if your right turn signal does not work then it could be the switch if not then it could be a wiring fault! Could also be turn signal flasher or switch in steering column as stated above
Turn signal flasher module?
you have a bad turn signal flasher.
Start by checking the fuses.
If your hazards still work, most likely your turn signal relay needs to be replaced.
cuz there broke.. try flasher or turn signal
For most vehicles the hazards and signals are two separate circuits, they have separate fuses and separate flashers. Check your signal light fuse and signal light flasher.
the left turn signal light on my ridgeline does not work but the right side works
i'd say its a bad relay switch.
Turn signal flasher
check for a bulb out.
Check your turn fuse. Or the connection between the flasher and the turn signal. Sorry I mean check the connection between the flasher and the turn signal switch.
It turns out the problem was that a couple of bulbs on the left side were burned out (front left turn signal, one of the rear turn signal/brake light bulbs.) After replacing the rear bulbs, the signal would work, albeit slowly. Once I pulled the front left turn bulb (with the intent of replacing it the next day), the turn signal light went steady-on regardless even without moving the signal indicator arm. That problem also went away when the remaining bad bulb was replaced.