What component or system failed or malfunctioned, and is it available for inspection upon request? While parked, the rear defrost button was engaged. Shortly afterwards (1-2min) the backseat filled with smoke. I had my family immediately exit the vehicle and the rear window exploded. I checked the area and found an electrical wire draped over the rear passenger seat. It was melted and had clearly exploded up and over the seat. How was your safety or the safety of others put at risk? Yes, had my children remained in the vehicle, they would have been sprayed with glass or burned from the electrical short. Has the problem been reproduced or confirmed by a dealer or independent service center? No, however, I looked online and found this has happened to others. I called Ford service center and they informed me their were no recalls out on the truck. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No. However, Glass doctor performed the repair since Ford outsources their glass repair work Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No