| 摘要 |
A microprocessor based control detects actuation of the vehicle's braking system and compares the actual magnitude of the lamp current drawn by the system's brake lamps during illumination with reference signals indicative of the nominal value of brake lamp excitation current required for illumination of a full complement of brake lamps and that associated with successively lesser numbers of operating lamps, to determine the presence and number of inoperative lamps and to record the existence of failed lamps in memory which may be accessed by external diagnostic equipment.
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