单选题当给车门上锁时，门锁均不工作。当上锁时，经检查门锁继电器线圈电压为12V。故障的原因是（）。A门锁继电器触点接地断路B左前门锁电机电枢断路C主电源继电器绕组之间断路D与门锁开关相接的熔断丝熔断
单选题
当给车门上锁时，门锁均不工作。当上锁时，经检查门锁继电器线圈电压为12V。故障的原因是（）。
A
门锁继电器触点接地断路
B
左前门锁电机电枢断路
C
主电源继电器绕组之间断路
D
与门锁开关相接的熔断丝熔断
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