94 Grand Cherokee alarm disable:
1) Remove the driver door panel 2) Remove the lock 3) Remove the switch from the back of the lock 4) Pull the switch cord assembly to the bottom of the door cavity 5) Unplug and remove the switch assembly from the car 6) Either (a) short the female end of the plug, or (b) ground the striped wire to the car door
This worked fine for me - no more malfunctioning alarm!
additional comment: My 95 GC came to me used without a remote clicker for the keyring and the alarm was malfuntioning. I removed the Security Module, a black box under the dash, and that completely disabled just that system. I live in a small town and typically leave the keys in the car anyway so I don't miss having an alarm system.
Another comment: What I did on my 94 Jeep GC Limited. It came with a remote for the locks and security, but I no longer have it. On the roof of the inside of the car where the front map lights are there is a screw, once you undo that screw you can just pull the whole assembly down and there is a harness with connectors up there. Just disconnect the one near the back and the remote locks and security will no longer work.