| | List |
| Subject: | Re: 16 volts instead of 12 a problem? |
| Poster: | HLS@nospam.nix |
| Date: | Wed, 21 Mar 2007 15:33:25 EST |
| Related Postings: | 1 2 3 4 5 6 7 |
"Steve" wrote in message
news:4-Gdnf4AxbaUE5zbnZ2dnUVZ_hSdnZ2d@texas.net...
> AZ Nomad wrote:
>
> > On Wed, 21 Mar 2007 13:58:21 -0600,
wrote:
> >
> >
> >
> >>Something is definitely wrong. It could be the voltage regulator, which
is
> >>internal to GM alternators I am familiar with. I would check visually
for
> >>any
> >>obvious wiring problems, then take the alternator in for testing...or,
just
> >>take the car to a competent mechanic and let him fix it for you.
> >
> >
> > It *is* the voltage regulator. No other component is responsible for
voltage
> > regulation.
> >
> >
>
> Well....... Not entirely true. It can also be something like an
> alternator rotor with an internal short to ground. On many alternators,
> the regulator works by varying the effective resistance that is in
> series with the ground return from the rotor, with battery voltage
> always being available to the other terminal of the rotor. If a short to
> ground develops in the rotor, the alternator will charge without
regulation.
I know that on many alternators you can intentionally bypass the voltage
regulator in order to get DC voltages and currents high enough to power
AC/DC tools. In case such an connection were made accidentally, then
the result would be higher voltage, regardless of the regulator. If it can
be done intentionally, then it can happen incidentally.
But I agree with AZ, it is most likely the regulator.
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