82 charging problem

My alternator bench charges fine but in the car it does not charge.
With any accessories on it discharges. Could it be a ground? Any other
ideas? Thanks

When you say it bench tests fine, are you able to simulate the load? It
sounds like you have alternater output, but very low output if you only
notice it discharge with the accessories turned on. It could be that one or
two phases out of the three in the alternater are inoperative (shorted
windings, punctured diode etc). Check out amp output on the bench and
compare that to the spec.
Steve G.
"Kenneth Haines" > wrote in message
...
> My alternator bench charges fine but in the car it does not charge.
> With any accessories on it discharges. Could it be a ground? Any other
> ideas? Thanks
>

My Grand-Am had a similar problem. It turned out to be a phase in the
alternator.

"Kenneth Haines" > wrote in message
...
> My alternator bench charges fine but in the car it does not charge.
> With any accessories on it discharges. Could it be a ground? Any other
> ideas? Thanks
>