Mike,
    The 02 light acts as sort of a backup light for
the alternator light.   It does little for the 02
sensor but act like a counter, turning on after a
certain number of miles and staying on.   If both the
alternator light and o2 light come on or flicker on
and off together this indicates a charging problem or
something wrong with that circuit.   If only your o2
light comes on and stays on you need to reset the
light with the counter box near the spare tire.   This
is a bit understated as to actual function.   David
the east coast electrical wizard has a more refined
explanation.   I am just the west coast electrical
lizard, davids long lost cousin, gary
--- Mike Miller <mwmiller@cwnet.com> wrote:
> I thought the O2 and charge lights were different?
> I have an '85 if that
> makes a difference.
>
> Mike
>
> On 1/21/03 10:36 AM, "gary hradek"
> <hradek@YAHOO.COM> wrote:
>
> > Joe,
> >   I think this is all about money and time and
> which
> > you have more of.   In my case I too was puzzled
> by an
> > alternator that was still working with a bad
> whine.
> > Trust me when I say that it is whining to be
> replaced.
> > If you choose to replace the bearing this could
> work.
> > By the time you get to the 02 light coming on and
> off
> > you are living on borrowed time.   You are
> basically
>

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