alarm goes off randomley
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Joined: Mar 2004
Posts: 3,385
From: oburg S.C.
alarm goes off randomley
Ok I was sitting in my house last night about 3 hours after I got home and my alarm just start blaring. So i go cut it off and nothing was wrong! So about o say about 4 am it wakes me up out of my sleep going off again.I check and once again nothing is wrong. What could i check or what would cause it to go off for no reason?
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It's probably your trunk lock switch
I am guessing you have a spoiler on the trunk. There is a TSB on this. The trunk lock switch gets wet and shorts out you lock switch. What I did was open your trunk lid. gain access to the switch located behind trunk latch and unplug it and if this was your problem, the alarm won't go off anymore. Mine did the same thing yours is doing and I have no more alarm. I never did get around to buying a new one but figure not many thieves pry the trunk lid open anyway.
Alarm Thread
Hi there:
I had the same problem on my 98 SE and I posted a thread some time ago. You should still be able to look it up. I agree with the last member's post that if you have a factory spoiler, sometimes water can get in the trunk through the spoiler mount holes and short out that switch. But simply unpluging a switch only masks the problem. You have to understand that there are actually three (3) switches in the trunk. 1 for the alarm on the lock cylinder, 1 for the trunk light and 1 for the trunk release actuator. My short was in the trunk light switch which is part of the trunk latch. You will have to look up the TSB and it shows a diagram of the trunk area. I also had some corrosion on the trunk lock cylinder switch. I was able to clean off the corrosion and spray some WD-40 in both switches to help keep out the moisture. You can try that unless yours are completely corroded. If your trunk lock cylinder is stuck as most are on our cars w/ keyless, you can try and spray some penetrating oil inside the cylinder and on teh rear of teh cylider itself and let it soak. Then, insert your key and use a pair of plyers with a soft rag over your key and gently work it side to side until it moves freely.
The next step is to figure out which holes are letting the water in. If you pull back the upper trunk lid cover, you will be able to see the two sets of inner spoiler studs and bolts. My guess is that is where the leak is coming from. Depending on how loose your spoiler is, you may be able to spray the studs and nuts with PB Blaster, etc. to allow the nuts to be snugged tight without snapping them off. Don't try and tighten them dry or you will snap them right off.
If you are able to snug both inner nuts tight, then go ahead and run a heavy bead of silicone around each nut on the inner studs and also around the plastic mount clips on each end of the spoiler. NOTE: if the sides of your spoiler are getting loose and flopping around, you may have to replace the clips. You will snap those mounting clips right off no matter how careful you are if you pull up on the spoiler. The info on the clips is in my post.
So far, so good on my car. It's been over a year and no ghost alarm in the middle of the night.
Good luck!!
Ted, Chicago
I had the same problem on my 98 SE and I posted a thread some time ago. You should still be able to look it up. I agree with the last member's post that if you have a factory spoiler, sometimes water can get in the trunk through the spoiler mount holes and short out that switch. But simply unpluging a switch only masks the problem. You have to understand that there are actually three (3) switches in the trunk. 1 for the alarm on the lock cylinder, 1 for the trunk light and 1 for the trunk release actuator. My short was in the trunk light switch which is part of the trunk latch. You will have to look up the TSB and it shows a diagram of the trunk area. I also had some corrosion on the trunk lock cylinder switch. I was able to clean off the corrosion and spray some WD-40 in both switches to help keep out the moisture. You can try that unless yours are completely corroded. If your trunk lock cylinder is stuck as most are on our cars w/ keyless, you can try and spray some penetrating oil inside the cylinder and on teh rear of teh cylider itself and let it soak. Then, insert your key and use a pair of plyers with a soft rag over your key and gently work it side to side until it moves freely.
The next step is to figure out which holes are letting the water in. If you pull back the upper trunk lid cover, you will be able to see the two sets of inner spoiler studs and bolts. My guess is that is where the leak is coming from. Depending on how loose your spoiler is, you may be able to spray the studs and nuts with PB Blaster, etc. to allow the nuts to be snugged tight without snapping them off. Don't try and tighten them dry or you will snap them right off.
If you are able to snug both inner nuts tight, then go ahead and run a heavy bead of silicone around each nut on the inner studs and also around the plastic mount clips on each end of the spoiler. NOTE: if the sides of your spoiler are getting loose and flopping around, you may have to replace the clips. You will snap those mounting clips right off no matter how careful you are if you pull up on the spoiler. The info on the clips is in my post.
So far, so good on my car. It's been over a year and no ghost alarm in the middle of the night.
Good luck!!
Ted, Chicago
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