My Ford Bronco had the Ford Security System installed and my underdash reset button broke. So in order to start the car...you had to press the unlock button on the doors or remote. I liked it, but it annoyed the crap out of people who worked on my car. The would come in saying...dude...your battery is dead. I woudl tell them to hit the unlock button on the remote and try again. They would be like..WTF?