i have a 98 grand prix with a 3.8 and the starter went out. i replaced the starter and since then the battery wont charge. i have put 2 alternators on it and still no change. the car idles fine with no lights on. while driving the batt light will come on and also the check gauges light will come on. they come on at the same time and are on for about 3-5 seconds and then go off. every couple minutes it does this and eventually it dies. anybody have any ideas? was there a wire i didn't reconnect or may have moved and broken a wire? any help would be greatly appreciated.