Ive done just about all I can to figure out whats going with my 02 f350 5.4L

I have no brake lights, Running brake lights, third brake light or signals front or rear, no hazards. Headlights work. I have quadruple checked the fuses. Wires on top of the steering column are good as far as I can see. Power to brake light switch. New multifunction switch (signal switch) and still nothing. Help is needed. Where are places I can look for some grounds if any one knows. Or if anyone has a wiring diagram of all the lights that would help.