故障现象一辆2005年产沃尔沃XC90车,搭载2.9T发动机,累计行驶里程约为22万km。车主反映,只要接通点火开关,刮水器就会自动工作。故障诊断接车后试车,接通点火开关,发现刮水器确实会自动工作,偶尔会停止一会儿,且停止位置不固定,然后继续工作。尝试旋转刮水器开关,发现刮水器不受控制。打开发动机室盖检查,发现在刮水器自动工作 Symptom A 2005 Volvo XC90 car, equipped with 2.9T engine, accumulated mileage of about 220,000 km. Owners reflect, as long as the ignition switch is turned on, wipers will automatically work. TROUBLESHOOTING Tested after the car was turned on, the ignition switch was turned on, and the wiper did indeed work automatically, occasionally stopped for a while, and the stop position was not fixed and then continued to work. Try rotating the wiper switch to find the wiper uncontrolled. Open the engine room cover inspection and found that the wiper automatically work