my Volvo XC90's windshield wipers are working intermittently what's the issue

Solution

1. Preparation

• Tools Required:
  • Screwdriver set
  • Multimeter
  • Wrench set
  • Pliers
• Ensure the vehicle is parked on a level surface and the ignition is off. Disconnect the battery to prevent electrical shock.

2. Check and Replace the Wiper Control Switch

• Remove the steering column cover using a screwdriver.
• Disconnect the electrical connector from the wiper control switch.
• Use a multimeter to test the switch for continuity in all positions (low, high, and intermittent).
• If faulty, replace the switch with a new one, reconnect the electrical connector, and reassemble the steering column cover.

3. Inspect and Replace the Wiper Motor

• Locate the wiper motor, typically found under the cowl panel at the base of the windshield.
• Disconnect the electrical connector from the wiper motor.
• Use a wrench to remove the mounting bolts securing the motor.
• If the motor does not operate when voltage is applied, replace it with a new wiper motor.
• Reinstall the new motor, reconnect the electrical connector, and secure it with the mounting bolts.

4. Check Wiper Linkage

• Remove the wiper arms by loosening the nuts using a wrench.
• Inspect the wiper linkage for wear or damage; ensure it is properly connected to the motor.
• If any part of the linkage is damaged, replace the linkage assembly.

5. Test and Reassemble

• Reconnect the battery and test the wipers to ensure they operate correctly in all settings.
• Reinstall the wiper arms in the correct position, ensuring they are locked in place.