1. Check Electrical Connections:
- Verify that the electrical connections for the passenger window switch are secure and free from corrosion. Use a flashlight and look for any loose wires or damaged connectors.
2. Test Window Switch:
- Swap the passenger side window switch with the driver's side switch. If the passenger window now works with the driver's side switch, it indicates that the window switch is faulty and needs to be replaced.
3. Check Power Supply:
- Use a multimeter to check if there's power supply to the passenger side window switch. Turn the ignition key to the "ON" position and measure voltage at the switch connectors. The multimeter should read around 12 volts.
4. Test Window Motor:
- Disconnect the electrical connector from the window motor and apply 12 volts directly from a battery or power source to the window motor terminals. If the window motor operates when connected directly to power, it indicates that the window motor is functional and the issue may be with the switch or wiring.
5. Check Window Regulator:
- If the window motor operates when powered directly but not when connected to the switch, the issue may be with the window regulator. Inspect the regulator mechanism for broken gears or obstructions that might prevent the window from moving.
6. Check Wiring:
- Inspect the wiring harness between the window switch, motor, and door control module. Look for broken or damaged wires, especially those that have been exposed to wear and tear.
7. Test Door Control Module:
- If the window switch, motor, wiring, and regulator seem functional, the issue might be with the door control module. However, troubleshooting the door control module may require specialized knowledge and equipment.
Remember that if you are uncomfortable working with electrical circuits, it's advisable to consult a professional mechanic or auto electrician to inspect and repair the faulty components of your vehicle's window mechanism.
