What are the common faults of power window regulators?
2 Answers
Common faults of power window regulators include: 1. Abnormal noise from the window when the car is driving on bumpy roads: Possible causes include loose screws or clips, foreign objects inside the door trim panel, or excessive clearance between the window and the sealing strip; 2. Abnormal noise during window operation: This is usually due to debris in the window regulator guide rail, which can be resolved by cleaning the guide rail and applying some lubricant; 3. Difficulty in window operation: This is often caused by aging or deformation of the window sealing strip, which creates resistance when raising or lowering the window, requiring replacement of a new sealing strip; 4. The window automatically lowers after being raised halfway: This may be due to issues with the sealing strip or the power window regulator, and is commonly encountered in cars equipped with anti-pinch functionality for the windows.
With over 20 years of experience in car repairs, I've seen power window regulator failures all too often. The main issues boil down to four common faults: malfunctioning switch buttons, burnt-out motors, broken lifting brackets, and aging wiring harnesses. If the switch doesn't respond when pressed, it's usually due to worn contacts or a stuck button. A faulty motor will prevent window movement, leaving it stuck halfway with a buzzing sound, likely from overheating and internal rust. When plastic components in the lifting bracket age and crack, you'll hear loud knocking noises during operation. Loose wiring harness connections or water-induced short circuits can cause overheating and even smoke. Older vehicles are more prone to these issues, especially during hot summers or after car washes when moisture accumulates. For diagnosis, start by testing the switch, then check the fuse. If the bracket is broken, you'll need to replace the entire assembly. For maintenance, regularly lubricate the tracks with grease, and avoid reaching outside the window to prevent foreign objects from jamming. Ignoring these faults can lead to water leaks, drafts, and interior damage – always prioritize safety and address issues promptly.
