Don't lift

All brake lights out, check #19 fuse, looked OK.... still replaced it, no help.
Wondering is there a relay to check before diving into the brake light switch?
Also, any way to test the switch out or just replace it and hope that is it? Am I in the right direction? Any word of advise is appreciated.
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'97 Blk/Blk C2S

Sooner

This happened to me about a month ago. Check the switch under the brake pedal in the pedal cluster. Mine had come loose. I tighented it back up & everything works fine.

5 minute job (I did it in a parking lot one night).

Don't lift

Thanks Brian, I'll check it out.
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'97 Blk/Blk C2S