just one side or all, if all could be a flasher for the blinkers if just one side could be just the buld, try your hazard lights or emergercy lights, see if they blink. if they blink your flasher is good.
If none of the turn signals work it could be a fuse. Consult you owner’s manual. It will tell you where all the fuses are. If it’s only one it could be a bulb, socket, ground or etc. If you want us to check this out for you just call and schedule an appointment (313-562-7022). I am sure we can figure it out.