Probably a bad flasher
My guess would be the turn signal switch lever itself is defective.
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.
possible bad turn signal switch in the steering column or a bad ground on your turn signals.
1995 hond accord in cold weather turn signal does not work?
Check the 2005 GMC Envoys turn signal flasher. The flasher could have an intermittent issue causing the signals to not work.
Replace the rear bulb and be sure the contacts are clean.
I have a 2000 olds alero and the signal light only work sometimes, What would cause that?
The turn signal flasher relay is defective, replace it.
replace the turn signal flasher fuse.
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
usually a fast turn signal flasher indicates that a bulb is burned out. my bulbs are lit up ok my bulbs are working but sometimes it get this lil buzz and neither of the lights will work
Parking Lamps versus Turn Signal Lamps Whether the turn signal will work when the parking lamp does not DEPENDS on they way they are wired, and this varies depending on vehicle make, model, and the way the circuit(s) are wired. On some vehicles, the parking lamp is the same as the tail lamp, and and the turn signal, and they all "share" the same filament, and if that filament is burned out then the turn signal will not work. If these functions are served by separate filaments, then when one is out the others will work. Therefore, the answer to your question depends on the your vehicle and the way it is wired.