Push and pull the hazard light button on column a few times, see if that changes anything.
Still no brake lights? Find the brake switch, check for power on the orange wire. If it has power, push the brake pedal, check for power on the WHITE wire. No power, replace the switch or make sure it’s adjusted correctly.
If you have power on the switch wire, find the turnsignal switch connector at the base of the steering column. Find the white wire in that connector, push the brake pedal and check for power on the white wire. No power? You have an open circuit somewhere between the brake switch and the turnsignal connector. Look for a stupid scotch lock connector for a brake controller, more than likely the scotch lock cut the wire.
If you have power on the white wire with the pedal pushed, find the yellow and green wires of the turn signal connector. While pushing the pedal, check for power on both of those wires. If not, replace the turn signal switch.