I am havin the same exact issue....tested battery at advance auto parts voltage 13.05 measured cca 724 battery is rated at 640 cca and it was at 74 degrees MEH and i pulled the fuse and im bout to go to the nascar race so I will have to mess with it sunday maybe I am parking it on level ground and its the same issue to every detail as said in the first post, I might replace the siren so I can also get the chirp when unlocking and locking it......ive also let the car sit overnight with the battery disconnect and it still does this.