I was driving home from work on yesterday and my ABS light came on then my auto trac light...no more than 2 minutes later..my radio goes out and just before arriving home the car was kinda sputtering like it wanted to shut off then i turn the headlights off and it was ok. I got home and turned the car off and tried to turn it back on and it wouldn't crank...my interior lights come and and the radio works.....could this be my battery or alternator? any feedback would be greatly appreciated....thanks