1997 Jeep Wrangler wipers, windshield & visibility problems

Whike driving at 65MPH on interstate transfer case came apart and front driveshaft fell out. When this happened the airbags deployed,windshield wipers came on, washer squirted, dash lights came on. The passenger air bag busted the windshield, and the face of the passenger. Her jaw is broken in three places and her four upper teeth were removed from their sockets. She required extensive reconstructive surgery, and is still in the hospital. Noothers objects or vehicles were involved.

I'm the original owner and sole driver of a 1997 jeep wrangler with 34,000 miles. I noticed the windshield defroster wasn't working when I drove home in a snow storm last week. Fortunately, the drive was a short distance. I easily determined that a plastic bell crank broke off its shaft that goes into the heater housing. I activated the defroster control to confirm that this part is the defroster bell crank. Nothing has fallen down the defroster duct to jam the door and cause the break.