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Turn Ignition to on position. In the trunk on the left side under the carpet is an open two pin connector. Jump those two pins with a paperclip or similar. While it's jumped push any button on all of the fobs that you want to program. You'll hear the RKEM click after each fob is programed. When all fobs are done turn the Ignition off and then remove the jumper. The fobs should all work now.
-Chad
I posted a link above that says in the 93, its behind the glove box. Try looking there. Did your son's car have a remote before?
Does his car have a keyless entry module mounted behind the rear seat. From the trunk it will be in the upper left corner mounted to the seat. A little black box with 2 or 3 pigtails coming out of it. If he doesn't have that box then he doesn't have keyless entry.
I don't think it can have keyless entry without the keypad on the door.
-Chad
Does he have a Keyless Entry Module? In the trunk on the upper left side of the rear seat. Black box with 2 or 3 pigtails. Verifying this, yes or no, will determine if it has keyless entry or not. The fact that it came with fobs doesn't mean anything if they didn't work to begin with.When I checked the trunk drivers side he didn't have the gray connector with the open end like my car. His car doesn't have the keypad but did come with key fob.