Car died on me while driving on the hwy. Thought maybe the alternator had gone out. Removed and got it checked and passed. Battery is at 12V and starter is brand new. What else could cause this? Car has been sitting for a few days and still doesn't start up. It doesn't crank at all. What do you guys think this could be? Its a 2000 2.5RS it has an alarm system and it is a manual.