When I got out of my cherokee the doors locked and the keys were in the ignition and the car was running. This was ok because I was home and I had an extra key fob in the house. But the reomote would not unlock the doors or the rear window. I didn't have a spare key to manual unlock the doors. This has never happen before. I had to pay someone to get the doors unlock. After that I shut the doors with the key in the ignition and this time the key fob worked. Opened and unlocked doors while the truck was running.

Unlock all of the Jeep Grand Cherokee's doors and open the driver's side door. Keeping the door open, lock it using the manual lock on the door itself.

Put the manual key into the ignition and switch it to the "On" or "Run" position, whichever applicable, without starting the engine.

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Point the remote at the receiver (located by the little bulb on the car ceiling) and hold down the "Lock" button for up to 5 seconds.

When the driver's side door unlocks, you know the remote has been programmed correctly. If you are only programming one remote, jump to the next step. If not, manually re-lock the driver's side door and repeat steps 5 and 6 using each remote you would like to program and then continue.

Turn the key to the "Off" position and turn the ignition on immediately. This must be done within 20 seconds of programming the last remote. You're finished!