how to fix the power windows that won't work in my Volvo XC90?

Solution

1. Preparation

• Gather Tools: OBD-II scanner, multimeter, socket set, flat-head screwdriver, trim removal tool.
• Safety Warning: Disconnect the battery before working on electrical systems.

2. Check and Replace Fuse

• Locate the fuse box (usually under the dashboard or in the engine compartment).
• Identify the power window fuse using the diagram on the fuse box cover.
• Remove the fuse using pliers and inspect it for continuity. Replace it if it’s blown.
• Reconnect the battery and test the window operation.

3. Test and Replace Window Switch

• Remove the door panel using a trim removal tool and screwdriver.
• Disconnect the window switch connector.
• Use a multimeter to check for continuity across the switch terminals when pressed.
• If faulty, replace the switch with a new one.
• Reconnect the switch and reassemble the door panel.

4. Inspect Wiring and Connectors

• Visually inspect the wiring harness for any fraying or damage.
• Check connectors for corrosion or loose connections.
• If any damage is found, repair or replace the affected wiring or connectors.

5. Test Window Motor

• If the switch and wiring are okay, check the window motor.
• Remove the door panel again and connect a multimeter to the motor terminals.
• Activate the switch and check for voltage at the motor.
• If there is voltage but the motor does not operate, replace the window motor.