What is the reason why the right rear window can only go up but not down?
3 Answers
There are several reasons why a car window cannot be raised or lowered: one is the aging and deformation of the glass sealing strip, which requires replacement of a new seal or application of talcum powder for lubrication if not severe; another is dirt or foreign objects in the window lifting guide rail, necessitating cleaning and application of grease; and another could be motor failure or low battery power, requiring charging or motor replacement. Additional information is as follows: 1. Introduction: The production of automotive glass involves heating the glass to near softening temperature in a furnace, then quickly transferring it to air grids with varying cooling intensities for uneven cooling, creating different stresses between the main viewing area and the peripheral area. Generally, this process produces zone-tempered glass. 2. Classification: Automotive glass mainly falls into three categories: laminated glass, tempered glass, and zone-tempered glass, all capable of withstanding strong impacts. Automotive glass is also classified by location into four types: windshield, side window glass, rear windshield, and sunroof glass.
The right rear car window can only go up but not down, which is usually caused by several issues. The switch button may be worn out or have water damage, leading to poor contact and only recognizing the upward signal. Additionally, the window motor may be stuck or obstructed by debris, with insufficient lubrication being a common cause of this malfunction. In terms of wiring, a short circuit or break in the downward circuit is often due to aging or cracked wiring inside the door panel. Another possibility is a malfunctioning control module, which prevents signals from being transmitted to the motor. I recall encountering a similar situation before, where the motor was more likely to be faulty because it is responsible for bidirectional movement. Loose connectors inside the door can also interfere with signals. It is recommended to first test the switch for responsiveness—if pressing down yields no reaction but the upward function works, it is likely a switch or wiring issue. It’s best to consult a professional technician for a multimeter test to avoid exacerbating the problem by attempting DIY repairs. Regularly cleaning the window tracks can prevent debris from getting stuck. During inspection, don’t overlook potential deformities in the glass guide rails or obstructions blocking movement. In summary, this issue affects convenience and safety, so it’s best to address it promptly.
It's really annoying when the right rear window only goes up but not down! From experience, I know the switch button is the most common failure point – pressing down does nothing, but going up works fine. The motor could also be faulty because it has a gear system; when worn in one direction, it only allows upward movement. Wiring issues include loose connections or damaged harnesses in the door seam, especially common in older cars. I've tried opening it myself – excessive dust can jam the tracks, requiring cleaning. Additionally, a faulty control module can cause signal confusion, more noticeable on rainy days. Although rare, a blown fuse can also cause similar issues. Quick fix: Try repeatedly pressing the switch to see if it resets; if not, check the door connections. If the safety lock is activated, check the child lock settings. Regular maintenance of window rubber seals and tracks can prevent this. Remember, avoid forcing the window to prevent motor burnout. Get it fixed soon – poor ventilation is a hassle.
