Brake lights not working

[02rameddy]

Ok so I have a 2002 dodge ram and my brake lights are not working. When I turn on the headlight the rear lights all turn on and even my signals work but when I brake the light does not get brighter. I replaced the fuse and the brake light switch and even my third brake light works. I also turned on the flashers and the actual brake lights get brighter so I know the dual filament is working properly so if anyone could please help me out on this problem? Thanks

 

[NYCruiser]

You're gonna have to get a meter or test light and start tracing. I'd start at the wiring to and from the brake switch. See if you have voltage to the switch and go from there. Shouldn't be to hard.