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故障现象:一辆2003款上海通用君威,因左前玻璃升降器故障来我厂维修,经检查,该车的玻璃停在中间的位置,按开关没有反应。故障诊断:首先检查玻璃升降器的保险丝,正常。拆开车门,拔下玻璃升降器的电机两线插头,串联一个试灯,按开关升降,试灯都正常亮,说明线路和开关都正常,肯定是玻璃升降器电机问题。因车主嫌我厂电机报价高,要求自己购买玻璃升降器电机。换上新的电机,原以为能交车了,可是又出现了一个新的故障:玻璃下降到底,升不起来。再次拔下电机插头串联试灯,按开关升,试灯都正常亮。为什么玻璃升降器电机上
Symptom: A 2003 Shanghai Regal General, because of the left front window regulator failure to my factory maintenance, after inspection, the car stopped in the middle of the glass position, press the switch no response. Troubleshooting: First check the fuse of the glass lifter, normal. Open the door, unplug the glass elevator motor two-wire plug, a series of test lights, press the switch, the test light are normal light, indicating that the lines and switches are normal, certainly the motor of the glass elevator. Due to the owner suspected that I plant high motor quotations, requiring their own purchase of glass hoist motor. Put on a new motor, thought to be able to make a car, but there is a new failure: the glass down in the end, or up. Again unplug the motor plug series test light, press the switch up, the test light is normal light. Why the glass lifter motor