how to fix brake lights?

Note the diagram for stop lamps? See that fuse, check the fuse, that fuse is hot all the time, also check for voltage at the fuse, use a test light. see that red wire with yellow tracer going to stop lamp switch, that wire is hot all the time, check for voltage, use a test light. See the red wire with green tracer, goes hot when you step on the brake, check voltage on that wire. See the hi mount stop lamp and lower stop lamps in diagram, none of them work? The stop lamp switch should be activated by brake pedal arm, follow the arm up to find the switch. At the stop lamps in diagram, the top wire is voltage and bottom wire is ground, check both.