First time poster on here and this is my first car. I bought my Mustang under the impression that everything ran fine, was not the case. So I have had to put in quite a bit of money on my car. One of the problems I have noticed is that the battery light turns on and off from time to time. The car has never turned off though, it has been doing that for about three weeks now. I took it to Autozone and got the battery and alternator checked, both of them were said to be fine. I checked the fuse (I think that is what it is called) and that is fine. What I am thinking is the alternator passed the test because I had just turned on the car. I read somewhere that happens but when the car "heats up" that is when the battery light turns on. The light only turns on with about 30 minutes of driving in it. What do you guys think?