My 93 SC300 was flashing the "battery" when the A/C was on or the power steering kicked in. The battery was still good, but the alternator was not working. I went to a local alternator shop to get it fixed instead of buying a new one. He said that the regulator was out. The fixed alternator was working until the A/C or the power-steering was needed. The alternator shop fixed it again, same problem. Again the regulator was out. He tested the amps on the alternator, and it only put out 75 instead of 100.
Several questions: What does the regulator do within the alternator? Regulate the voltage?
Has the shop fixed the alternator or do I have some electrical problem that is causing the alternator to go bust?
I think that the a/c and power steering is demanding more than the alternator currently is putting out which would mean that the shop didn't fix the alternator correctly. FYI, my car has no additions; stock system..