Now hold on a minute. You have multiple circuits that are not working, that are fed from multiple places. What they all do have in common, it appears, is the grounds. Does your center high-mount brake light work? That is the only one that has a ground that is not shown on my diagram. The rest all appear to be grounded at the "left rear of the vehicle".
Check for voltage on the light green / orange wire at the left rear brake light bulb, and / or the orange / light blue at the right side, with the brakes applied by a helper. (I use a stick between the seat and the brake pedal to gold the pedal down). If you have voltage to those places, it is the ground wire you have to follow. Ford likes to bolt a number of ground wires to the same stud, so if that terminal corrodes off, you will have a number of dead circuits.
Monday, May 16th, 2016 AT 8:01 PM