I have been looking for anyone else this has happened to. Last night my Daughters 97' Cherokee had a dead battery. I hooked up my Roll Around charger to it, on 12V high for 1 hour. Then I set it to 6V/12V low and left it on the rest of the night. This morning I remembered I had not turned the charger off and was worried about leaving it on too long, so I went home to disconnect it.
I pulled into the garage and as I walked out to the driveway to disconnect the charger, I heard the Jeep running. There was no key in the ignition and no one had been home since 6am and it was now 9:30am.
This Jeep has no remote starter installed whatsoever, and it does not have keyless access either.
Could the battery charger somehow shorted/overloaded a relay for the ignition?
Also, the shift lever PARK switch is going bad and you have to push forward on the shifter to get the Jeep to start. ?????
Skip