Found it!! With the door open, look on the body of the car about 2 feet or so up from the ground. There is a thing that best I can describe as a black baby bottle nipple. When the door closes, it presses a button that is in this ruubery black thing. I have torn up my door so bad, sometimes mine doesnt close it all the way. I was going to tape something on the door where it will make sure it presses it until I get my door fixed, but tonite it was ok. I was looking for some kind of sensor before, not a button.