Problem with Brake Lights on 72 Blazer

[JDSurge]

I have a problem with the brake lights except, everything worked just fine a couple of days ago but now the brake, tail, and dash lights are out. I remember when I used to drive these old trucks and cars (1960's and 70's) that when the dash lights go out it means your brake and tail lights are out also because they were on the same fuse. My blinkers work just fine and the brake fuse is good.
Not sure where to start looking now. Thought sure I blew a fuse.
Any thoughts?
JDSurge