Factory alarm goes off after many hours of sitting!

[myblack98gst]

okay I have owned the car since june 03'.. and NEVER had this problem before.

the other night at 4am I get woke up to my alarm going off in my driveway. I freaked because..well, someone is breaking into my car! NO after gtting dressed finding a "soul pole" go outside and the car is all intact.. I shut it off with the key just fine and go back to bed. 10am it goes off again, again for no apparent reason. I left it unlocked since then. today at 3:30pm I got home and locked the doors just to see if it would go off.. sure enough 12:20am it goes off. If you notice it happens in about the same amount of time each time?!?!?


WTF!

I checked the ECU pinouts nothing to do with that has any connection with the ECU.

heres what my possibilities are at this point.

1. passenger door switch has been iffy on coming on when the door is opened maybe it shorts randomly and sets it off.

2. cats love to get on my hood maybe when thhey jump off or on it hits the hood switch enough to trigger it.. (but they get on there during the day with no alarm)

3. dont know.



where is the alarm module located, I have a parts car I may be able to get one off.


or do you have any clue?

Big sale on punctuation marks 'round your way? One's plenty.

 

[DrunkPenguin]

The factory alarm does not have a motion sensor, so its not cats. I had this problem a couple years ago and it was the door switch. The way the factory alarm works, if it senses a door has been opened without first unlocking via key or remote the alarm goes off. role your windows down and turn the alarm on, wait a few mins and open the door from the inside, youll see what im talkin about. I cant remember if the door buttons are adjustable, I think I just replaced mine and it fixed the problem.



John

 

[AWDPetmitsu]

The hood switch being out of position is a common cause, also.

 

[ArticNemesis]

The hood switch being out of position is a common cause, also.

Sometimes the actual plastic plunger gets stuck at an angle inside the rubber boot.. Mine would go off hours after I would leave my car.

 

[mattinthebox]

Just a thought...
Have you done a load test on your battery?

I have experienced a problem like this on 3 seperate occasions, where an alarm would trip late at night.

It happened to my 90 laser, my brothers 85' vette & his 84' cadillac.

I had no clue that the battery was going bad, till the cold temps at night would make the voltage drop, which in turn would trigger the alarm.

 

[GSX97AWD]

Same thing happend to me my alarm would sound at four oclock in the morning it was a very simple fix 1. pop the hood 2. above the driverside headlamp is a little push down switch, push in the clip and remove it. 3. close hood and wait for alarm to go off

If it still goes off witch i highty doubt, your having a bigger problem, at frist i though my alarm contol module was defective but once i pulled the hood sensor it never went off again

Tom

 

[housegsx]

The hood switch being out of position is a common cause, also.

I used to have this problem. Pop the hood and either bend up the switch bracket a little or remove it and put a couple washers under it to raise it up some.