everyone is wrong. your jeep is indeed haunted. cheek the car fax for any records of previous owners perishing inside the vehicle.
No but in all seriousness It might be your battery or alternator slowly dieing. I know the ZJ's are different from the YJ's (obviously) but My headlights and interior dash lights dimmed and at one point completely turned off while I was driving. Those are easy to cheek for problems also!
-White Jeep Club Member 231-
Replacing random parts on hunches spurred from other vehicles and peoples experiences with them is the safest bet.