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故障现象一辆江淮和悦三厢轿车,行驶里程约为3万km。据驾驶人反映,拉起驻车制动手柄时中控自动解锁,此时将点火开关置于ON位,洗涤器会自动喷水;完全释放驻车制动手柄时中控自动闭锁,同时组合仪表上的驻车制动指示灯微亮。故障诊断分析故障现象,由于同时出现几个电器故障,初步推断这几个电器的电源线路正常,而其搭铁线路出现同时对搭铁短路的故障。为了快速找到故障位置,决定从检查洗涤器的控制电路入手。查找该车洗涤器控制电路。由图1可知,图中红色部分
Fault phenomenon A JAC and Wyatt sedan, driving mileage of about 30,000 km. According to the driver reflected, pull the parking brake handle automatically unlock the central control, then the ignition switch ON position, the scrubber will automatically sprinkle water; fully release the parking brake handle automatically lock the central control, while the combination The parking brake light on the instrument is slightly bright. Fault diagnosis and analysis of the phenomenon of failure, due to several electrical failures at the same time, initially concluded that several electrical power lines are normal, while the ground line at the same time appear on the ground short-circuit fault. In order to quickly find the fault location, decided to check the scrubber control circuit to start. Find the car scrubber control circuit. Can be seen from Figure 1, the red part of the figure