Well my car didnt start last night....not cool at all Car started up normal when left for night and then when i came back to it, wouldn't start This same situation happened recently (a month and a half ago) and ended up being fixed by cleaning the terminals connections of the battery However, what has me thinking it may be the alternator is the fact that while I was driving, when I started the heater, the car turned itself off for a microsecond (enough to yurn off my stereo) and turned back on. The car died when I was at a stop light, the rolled down the window and accidently held the switch down like a second after the window was down. I then got jumpstarted and noticed that applying the brakes dimmed my headlights. This makes me think it is an alternator isssue right? As the car shouldnt be drawing any current from the batt while running With that said, I replaced both my alternator and batt in June 2005 so over three years ago. I have put 25k miles on in that time What are your thoughts? Anyone have a lot of experience with this? I should mention that my car exhibited the same behavior last year and it turned out to be low water in batt and corroded connectors. You think it is corroded connectors (doesnt look too bad but neither did last time) or do you think it is an alternator with how it died while running when i applied a load on it (aka power windows and heater)?