Join Date: Jan 2007
Location: Mission Viejo CA
98 Grand Cherokee Laredo Alarm problems-Factory or Aftermarket?
Just got my nephew his first car, a 98 GC Laredo 4.0 2WD. My question is how can I tell if this thing has a factory alarm or aftermarket one? Its very different from my factory alarm on my 95 GC Limited.
Ok on my 95, I dont have the key fob anymore but my alarm will arm when I hit the auto door lock button on the drivers door and will disarm when I unlock the drivers door or the tailgate using thd key.
On the 98 GC which does have a key fob, the alarm will will arm by auto door lock on drivers door or by pushing lock button in the fob. It will not disarm with the key turn in any door, at all. It will only disarm using the unlock button on the fob.
Heres the issue im having. After unlocking with fob all is ok for about 30 seconds then for some reason the alarm will re-arm itself. I was replacing the cargo area carpet yesterday. I unlocked doors with fob, opened the 2 back dooes and the lift gate, then after 30 seconds itvre-armed and I would have to hit the unlock button again or risk the alarm going off if I made the car wiggle too much. I ended up clipping the fob onto my belt loop because I needed to hit unlock ever 30 -60 seconds.
It was a huge pita. What could cause this?
Im not sure its a factory alarm as it also differs from mine in that prior to me putting new batteries in the fob, the alarm would go off every time you used the key to unlock the door. The only way to disarm it was by putting the key inbthe ignition, turning to the on position and pressing a button thats under the dash on the drivers side near the obdii connector. My 95 ltd doesnt have any button under the dash for disarming the alarm. That is why I think the 98 might have an aftermarket alarm. But either way, what would cause the issues im having with it and or how can I dusable it all together. I've read that if I cut the violet/yellow wire and ground it that my dome lights will never shut off causing a dead battery. Thats what happens if you use that method on the 98 models only.
Any help identifying factory vs. aftermarket and fixing or properly disconnecting altogether would be great.
wifes 95zj 4.0 42re np249 201,000mi
mine 89 xj 4.0 aw4 np242 445,000mi
nephews 98 zj laredo 4.0 2WD 213690mi