[Steeveedee]

The headlight switch feeds the tail lights in the back (as well as the headlights, ofc), it does not feed the brake lights. Power for the brake lights comes from the stoplight switch. That is the place to start. Check both side of the plug for power. If one side has power, push down on the brake pedal, and both should have power. If not, you have a bad switch. If no power at all, check the fuse on both sides for power. If it has power on both sides, trace the orange wire to see where it is open.