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故障现象一辆未上牌的英伦SC5新车,开左侧转向灯开关时整个左侧的转向灯都不亮,右侧转向灯开关正常;开应急灯开关也是左侧转向灯不亮,右侧转向灯正常。故障分析为了快速排除故障,首先查看了该车转向灯控制系统电路图(图I),以期对该系统有所了解。从图l中可以看出,只要BCM连接器IP47上端子1和端子2分别通过转向灯开关搭铁,那么BCM通过连接器IP48的端子7和端子8以一定的频率给左侧和右侧的转向灯供电,因为右侧转
Symptoms An unmanned British SC5 car, open the left turn signal switch when the entire left turn signal is not bright, the right turn signal switch is normal; turn on the emergency light switch is the left turn signal is not bright, the right turn Light is normal. Fault Analysis In order to quickly eliminate the fault, first check the car turn signal control system circuit diagram (Figure I), in order to understand the system. As can be seen from Figure l BCM connector IP47 terminal 1 and terminal 2, respectively, by turn signal switch grounding, BCM through the connector IP48 terminal 7 and terminal 8 at a certain frequency to the left and right Turn light power supply, because the right turn