Intermit message "Trailer disconnect " message causing the trailer braking system to fail when attached to truck. Truck brakes are used to stop trailer at unsafe distances. Several trailers were used to verify. I have attached the fix but Toyota says its warranty issue. This is a "safety" issue. I had my 3 year old son in the truck when i had to apply the brakes and couldn't stop in enough time. The truck brakes could not handle the weight of the trailer hence why the trailer brakes were needed. Please prevent a death.