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What causes the rear car window to fail to roll up or down while the front two work normally?

1 Answers

GiannaRose

07/30/25 10:02am

When the rear car window fails to roll up or down while the front two function normally, the specific reasons are as follows: 1. Damaged window lift motor or poor contact in the electrical wiring harness: If there is a burnt smell when holding down the window button or unusual noises inside the door panel, it is likely that the window lift motor components are damaged. 2. Motor overheating protection: To protect the power supply circuit, window lift motors generally have an overheating protection mechanism. If components overheat for some reason, the motor will enter an overheating protection state, causing the window to stop functioning. 3. Clogged tracks or aging rubber seals: Most cases of window glass failing to move are caused by mechanical jamming. Simply cleaning the tracks and applying some lubricant can help. If the issue is due to aging or deformation of the glass rubber seals, new sealing strips need to be replaced. 4. Lost initialization data: Disconnecting the battery or cutting power to the window control module during maintenance of other systems can cause the window's initialization data to be lost, preventing the window from functioning. 5. Damaged window regulator switch: The car window switch is used very frequently, almost every time the car is driven, making it a wear-prone component.

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