Re: 99 Jeep Grand Cherokee Issues
Check if the red light on top of the dash, close to the windshield, continues to flash slowly when you unlock the door. If yes, its a signal that the alarm didn´t disarm. That could probably be a problem with the driver door lock switch. This is the one which arms/disarms the alarm.
That the engine doesn´t want to start is in fact an other system, the SKIS. It uses a transponder key and a receiver. Do you still have a second key available to test it with that one? Also its important to know if it just won´t start, or if it doesn´t even turn over. If the problem lies with the SKIS, the engine should at least turn over normally and should even start and die after 2 seconds or so. If it doesn´t turn over, its a whole other problem.
The remotes on the jeep are not very sensitive and the receiver is in the passenger side door module. It could help to point the remote in the direction of the passenger door.