Sounds like a typical dead battery but he said he heard it come on when he got in the car and it stopped when he turned the key. Those symptoms sound like a bad ground like mentioned before. Check ur grounds. They do funky stuff like that. I also had an ignition module do funky things like that in my 96 grand am and then the key got stuck. Couldn't get it out. Had to push a button under the steering column to free it but all that was caused from a low battery. Weird stuff happens like that. Same thing with a dying alternator
