Lights problem

[Blake_72_Blazer]

Here is the problem. I start the truck and turn on the lights and everything works, headlights, panels, brakes, and tail lights. Sometimes after a few minutes the dash panel, brake, tail, and sidemarking lights go out. The headlights, turn signals, and flashes still work. If I stop and turn off the truck for a few minutes, everything works again. Then after a minutes the lights go out again.

Any ideas?
Blake