my Volvo XC90's windshield wipers are not working what could be wrong

Solution

1. Preparation

• Gather tools and parts: OBD-II scanner, multimeter, socket set, replacement fuses, and wiper motor if necessary.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shock.

2. Inspect and Replace the Fuse

• Locate the fuse box (typically under the dashboard or in the engine compartment).
• Remove the cover and find the fuse for the windshield wipers (refer to the owner’s manual for the exact location).
• Inspect the fuse: if it is blown, replace it with a fuse of the same amperage.

3. Test and Replace the Wiper Motor

• Reconnect the battery and use a multimeter to check for voltage at the wiper motor connector when the wiper switch is activated.
• If no voltage is present, trace back the wiring to identify any breaks or shorts.
• If voltage is present but the motor does not operate, remove the motor from its mounting:
  • Disconnect the wiring harness.
  • Remove the mounting bolts using a socket set.
• Install the new wiper motor:
  • Position the new motor in place and secure it with the bolts.
  • Reconnect the wiring harness.

4. Inspect and Repair the Wiper Linkage

• If the wiper motor is functional, inspect the linkage:
  • Remove the wiper arms by pulling off the caps and loosening the nuts with a socket set.
  • Remove the cowl cover to access the linkage.
  • Check for any binding or disconnections in the linkage.
• Lubricate moving parts if necessary, or replace any damaged components.

5. Reassemble and Test

• Reassemble any components removed during repair.
• Ensure that all connections are secure and no tools are left in the engine compartment.
• Reconnect the battery.