My car was iin my parking place around 5:00 PM, no body around when a jet goes over and boom. Now the alarm goes off, can not turn it off fob does not work. I could manually unlock the doors but the car would not start. Thougt of disconnecting the battery. Real bad idea. Called the wife to bring two more fobs, and new batteries. Still nothing but a loud noise. Finally a friend was sitting in the car playing with the switches. He hit the Tow Switch a couple of times. The alarm stops, the fob and now the car starts. I was amazed. Then I look at the forum and the book, there it was, It had to be the Tow Sensor.
Again Good Luck...