Sorry that I don't have a wiring diagram to reference. But assuming that in '94, HR was already using the "Front Run Bay" concept (exterior, driver's side) for power distribution, there should be a panel of fuses and relays there.
Generally speaking, pressing the brake pedal (and the 12VDC brake switch activated thereby) sends 12-volts to activate a relay.....and it is the relay that sends the needed 12VDC to the brake lights....not the brake-light switch itself. If this is true, then finding/testing the fuse and/or finding/testing the relay are ahead of you.
Robi & Dale ---- Go Navy ----
2016 Winnie TOUR 42'
Tow: '19 Buick Envision
or: '08 Buick Lucerne