Front or Rear Windshield Wipers Fail to Operate. INFORMATION The following troubleshooting hints are based on known areas that can cause the situations described above to occur. 1. Front windshield wiper failure: perform the following checks only when the front windshield wiper fails to operate. If the rear wipers fail to operate, proceed to section 2. * Check Fuse F44 (30 A) and replace as necessary. * Check connector X333 at the front wiper motor to makes sure it is plugged in correctly, and no corrosion exists at the connection. Repair as needed.