Re: 2000 WJ Alarm/Anti theft will not shut off!
When you have a non factory alarm installed, it will become difficult to give any good help. The factory alarm will not prevent the engine from starting, that is the SKIS.
First to shut off the alarm, did you try to unlock the door with the key instead of with the remote?
When you try to start the engine, the engine will crank normally but not start? It will not even run for a few seconds and then shut down again? Does your jeep have the transponder keys for the SKIS system and is a key symbol lit on the instrument panel?