Honda Car Forum

I was having a strange intermittent battery light problem (which I
would be happy to explain in more detail later if you want), and
finally decided it must be the alternator, so replaced it today. It
worked great for about 2 miles, and then the light went on again. Now
the voltage across the battery when it is running is too high - I read
as much as 17.5V. If I'm reading my chilton manual right, the voltage
regulator is in the alternator, but I want to verify that.

So did Autozone sell me an alternator with a bad voltage regulator? The
original problem was not charging when the light came on - when the
light was off it was 14.5V, which I understand is normal charging
voltage.

91 Accord LX

Hans Fugal <fugalh@gmail.com> wrote in message
news:1136255928.947881.283820@o13g2000cwo.googlegr oups.com...
> I was having a strange intermittent battery light problem (which I
> would be happy to explain in more detail later if you want), and
> finally decided it must be the alternator, so replaced it today. It
> worked great for about 2 miles, and then the light went on again. Now
> the voltage across the battery when it is running is too high - I read
> as much as 17.5V. If I'm reading my chilton manual right, the voltage
> regulator is in the alternator, but I want to verify that.
>
> So did Autozone sell me an alternator with a bad voltage regulator? The
> original problem was not charging when the light came on - when the
> light was off it was 14.5V, which I understand is normal charging
> voltage.
>
> 91 Accord LX
>
AutoZone or PepBoys et al., should be happy to test that for you.

It turned out it was a bad VR in the alternator they sold me - it was
putting out 25.5V on the test bench. Luckily the second time around was
easier and I got a good one in there, and all is well.

Hans Fugal <fugalh@gmail.com> wrote in message
news:1136577686.983707.23890@g43g2000cwa.googlegro ups.com...
> It turned out it was a bad VR in the alternator they sold me - it was
> putting out 25.5V on the test bench. Luckily the second time around was
> easier and I got a good one in there, and all is well.
>
Thanks for posting back with results.