02 tracker problems

My dads tracker just died on him the other day and we cant figure out why. We checked all the fuses and the oil and everything like that but nothing seems to be a problem. It has the 4 cyl engine in it. He was just driving it and said that it was acting a little rough, then at a stop sign the thing just died. So if anyone would know what it might be i would greatly appreciate the info.Thanks

Verify that the battery is good, alternator is good and that the accessory belt is intact. These are the most likely culprits given the information provided.
Regards, gb

yes the battery and alternator are both good, and all of the belts are intact.