Chrysler Repair: Security System on 99 Chrysler concorde, chrysler concorde, light dimmer

Question
I have a 99 Chrysler Concorde 3.2L engine. I has about 150k miles on it, but I doubt it has anything to do with this.
2 weeks ago my car was sitting outside after a thunderstorm and the alarm started going off. It had already stopped raining but everything was still very wet. I went out, unlocked the doors with the remote and relocked them and it stopped, then 10 minutes later it started the alarm again. I went and locked the doors manually and waited for it to dry out. I called the dealership who had worked on the window(wasn't going up in the track) on the drivers door a week before and explained the problem and asked if it was possible that when they were working on the door if something had gotten not put back right, wet, and was setting off the alarm. I brought it in, they looked at it, said everything was fine and sent me on my way.
I've had it locked off and on since then, with the alarm activated, no problem. 2 days ago I washed it at a do-it-yourself carwash, brought it home and it's been sitting in the garage. Weather has been in the 80s so I'd think it would be dried out.
Tonight I was at the store, and came out, put groceries in the trunk, shut it, and started to walk away and the alarm went off. I unlocked and relocked the doors with the remote and it shut off. After getting home, I went and played with it in the garage, and I can repeatedly lock it with the remote, open the trunk with the remote, shut the trunk and the alarm will go off.
I don't remember this being the behavoir of the alarm before, I can remember being in the trunk with the car locked and not having the alarm go off.
Is the working on the drivers door just a coincidence? Am I having mass electrical problems? The car has no other electrical quirks except the interior light dimmer being a bit jumpy on occasion.

Answer
Hi Mark,
If the issue doesn't seem to directly involve the driver's door in the strange behavior then I would think it a coincidence. The two things I am thinking about are first the possibility that water is getting in around the windshield a dripping down on the body control module and producing temporary short circuits that make one believe there are "gremlins" in the car. The body control module is on the back side of the junction block (fuse box) under the dash. The pins for the theft system are on a 16-pin blue color plug. So you might take a look at that plug and socket to see if it shows any moisture or crud and if so spray it with some electrical circuit cleaner which will evaporate the water and clean the contacts.
Second, the trunk lid is part of the security system to the extent there is a plug on the rear of the lock cylinder and if the lock cylinder is forcibly removed it will release that plug and set off the alarm. You might check that plug to make sure it is secure and maybe also check it for dirt/water/corrosion.
The main issue with driver's door would be if you couldn't cancel the armed or alarmed state by using the door lock cylinder with your key. If that is OK then other than the door not being latched tightly, which will set off a false alarm, there should be no damage from the dealer repair. You could try pulling out on the door when the system is armed and if the door latch is not in-board far enough that would cause a false alarm. Then you could loosen the striker plate on the door frame and move it inboard to remove that play in the door.
I hope these suggestions are helpful. At least you haven't had the problem of not being able to start the car due to it not wanting to cancel the alarmed state. So count your blessings!
Roland