Welcome back,
A lot of people will never run these cars through an automatic car wash due to the spoiler leak issue so I recommend only hand washing it if possible from now on to minimize water intrusion.
I still think you have a siren issue. If you feel you can tackle that project let us know and we will walk you through disconnecting it. If that takes care of the alarm going off issue we will get you the part number for a new one that either chirps when you lock/unlock the door or not your choice.
I would like to know what that extra fuse goes to on the side of the illumination control.
what happens when you pull that fuse out?
We are here to help.