On Mar 11, 9:19*pm, Fijoy > wrote:
> Hi all,
>
> The battery/alternator light came on when I was driving my 1991 Accord
> today morning. The light goes off when the rpm goes above a certain
> level: it was 2500rpm in the morning, but when I checked in the
> evening, it was 4000rpm. I replaced the battery a few months ago, so
> my first guess was that the alternator is failing, but when I read
> related posts on this group, I saw that it could be a bad voltage
> regulator, loose connections, slipping belt, etc. The belt and
> connections seem fine. How do I determine if it's the alternator or
> the voltage regulator?
>
> Thanks much,
> Fijoy

Thank you all for the responses. My mechanic confirmed that it was the
alternator. He found a used alternator did the replaced the whole
thing, for a total of $265. He said I should be good for ~2yrs with
that used one.