| 摘要 |
PROBLEM TO BE SOLVED: To provide a marker lamp device capable of monitoring a state of an individual marker lamp when a plurality of marker lamps are energized from a common constant current output device.SOLUTION: When any one of solid light-emitting elements 5 is open or is failed by short-circuit, a detection signal of monitoring means 20 corresponding to the failed solid light-emitting element 5 exceeds a predetermined range. Then, a controller 17 determines it as abnormality, closes corresponding short-circuit means 21, and outputs an abnormal signal to reporting means 23. |
