I have a 99 TJ that is just my little summer fun ride. I believe the alternator may be bad. It's had a hard time starting since I bout it and now the dash panel keeps saying check gauges. All the gauges work except the battery. I'm thinking the alternator may be shot and was wondering if an alternator on a 99 Jeep Cherokee sport would be interchangeable. My stepdad has one and it's just sitting rusting away.