tachyon050

I have a 2005 F-150. The turn signal lights and the emergency flashers do not work. If I move the signal switch and it is dark outside or the brake lights are on, the signal will dim as long as the switch is in the right or left turn position, and the light will brighten as soon as it is moved to the center off position. If I activate the emergency flasher button, all the parking lights will go dim, and remain that way until I deactivate the button. I have changed the signal switch module, and checked the fuses, but they seem to be fine. (I was told to check fuses #2 and #13) Has anyone else had this particular problem? Thanks in advance for any suggestions.