Abstract: A device for signaling a hard braking of a motor vehicle utilizing an electrical switch for controlling the energization of a hard brake warning light which operates in conjunction with the conventional motor vehicle brake light. The switch is mounted so as to be actuated when the brake pedal of the motor vehicle is depressed by more than a predetermined amount. Actuation of the switch is by a bracket carried by the brake pedal and which includes an inclined surface thereon. The actuating lever of the switch includes a roller that rides upon the inclined surface.