here's the deal. my daughter has this car up at college and I'm trying to help here over the phone. about 1 month ago car wouldn't start (-10 degrees) so she jumped it and blew the 100 amp fuse. (maybe crossed polarities) So I figured that out and she replaced the fuse and battery and it worked fine. Now the car will only start with a jump and run for about 5 miles then the lights go dim and it dies. I know it's probably the alternator but was hoping it could be something easier?