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Re: 2000 bettle 2.0l alarm randomly goes off
Removing the alarm is not a viable solution because the computers on car moitor the locking system. the problem you have is the rear latch is malfunctioning, the plastic cover over the latch sometimes breaks and a small piece of plastic get in the lock linkage and jams it remove the latch and look for it to be jammed if so dig out the plastic piece and reinstall. if no plastic pieces jamming it replace the rear latch
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I do not know how to "fix" the problem to make it right, but you can disable the alarm through the relay box or fuse box. You'll lose the alarm, but can lock the car. Several may be labeled "Alarm and... try to find one that is the alarm alone or something significant, if possible. Not an answer, just an Idea.
This problem can be caused by a few things, it could be the rear door lock switch or lock module located under the dash or last the rear door actuator.
You say that all door lock and unlock on there on, this tells me it most likely has a module problem or wiring to the rear door is bad. The first thing i would do would be to remove the rear door panels and check wiring to switches and actuator, then follow wiring from inside the rear hatch to where in goes through the body. the wiring most times breaks at that point where the wiring is bent over from opening and closing rear door ,
Locate the wiring going into door or doors. sometimes the wiring only goes into one door but then sometimes in goes into both doors, check the wiring closely . it may be covered in a rubber boot . if it is covered you will need to slide boot back to check wiring.
over sensitive sensor in the car could set it off randomly... bonnet boot, door handles.. one of the motion sensor thingiis, if fitted. the beeper issue could be the position of the incoming sensor of the alarm it self.. if it is an imboliser as well then there is whole other range of issue.. turn it off or at least disconnect the siren.. or you could just pay some one way too money to fix the problem for ya... good luck
On a 91 Cherokee, grounding the ORANGE/GREEN wire from the drivers door lock sensor will permanently disable the OEM alarm. Do NOT try other methods as it will cause the system to lock down. If that happens, nothing short of a dealer reset or completely removing the electronic control system will allow you to start it.
the factory fit alarm is not voltage sensing .The best advice is to go to VW garage and get them to read the alarm causes,(they can check the last 4).this will give you a good idea where the fault lies.ie door lock mechanism,interior monitor etc..You cannot start looking for problem until you know alarm cause..
My 1991 Lexus LS 400 does something similar. When the alarm goes off I use the key to unlock the passenger side front door and it turns the alarm off. Go figure, I know it sounds funny but it solves the problem for me.