Check instructions in the users manual.
YOU CAN FINE ALMOST ANY KEYLESS ENTRY ON EBAY AND FOR A GOOD PRICE.. GOOD LUCK.........
The keyless entry receiver is under the console - behind the screens it's the temp and compass
it has to be done by the dealer. =(
It was part of an option package
I had the same problem. Google "keyless entry remote 2003 Jeep Grand Cherokee".
It requires the dealer's scan tool.
The keyless entry system must be programmed with an OBD II tool which the dealer or locksmith has. Sorry that this is not the answer your looking for, I didn't want to hear it either.
You have to program it with a DRB (Scan tool).
Not very easily, since Wranglers do not have power locks.
dealer has to do it with factory scan tool
The only way to program keyless entry is with a very expensive diagnostic tool called "Launch" or go to nearest dealer for programming.
Above your rearview mirror there should be a small black 'ball' (extending from the roof of the car). That is your module. If it's not there, I'm not sure if your Jeep has it. You can always refer to the owner's manual (you can snag one from eBay cheap if you don't already have it) or drop by your Jeep dealership to have them find out for you. Hope this helps!