It sounds like a bad turnsignal switch to me, the way you describe it.
May have a bad flasher unit in the under dash fuse box, if all lights are working.
Could be a loose ground wire. Usually connected to a bolt on the frame near the rear axle.
Several possiblities that come mind. Turn signal switch, problem with a weak wire or connection that could be anywhere in circuit including between switch to fuse box to sockets, corrosion in sockets or a flasher or bulb. Sometimes bulbs filiments (the real fine wire you see in the bulb) can be weak braeak away temporarily but re-weld it self until it happens again.
replace flasher for for turn signals
Possibly a defective Flasher Relay. Replace it. Can also be a turn signal switch going bad. You can try cleaning it with a spray electronic cleaner.
Faulty light bulbs, damaged engine.
Bad turn signal flasher?
Yes it could.
Flasher is faulty.
Check the bulbs - they are doubloe filamented with the smaller being for brake/turn signals Check the fuses
On many cars one bulb on one side will cause both front and rear turn signals not to work so 1st check bulbs. Hope it fixes.
Check for a loose power steering belt.
Its either a faulty cable or a faulty electrical connection.
broken wire likely