Fuse, Thank you for the input. The bulbs look a little black but tested fine. Anyway I bought a new pair. Still no luck.

e3NiNe, I unplugged the switch and now I need your further help on how to complete the circuit. It has fours wires: w/b, w/yellow, green and gray. I thought the switch was fine since the high-mount brake light is good. Still I want to try the approach you suggested. Thank you for the help.