1995 s10 4.3L - brake lights don't work. Any suggestions before taking to shop?

What is your question?

Other lights work at tail light assembly (hazard, park lights, turn signals). Brake switch is working. Relay is working. Tracing back from relay, no power on pin 30 (should always be hot?). Fuse panel slot 18 (brake) has no power coming in. Slot 1 (stop/haz) has power and good fuse.