分析如图所示灯光控制电路图,在汽车电瓶电压正常情况下,当打开灯光控制开关使其处于 HEAD LOW 位时,左侧近光不被点亮,右侧近光亮度正常;当开关处于 HIGH 位时,右侧近光亮度正常,远光亮度与平时相比明显不足,且仪表中的远光指示灯亮度也明显变暗,左侧远、近光灯丝同时呈现被通电烧红的现象,其亮度相当昏暗。请问,其可能原因有()。
A.
蓄电池存电量不足
B.
继电器触点接触不良
C.
左侧大灯保险熔断
D.
组合开关 HIGH 档位内部电路断路
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