[jaclaz]

I remember (in the late '70's or maybe early '80's) a friend's car where he added (it was not unusual at the time to add "accessories" to cars, like fog lights or rear lights ) a number (four or five) lever switches (connected in serie) that acted like a dip-switch, you had to set them in a given pattern (like up-down-up-up) to be able to start the car.