also read it in an automotive
book.

So - start by looking if the battery-bulb in the dash
works how ist should be.

Elvis

What kind of alternator do you have? I've heard of this issue on some
aftermarket units, just wondering.

Dave Swingle

--- In dmcnews@xxxxxxxxxxxxxxx, "valleyrat12" <valleyrat12@xxxx>
wrote:
>
> Gee I'm posting here a lot...
>
> OK, I noticed while my car is idling right after it is started that
> my battery voltage is low, below the 14 or so volts it should read
> when running. If I rev the engine the meter will suddenly bounce up
> to where it should be and continue even when the engine runs back
> down to idle, indicating that the alternator is working. Also, a
> whirring sound can be heard from the alternator AFTER the gauge
> indicates that it is working. I have cleaned all of the contacts
and
> the condition persists.
>
> I have noticed this on other cars and assume that the sound is
> normal, but I assume that my alternator is dieing. What would cause
> the alternator to work only after the engine is revved up to 3000
> rpm? Also, there are some wires (2) that are hanging down by the
> alternator that are not hooked up, Black/Green I think.
>









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