1994 Jeep Grand Cherokee alarm system

BFDFF94

MEMBER
1994 JEEP GRAND CHEROKEE
4.0L
6 CYL
4WD
AUTOMATIC
264,000 MILES

I'm not sure what is going on with the alarm system so I really need help. The other day I had the doors locked and I opened the drivers door with the key and no alarm went off then I hit the unlock button to open the other doors no alarm and then I opened the rear drivers side door and the alarm starts going off. I'm clueless about this please help.

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,536 POSTS

Yep, sometime the system can get confused, with the ignition "OFF" disconnect the battery for about a minute, then reconnect, the problem should go away, let me know what happens :-)

Best, Ken

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Friday, August 9th, 2019 AT 5:43 PM

BFDFF94

MEMBER
4 POSTS

I've been researching it and what I've found so far says that there are 1 to 2 sensors in each door for the alarm system and that they sometimes wear out so instead of unlocking the car from the drivers side I unlocked it from the passenger side and the alarm disarmed

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Friday, August 9th, 2019 AT 5:43 PM

KEN L

MASTER CERTIFIED MECHANIC
47,536 POSTS

Yes, that can definitely happen, those switches are located inside the latch, they will need to be tested using a wiring schematic from google images, basic open and closed circuits, the drivers side should be the one with two switches. Have you tried unlocking and locking the rear hatch with the other doors locked? I have seen that reset the system as well.

Best, Ken

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Friday, August 9th, 2019 AT 5:43 PM

BFDFF94