Check the fuse, check the bulbs, check the flasher relay.
Most likely a bad turn signal flasher or blown fuse
It has two flasher relays. One for the Emergency Flashers and one for the Turn signals. Replace the Turn Signal Flasher Relay located front seating area, driver side, under dash, mounted in fuse panel as it is defective.
The emergency flashers and the signal lights are separate systems. Each has it's own fuse, switch and flasher relay. If your turn signals light up but don't blink I would blame the signal flasher relay.
replace turn signal flasher, hazard flasher is separate
Check for a bad socket Turn signal flasher? Switch at steering column?
One of four things can cause a turn signal not to work. Either the turn signal switch assembly, a bad bulb, a bad fuse, or a bad turn signal flasher.
check the bulbs, check the fuse then check the flasher, if they are still dead the signal switch may be at fault.
It could be a bad ground, also check the fuses its a 14A Fuse in the top of the block and all the lights (if one light is out that side wont work)
Replace the flasher relay.
check your flasher box, you should hear it click on and off when you turn them on, if not replace it. Check the fuses and flasher relays also.
Replace the Flasher Relay. Located Front seating area, driver side, behind left hand side of instrument panel, on fuse panel.