Please recheck the 20 Amp fuse marked "Stop" in the fuse box. Then check that you have 12 volts present at the green/black wire at the brake light switch. With the brake pedal pressed you should have power at the green /white wire at the switch.
Next there is a junction where the brake light switch wire sends power to the rear brake lights. With the brake pedal depressed there should be 12 volts at the green white wire at the connector found in the left rear panel somewhere between the fuel filler lid and rear left tail light, it is at this connector the power splits and feeds the tree rear brake lights.