Due to poor driving habits, the car window glass cannot be raised or lowered normally

A Volkswagen Santana entered the store, and the owner reported that the window glass could not be raised and lowered normally. It is unclear whether it is a problem with the lifter switch or the lifter.

When the driver received the car, the glass in the driver's seat was below, and pressing the lifter did not respond at all, nor could it control the lifting of the window glass in the passenger's seat.

The following picture shows the state of the car when it first entered the store. The window glass of the driver's seat is inside the car door and can no longer be seen.

Opening the door panel reveals the interior of the car door. At this point, the window regulator motor has been removed and tested to be normal. The regulator switch is still on the door panel.

The low-end model only has two front door switches, and the two buttons below the switch are for locking and unlocking the car. The master connected the switch separately, and during testing, it was found that pressing the switch did not result in no response. Occasionally, the car window glass would move, possibly due to a problem with the contact inside the switch.

So, the master opened the switch of the elevator and found that the circuit board inside was corroded. Corrosion only occurs when water enters

The master tried sanding the corroded circuit board with sandpaper to see if it could still be used. Please note that the yellow contacts on the circuit board should be made of metallic copper, and this circular copper block is not connected in the middle, which is equivalent to two semicircles.

The master tried to touch the copper circle with a screwdriver, which was equivalent to connecting the circuit. However, only the window lift of the passenger seat window worked, and the driver's seat did not. This indicates that there is a problem with the circuit board, possibly due to damage to some components.

After such a simple inspection, we have determined that it is the problem with the elevator switch, and replacing the switch can solve the problem.

Finally, the master said that the damage to this glass lifter was due to the car owner's carelessness when using the car (the owner stated that the door panel had been exposed to rain multiple times), and water entered the circuit board inside the lifter, causing corrosion and damage to the circuit board.

After understanding the reason, the car owner stated that they will make changes in the future and try not to let the door panels get wet. In daily use, we should try to avoid water entering the inside of the door panel to reduce the probability of window failure.