No running lights?

[ben99]

So the running lights have quit working on my truck and I cant figure out why. The flashers still work, and so do the headlights but no brake lights blinkers or running lights... All the fuses are good, and so is the switch. Anybody got any ideas on what to look for next? I would think if a wire was ground out they would flicker, or only some of them wouldn't be on?