Re: Locks seized. Battery dead. Need to open hood...
Welcome to the garage.
I don't know the ZJ, but I was thinking at an other creative way to get power to open the doors , without having to break anything. If you have a battery charger, you could connect the positive lead to the starter motor solenoid positive wire and the negative lead to any ground wire bolt you will find under there. After charging the battery a bit, the locks should be able to open.
Also, a battery will loose its charge over time and after several months there will be no charge left, even without an alarm going of or the normal battery drain due to the several modules memory functions. If you don't drive your jeep, you better charge it once a month or so. A battery looses 30% of its charge in a month, without any use.