Abstract: An automobile theft prevention system in which an electrical ignition circuit includes a switch mechanism for opening and closing the circuit, and a switch-actuating mechanism that interconnects an ignition lock with the switch mechanism for closing the circuit when a first set of selected cams of the ignition lock are rotated, and for opening the circuit when any one of a second set of selected cams of the ignition lock is rotated. The switch-actuating mechanism includes a first set of flexible cables connecting the switch mechanism with a first set of selected cams, and a second set of flexible cables connecting the switch mechanism with a second set of selected cams. The system further has a hood lock mechanism including a hood lock.