Do you mean the turn signal lights/blinkers?
Check the turn signal flasher mounted on the fuse box in the lower left-hand side of the dash below the steering wheel. While you're at it, check the fuse for the turn signals and replace if necessary (use the fuse guide on the back of the fuse box cover to locate the turn signal fuse). If neither of those work, check the wiring or have someone else do it for you.
It could be a blown fuse. Tail lights and brake/turn are on separate fuses. Apparently there is not a ground problem since brake/turn works OK.
The problem points to the directional/lights and hazard switch. The brake light wiring is part of that circuit.You can buy the switch after market it is about $70.00.
Check the brake switch at the pedal.
If you have a plug for trailer lghts it is probably a short circuit in the socket.
Have you checked the bulbs themselves? The directional signal should be the same element as the brake light. Check to see if you rear directional signals.
check the fuse, brake lights have their own, & check the brake switch at the top of the brake pedal
The brake relay switch is bad.
Probably a blown fuse.
Fuse for parking lights probably blown.
Check the brake light fuse. If you have 12 volts at the brake light switch I would suspect the signal light switch is at fault.
Replace turn signal switch. Its grounding when you put turn signals on. I had the same problem and replaced it .Solved issues.
Is it the taillights or the brake lights? If taillights it may be a wiring problem, If brake lights check the switch on the brake pedal