Control system for brake lights on vehicle, comprises permanent magnet attached to moving internal wall of brake servomotor and adjacent magnetic sensor fixed to external servomotor case

摘要

A magnetic sensor (40) and box (42) containing signal processing circuits are fixed to the casing (34) of a servomotor (14) using an orifice (44). A permanent magnet (38) is attached to the moving inner wall (22) of the servomotor such that it is normally adjacent to the magnetic sensor. When the brakes are applied the magnet moves away from the sensor which detects the change and operates the brake lights (52)