I am trying to diagnose a problem that a friend is having with their '92 Prizm (which is really a rebadged Corolla). It started when they went out to drive it one day and the battery was dead. So I checked it out, and it seemed like it had a dead cell. Bought a new battery and put it in, and everything seemed fine for a few weeks.
Then, the same thing happens. I take another look and notice that the positive battery terminal is very badly corroded. I replaced it with a new one and cleaned the negative terminal as well for good measure. I jump start the car, everything seems fine again for a few weeks.
This time, the car stalls out as they are leaving a parking lot. As in, they had driven somewhere with no problems, and then they started the engine again, and it died as they were moving at parking lot speed. So now I start thinking maybe it is the alternator or voltage regulator (I believe the regulator is inside the alternator on these, right?). I took the alternator to Autozone, and they tested it and said it was fine.
After that, I checked all the fusible links and fuses, all were fine. I checked the ground strap from the battery to chassis and engine to chassis, and they look fine as well. I have run out of obvious things to check. Has anyone else run into a problem like this?