Originally Posted by
bobhoernlein
alarm unit was acting funky. It went off with a weak sounding alarm sound. I opened the door manually and tried to start the car but couldn't. I disconnected the battery, reconnected and it stopped. I read on the forum from other owners that the alarm siren unit has batteries and when they start to go they leak on the printed circuit board and that makes the unit act weird. So I replaced it and my issues went away except for this occasional alarming for no apparent reason.
What I am getting at is did it act the same then as now except for the sound level? I am suspecting it did.
I am trying to find out if this is a new problem or a noisier old problem.
Have you looked for water in the trunk? The pump module is an integral part of the security system and if water has got into the well were the unit sits under the foam in the trunk you may find that is the problem. Look in the well under the trunk mat, water may be visible down the gap between the foam and the trunk well, use a paper towel and slide it down the crack.