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Theft alarm

Tiny
GEARJAMMER5
  • MEMBER
  • 1998 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 167,895 MILES
I have had this jeep for 3 years and recently I had to replace a dead battery. The problem is that a factory theft alarm now thinks I am stealing my car and will not let me start it.I am using 2 regular (non electronic) keys that I got when I bought it. How do I disable or bypass this damn thing?I had to cut the wires to the alarm horn to shut it up but twisted them back together.
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Tuesday, April 14th, 2009 AT 4:27 PM

16 Replies

Tiny
ZACKMAN
  • MECHANIC
  • 4,202 POSTS
You can't disable or bypass the alarm. It is a part of Chrysler Collision Detection and controlled by the Body Control Module. If you have black key, you don't have chip-coded key, gray key is coded, however.


https://www.2carpros.com/forum/automotive_pictures/55316_98cherokeealarm_1.jpg



Remove these fuses (16 and 26 on the PDC, and 21 on the junction block). Wait a minimum of 2 minutes, and then put them back. Open all doors, including hood and trunk. Close hood, trunk and all doors. Make sure that the driver door is the last one to close. From the outside and using the key, lock the driver door. Wait a minimum of 1 minute. From the outside and using the key, open the driver door.

That should reset the system.

If it doesnt work the first time, try again as it can be finicky if not done exactly right
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Tuesday, April 14th, 2009 AT 8:08 PM
Tiny
RHODAEVERHART
  • MEMBER
  • 1 POST
  • 1997 JEEP CHEROKEE
  • 6 CYL
  • AUTOMATIC
  • 193,000 MILES
Need to dis arm alarm that. Has no button
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,727 POSTS
That is done with the remote key fob or by unlocking a front door with the key. If the key in the door doesn't work, check for broken wires between the door hinges.
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
MEMBER2006
  • MEMBER
  • 3 POSTS
  • 1991 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 170,000 MILES
My teacher has a 91 jeep Che. Limited and it wont start at all, its got spark fuel so on everything it needs it wants to start but ir just keeps turning over, we believe its the security but we cant fix it, we unplugged the wire to the security box under the dash but when we plug it back in the alarm goes off, we are thinking that the security is stopping the car from starting. Does anyone know if it is the security or what it could be, it would REALLY help.
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
If it has spark and gas, it's not the securty system. Check compression and timing. If it's distributorless, unplig the cam sensor, if it starts, it's a timing problem, check the chain.
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
MEMBER2006
  • MEMBER
  • 3 POSTS
He did check the timing chain it wasnt that, but ill check the compression on monday
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
If it has a distributor, remove the cap, crank engine, watch for the rotor, does it rotate?
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
MEMBER2006
  • MEMBER
  • 3 POSTS
I checked the distributor and half the cylinders compression, and so far its not looking like the problem, any other ideas
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
EFLOATFLYER
  • MEMBER
  • 3 POSTS
  • 1996 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 220,000 MILES
I am having problems with the alarm system going
off when I do not want it to. I would like to just
disable it entirely. Is there some wires that can be cut to disable the system so I do not have to deal with it anymore? Thanks in advance.
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
Pull fuse #7 should dis arm but may also take out door locks.
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
CHRISTI992
  • MEMBER
  • 11 POSTS
  • JEEP CHEROKEE
I have a 94 Jeep Grand Cherokee and the alarm system wont disable. We had a mechanic tell us to use the key on the passenger side door and it would work. And it did. For a while. Now the passenger side lock has frozen up and the alarm wont turn off. Is there any way to disable the alarm permanently? Or SOMETHING! We cant drive the car because of the stupid thing! PLEAE HELP ME!
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
For now try different lock
Driver side
Rear hatch

Good luck
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
CHRISTI992
  • MEMBER
  • 11 POSTS
I have tried all locks (they are frozen up) except driver's door and it wont disable the alarm. Is there any way to disable the alarm from the hood or bypass the theft prevention? I am getting desperate
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Remove the door panel
Remove lock cylinder and disarm switch
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
STEPHEN GAJDOSIK
  • MEMBER
  • 1 POST
  • 1993 JEEP CHEROKEE
Electrical problem
1993 Jeep Cherokee V8 Four Wheel Drive Automatic

can this anti theft/security system be disabled this vehicle is getting ready for the bone yard, has 267k and is my wifes primary vehicle. Please help if possible, i'm getting tired of the phone calls about my car wont start and the horn and headlights are blowing and flashing. I'm a certfied heavy duty truck mechanic and reprogramming and ecm reflashing also multiplexing and smartswitches (n-i need to get this off my back Help!
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Friday, December 7th, 2018 AT 6:51 AM (Merged)
Tiny
JNOVACK
  • MECHANIC
  • 723 POSTS
You will have to take to dealer to have it disabled they have to reprogram pcm to allow jeep to start and run but you may also have an after mearket alarm installed also if you do you can access the alarm under dash and remove the alarm module
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Friday, December 7th, 2018 AT 6:51 AM (Merged)

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