Hey guys. This isn't really a mustang issue but more of a general car issue. My dad has a 2000 chevy malibu. The battery light on the dash sometimes goes on while driving. When he turns the car on, the battery light is always off but then eventually goes on at some point and doesn't turn off. He has to pull over, turn the car off, wait a few seconds, turn the car back on, then the light stays off. Both the alternator and battery are in good condition. At first he thought it was the alternator. But after buying a new alternator, he still has the same problem. Any ideas on what might be happening here?? 
Thx
Thx