If you do adjust the brakes, look closely at the wires going to the brakes.
Around 1995, we were en-route to Lake Chelan heading down a long grade with my "86 Terry Taurus in tow, when I noticed the brakes on our '86 Bronco were fading badly. I told this to SWMBO (She Who Must Be Obeyed) that our brakes were about gone and gave the the brake pedal one more push and was able to get her stopped.. County road with no shoulder and we waited literally over two hours for the wheels to cool to the touch. We weren't sure of the cause at that point.
Got to Chelan with the front rotors metal on metal and had the brakes replaced. We got the trailer back to our seasonal spot. A few days later, doing some routine fettling to the trailer, the son spotted the brake wires. They were poorly routed and rubbing against the propane pipe to the point of the insulation being gone and grounding against the pipe. If not for my then 13 year old son, I probably never would have spotted it.
2015 White Hawk 20MRB
2011 F150 Non EcoBoost (5.0)