Need help !

There's also a turn signal relay. It possibly could be bad. I'd check the light bulb sockets for corrosion, if they are corroded or rusty you can take your battery cable brush and clean them out, spray some wd 40 or equivalent on the brush before you clean up the sockets. As stated earlier the contacts on the turn signal switch could not be making contact. I think from the things suggested to you that you'll find the problem. Good luck.