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Questions and Answers

Jeep Grand Cherokee Alarm System

Q. Hi, I have a 1993 Jeep Grand Cherokee 4WD 4.0 liter with 76,000 miles. My question deals with the factory security system. Only one remote will work at a time, and suppose to be able to program up to four. When I use the remote to unlock the doors and deactivate the alarm, the interior lights are supposed to light up and stay lit for a number of minutes.

Jeep Grand Cherokee Alarm System

Also when you get in and out of the vehicle. Also the alarm light is supposed to light up on the dash when armed. Well, mine only works correctly 1 out of 100 times. I've been all through the Haynes manual, also in the little owners manual, and can't find anything on troubleshooting this problem. I really can't afford to take it to the Jeep dealership, so if you could point me in the right direction I'd really appreciate it.

Thanks a bunch,
Shelly

A. I would try reprogramming the Remote Keyless Entry (RKE) transmitters before looking for anything else. Make sure the batteries in the RKE transmitters are good and replace them if in doubt. Here's the procedure for programming the RKE transmitters.

Up to 4 Transmitter Identification Codes (TIC's) can be programmed into the receiver at any given time.

  1. Open the driver's door of the vehicle. Leave it open through the programming procedure.
  2. Move the mechanical door lock lever to the LOCK position.
  3. Insert the ignition key and turn it to the RUN position.
  4. Turn the ignition to the RUN position. Within 20 seconds, aim a transmitter at the receiver dome and press the lock button, for at least 5 seconds. Once the receiver accepts the programming code the driver's door will unlock.
  5. Once the first transmitter has been programmed, additional transmitters (up to 4) may be programmed into the receiver. Within 20 seconds of the previous transmitter programming, move the mechanical door lock lever to the Lock position. Aim another transmitter at the receiver dome and press the LOCK button for at least 5 seconds. The door lock will cycle again.
  6. To lock the programmed codes into the receiver, the ignition must be turned off and back on within 20 seconds after programming the last transmitter's code. At that time, all previous codes are erased from the module.

If the alarm still doesn't work correctly, you probably have a bad Alarm Module.

Jeep Grand Cherokee Alarm System

Additional Information provided courtesy of ALLDATA

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