The contact owns a 2015 Ford F-150. The contact stated that while driving approximately 60-70 mph downhill, the vehicle failed to stop. The contact depressed the brake pedal but it became hard and failed to stop the vehicle. The contact was swerving in traffic and came to a sudden halt in a rock pit. The ABS warning indicator light was illuminated. While looking under the hood, he noticed that the supply booster spring clamp was not in the correct location. The contact stated that he sustained injuries to his neck but no medical attention was provided. The vehicle was towed out of the rock pit by a relative. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified. The failure mileage was approximately 2,280.