Something is draining the battery. It started about a month ago when I noticed the " Amp" light would come on intermittently. Well one day when I stopped for gas I couldn't get the car started again, the battery was dead. I replaced the battery with a new one and that solved the problem for a short term. After a few weeks the battery was dead again. So I thought the alternator must be bad.
I took the alternator to a parts store and they put it on a machine and tested it and it tested good. Also when I take off the + cable on the battery the car continues to run fine, so I definitely don't think its the alternator.
My question is what else could be causing this drainage of the battery? How would I find out what it is?