Arrangement of elements of a control system of windows with an electric drive
1 - ignition lock; 2 - power window switch; 3 – window regulator motor; 4 – window regulator motor; 5 - power window switch; 6 – window regulator motor; 7 - power window switch on the driver's door; 8 - connecting block No. 1 (fuse and main relay)
Main power window switch and status of contacts on the switch at various switch positions
Power window switch and the state of the contacts on the switch at various switch positions
The power windows only work when the ignition is on.
Each power window has a separate reversing motor. The position of the power window switch determines the polarity of the voltage supplied to the motor and determines the direction of rotation of the motor. On some cars, overload relays are installed in the power supply circuit of each window motor.
To test the operation of the main power window switch located on the driver's door, remove the electrical connector from the switch and remove the switch from the door.
Using an ohmmeter, check the short circuit of the switch contacts at various switch positions (see fig. Main power window switch and status of contacts on the switch at various switch positions).
To test the remaining power window door switches, remove the switch and, using an ohmmeter, check the switch contacts for continuity at various switch positions (see fig. Power window switch and the state of the contacts on the switch at various switch positions).
If the power window switches are OK and the power window does not work, check the power supply to the power window motor.
If power is supplied to the power window motor and the power window does not work, disconnect the door glass from the power window and manually move the glass to check for ease and smoothness of movement. If the glass moves easily, replace the window motor.