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Have you replaced the battery in the fob?
I have a jeep 1994 Jeep Grand Cherokee and found this answer on this site under programing a 1995 jeep Grand Cherokee. Its a very good description uses the same FOB.
Dealer only on 96+ newer Jeep Grand Cherokee's
Dealer only on 96+ newer Jeep Grand Cherokee's
I just saw a post that said to take out the little key, insert a small flathead screw driver into the fob, and it should pop apart to allow battery replacement.
Open the key fob up and look see what battery it contains. Buy that exact battery.
it has to be done by the dealer. =(
If the security system on a 1991 Jeep Cherokee will not allow the jeep to start and the key will not turn in the lock, disconnect the battery for a few minutes. Try the key in the lock with the battery disconnected. If it works the first time, reconnect the battery and the system should be reset. If the key does not work in the lock, reconnect the battery and reprogram the key fob.
A programmed RKE fob (remote) or a chipped key is required.
If you have the key fob on your person, that is a lock or unlock button.If you have the key fob on your person, that is a lock or unlock button.
the key fob battery is the battey in a key fob torch
Try unlocking either the driver's door or the liftgate with the key.