Re: alarm sounding
YIKES!!!!!
You paid $220 for the siren module? It is a $100 part. Well could be a couple of things, First off have you replaced the battery? If you are still running on the white Varta battery then change it out. They make everything freak out! These cars are very sensitive to the electrical voltage.
The Issue 180 brought up should be first on your list after Battery and Siren, both of which you have done. I have also heard recently of a lot of Ground cables going bad. they are getting corroded on cars in wetter climates. This can cause a variety of issues including security system misfires. I am fairly certain it is not a door switch, and since a Chrysler dealer mentioned it, then it probably isn't. ( stop taking your car to Chrysler dealers, your car is not a Chrysler.)