2007 Fccc B2 Visibility problems

Tl*the contact owns a 2007 freightliner b2 bus. The contact stated that the windshield wiper motor stopped functioning intermittently. He had to turn the vehicle off and within a few minutes he was able to restart it. The contact installed a new motor but the failure continued to occur. The vehicle was taken to an authorized dealer where the bulkhead module was replaced. The manufacturer had not been notified. The current mileage was approximately 42,000. The failure mileage was approximately 35,000.