The alarm on my 94 Jeep Grand Cherokee keeps going off in the night. Furthermore, as I drive the interior lights flicker on and off occationally. I have read all the posts that apply to me, but still have some questions:
1. how do I completely disengage my alarm without affecting the rest of the vehicle? will pulling the relay solve all my problems?
2. I disconnected the button under the hood, but the lights still flicker as I drive. Could there be a problem with the triggers in the door?

Thanks for all your help - this is a great forum!!!
PrestonP

asked the same at a dealer on my 94 gc, they said it would cause a lot of probs , i disconected the hood alarm as well, it fixed my alarm going off at all times , but sounds like you have other sensors causing the prob, some here say you can disarm the alarm by grounding the purple wire in the driver side door , havnt gone that far yet , tried all the fuses , didnt work , it s a headache i know , but that s so called modern cars

Thanks. When you say hood alarm, do you mean the trigger just behind the passenger headlight that depresses when the hood goes down, or something else? I tried to pull fuses and tinker with the alarm relay, but it didn't help me at all. I was wondering how one might go about fixing sensors on the vehicle? I notice that each door has 2 triggers, one black with red, and one black - any idea what each one is connected to? The dealers have not been too helpful on this one, seems the alarm is a tricky business to fiddle with. Again, thanks for the help. - - Preston

yes that s the alarm button i was talking about , i just disconected the wire from it and my problem was solved , i havnt had any experience with the others , as they are working fine ,

Did you ever figure out the problem and get it fixed? My 98' is doing the same exact thing, it's driving me crazy, and of coarse the dealer is closed on the weekend...any info would be appreciated!!

I have not yet figured out the problem with the alarm. As I understand it Jeep has integrated the alarm into the rest of the system, to the point that unpluging a relay or fuse simply won't take care of the problem. Woe is me. My solution? not to engage the alarm: I mean, not to use the keyless remote. This is a sad development, but the neighbors are still angry about the late night alarm, and I am not about to take any chances. Overall, I have found that the dealer doesn't know much about the problem - that is unless I fork over lots of money. What other symptoms do you have? Let me know, I would like to figure this thing out. Cheers,
Preston

I was afraid the dealer wouldn't know much, thanks for confirming! I may try just out of desperation though. The only other symptoms the car has is the annoying dome light going on and off, can you imagine how I look driving down the street when its dark and my inside lights are flashing...oh and the doors are constantly trying to relock themselves. I appreciate the response and any other info you may come up with, I will do the same...

preston,a dead giveaway to your problem is what you said about the interior light going on while you drive.your problem is most likely one of the door jamb switches.thats pretty common on zjs.you might be able to figure it out by setting the alrm and after its armed go around to all the doors and push in and pull out on the handle to see if the alarm goes off.try the liftgate also.

a bad battery could cause the alarm to chip on & off too, by constantly reseting the computer

a bad battery could cause the alarm to chip on & off too, by constantly reseting the computer
Yeah but when he said while driving the interior lights come on, he's got problems with the door switch.

Hello everyone. I'm brand new here, but am having a bit similar problem w/my '98 GCLtd (5.9). I've written out the problem (VERY LONG!!) to other forums/help sites, but still can't get power to stay on in my ZJ. All power shuts off when I turn the key all the way to "crank." After that, I can hear the rear window lock (electrical) clicking and the relay for the instrument cluster in the fuse panel begins clicking/humming too. Power will "sometimes" come back, but as soon as I turn the key to crank, the whole scenerio starts over. Anyone have any ideas on this? Oh, not the battery or connections -- 12v & good/clean connect....

I have a 99 JGC.

I had the opposite problem -- could not get the alarm and interior lights to work!

Finally traced it to a burned out underhood lamp and fuse.

If you prefer to give up on troubleshooting your alarm problem, try the reverse of my fix, it very well may give you the desired quick result.

Further development.... yes the problem is definately the door switch not getting fully engaged because of a misaligned door....but when I took a closer look at it the sheet metal on the door where the locking mechanism is located I found that it is cracked, the locking mechanism is just kind of hanging there. I've never seen this happen. I've been calling around and body shops are telling me I will need a new door!! So now I'm looking at a new door, labor, painting= $1200 plus. Does anyone have any experience with this??...And if I decide to take this on myself and get my own door from a junk yard and try to install...are there any special tricks I should know about...power locks and power windows??

hi. im new in this forum and read that i have a related problem with the alarm in my 94 GC Ltd (i just bought this a week ago so i can drive through snow) so I'm not yet familiar with it. The alarm was triggered and i cannot disable it until my battery went dead. so i have to replace the battery but then the engine stalls immediately after starting. could this be related with the security/alarm system?

ron94

Well, it is quite a treat to figure this alarm out. I thought to myself, "Self, how bout' you forget about setting the alarm at all. Lock all the doors manually by reaching over to the drivers side door etc. Not fancy, but at least the alarm won't go off until I get it into a professional". However, the alarm set itself!!!
Can you imagine my surprise when I locked the doors manually only to find that the alarm set! Strange, my friends. I found a quick fix that won't bother the neighbors: I pulled the horn fuse. So if it goes off in the night, at least the neighbors won't get on my case. I wonder if pulling out the security module would help? Any thoughts on that? Also, someone mentioned grounding out a certain wire in the door. Could someone expound on that idea?
Cheers,
Preston

hi, i'm back.

i succesfully disarmed the security interlock by grounding the purple wire at the door wiring harness, as posted in one of the related topics in this forum. i found out that this wire was cut and this is the reason why i cannot disarm using the door keylocks.

i'm thinking of totally or permanently disabling the security interlock system as this is too much of a feature for a 94. is there a way to do this?

thanks in advance...

only buy keeping that wire grounded

Well, it is quite a treat to figure this alarm out. I thought to myself, "Self, how bout' you forget about setting the alarm at all. Lock all the doors manually by reaching over to the drivers side door etc. Not fancy, but at least the alarm won't go off until I get it into a professional". However, the alarm set itself!!!
Can you imagine my surprise when I locked the doors manually only to find that the alarm set! Strange, my friends. I found a quick fix that won't bother the neighbors: I pulled the horn fuse. So if it goes off in the night, at least the neighbors won't get on my case. I wonder if pulling out the security module would help? Any thoughts on that? Also, someone mentioned grounding out a certain wire in the door. Could someone expound on that idea?
Cheers,
Preston

Preston,

All of the problems that you are experiencing with you Jeep are happening to me also. My '96 JGC has all the same symptons and I have promised myself that today.. I will finally get this problem solved one way or the other.
In addition to the door locks cycling while driving, alarms in the middle of the night and all interior lights flashing while driving, I have noticed that the lights and door lock problems 1. Seem to be worse when the heater fan switch is set on higher speeds than low, 2. The problem always get worse and/or starts as I turn left while driving, and finally 3. that an outside ambient temperature of 30 degrees or below will bring on the problem. So far.. I have not experienced any problem above about 32-33 degrees but I thought that I should mention this as it may help in diagnosing this aggravating problem. I will check my door jamb switches today and get back with you here.. Meanwhile.. if you have discovered any fixes for this problem.. I would appreciate some further help myself.
Thanks,
Steven In Carolina

I found that pulling the horn fuse on my 94 4.0 also caused the airbag light to come on , and stay on , also when i needed the horn , it wasnt there , ALSO
I would suggest terying to disconect the damaged door alarm switch, might solve the problem for you and save a lot of trouble , it worked for me on my unreliable hood alarm switch , far as im concerned , wish the alarm system wasnt even installed ....

I did end up taking the horn fuse out. Saves waking up the neighbours. The alarm has not gone off for some time, that is good. After wiggling the door triggers and poking around, the problems seems to be better. But now I face another problem. If the alarm is set, the only way to disengage it is by using the remote to unlock the car. If I use the key, it just sets off the alarm. I am so amazed at how many suffer from Alarm problems. About grounding out the purple wire, what are the side effects? Also to Steven3, I do not recall many of your symptoms. I am beginning to think that the cold and rain may have something to do with it, but I'm still working through that. Keep me posted with your findings.
Preston

Preston,

All of the problems that you are experiencing with you Jeep are happening to me also. My '96 JGC has all the same symptons and I have promised myself that today.. I will finally get this problem solved one way or the other.
In addition to the door locks cycling while driving, alarms in the middle of the night and all interior lights flashing while driving, I have noticed that the lights and door lock problems 1. Seem to be worse when the heater fan switch is set on higher speeds than low, 2. The problem always get worse and/or starts as I turn left while driving, and finally 3. that an outside ambient temperature of 30 degrees or below will bring on the problem. So far.. I have not experienced any problem above about 32-33 degrees but I thought that I should mention this as it may help in diagnosing this aggravating problem. I will check my door jamb switches today and get back with you here.. Meanwhile.. if you have discovered any fixes for this problem.. I would appreciate some further help myself.
Thanks,
Steven In Carolina
I have the same problem and have noticed the same thing with regard to temperature

'98 jgcl - my problems consisted of alarm going off at night, lights flickering while driving and hatch back open notice beeping. The alarm thing only happened when the temp reached below freezing. My mechanic said there was water in the battery -or something - and freezing caused the alarm to go off. Replacing the battery fixed all of those problems....for a couple months. Now my alarm goes off at completely random times, the back door notice has started up again, and rear lamp failure notice. I was informed by a neighbor this morning that if I don't disable my alarm they'll put a brick through my window. I don't blame them, it sucks.

I know the yellow/purple wire will disengage the alarm, but aren't there two of those wires the same color? What happens when you splice the wrong wire.

my alarm would engage when trying to start the car, dealer solution replace all sensors $600, I noticed my lead battery terminal was extremely hot.. I cut off the old terminal replaced it with a new one, haven't had a problem since..of course i tried unplugging the hood sensor that didn't work..removed fuses 6 and 7 in the passenger side kick panel that didn't work..but a $2.50 battery terminal worked like a charm..i've since replaced all fuses and no problems..just an idea of what worked for me...