Sequence of work
1. If the power windows fail, check the fuses under the rear seat first.
2. If everything is in order, remove and check the switch.
3. If the switch is OK, check the wire going to the door. To do this, remove the door upholstery, remove the connector and, with the switch pressed, check for voltage on the electric motor. «Plus» And «minus» on the wire have a changing polarity depending on whether the glass is raised or lowered.
5. If everything is in order with the voltage, then a failed electric motor remains a possible cause. Replace it.
6. Difficulty moving one of the glasses can be caused by jamming in the door guides.
7. If only the rear windows do not work, check the child safety switch.
8. If all options have been tried, the fault is with the comfort relay or the central locking system.