NHTSA Complaint #11687190 — 2014 FORD F-150

My master cylinder leaked in to my brake booster, so I had to replace both after losing my brake stopping abilities. I received the new parts replaced them then hookup the battery checked brakes turned off ignition. Went back to start engine nothing battery 7.5 volts.. Replaced 250.00 started engine brakes good drove stopped 3 times got home evening sun down brake lights are on, I cant turn them off! unplugged battery. The brake switch was on and broken could not be reset. This is a fire hazard!!! My leads for the positive where hot very hot to the touch, my power was weak on the engine while driving I almost lost my truck over that Brake switch? No where does it say to replace it or why does this happen it clearly is a small broblem that can be a very big one fast!