2. The windows can be controlled from the central switch panel located in the driver's seat or from individual switches located on each door. Each window lifter is driven by a separate reversing electric motor. The position of the control switch determines the polarity of the current supplied to the electric motor, resulting in the glass being raised or lowered.
3. The window lift circuit is protected by a fuse and a circuit breaker. Each electric motor has an integrated circuit breaker, so failure of one of the window lifters does not result in the shutdown of the other electric motors.
4. The windows only function when the ignition switch is in the ON position. In addition, many models have a switch on the driver's control panel that can be used to turn off the rear door windows and sometimes the passenger door window. Please take the following features into account before you begin testing the functionality of your window lift system,
5. The following procedures identify general system faults, so if the fault remains undetected after the above checks, take the vehicle to a service station for in-depth diagnostics.
6. If the power windows do not work, first check the fuse and circuit breaker.
7. If the rear windows do not work or are controlled only by the switches from the driver's seat, make sure the locking switch closes the circuit in the unlocked position. If the switch does not close the circuit in the unlocked position, replace it.
8. Inspect the wiring in the circuit section from the switches to the fuse panel. Replace the wiring if necessary.
9. If only one window is not controlled from the driver's seat, try operating it using a separate switch located on the corresponding door.
Note: This recommendation does not apply to the driver's door window.
10. If the window is operated by only one switch but not by the other, test the ability of the inoperative switch to complete the circuit.
11. If the switch closes the circuit, check for an open or short circuit in the circuit between the switch and the motor.
12. If the window lift is not operated by any of the switches, remove the trim panel of the corresponding door (see chapter 11) and check the voltage supply to the switch and the electric motor when the switch is in the working position.
13. If there is voltage supplied to the electric motor, disconnect it from the window lift mechanism (see chapter 11) and try to move the glass manually to make sure it is not jammed in the guides. Also make sure that the window lift mechanism is not jammed or damaged. If the mechanism is not damaged and the glass moves freely in the door guides, replace the electric motor. If the glass is jammed in the guides, or the window regulator mechanism is jammed or damaged, lubricate, repair or replace the mechanical parts.
14. If voltage is not supplied to the motor, inspect the wiring in the circuit from the switch to the motor. When checking, refer to the relevant electrical diagrams. If a relay is included in the circuit, make sure that it is securely grounded and that voltage is supplied to the relay.
15. Check the functionality of the window lifts to confirm the effectiveness of the repair.
Original version of the article on the website CHEVYMAN.RU