I have no breaklights no hazard lights on a ford f150 20000 , checked all fueses but haven't seen one that say whst it opporates
Your lower brake lites are wired through the multifunction switch, so is hazard lamps. Does the high mount brake lamp work? Check the fuse in diagram that says hot all the time, not only check the fuse, use a test light and check voltage on the fuse circuit. I'd have to check voltage to and from multifunction switch.
Also check for a ground at all affected lights. Trucks are known to ground issues. It's easy enough to check for ground.
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