Do your brake lights and hazard lights work?
Do your reverse lights work?
Do your parking lights work?
Try turning the hazard lights on and off about 10 times and see if that makes any difference in the turn signal operation.
It's common for the connections in the hazard flasher switch to become corroded over time. Usually pushing the switch in and out several times quickly will restore the functions for a little while. Ultimately you will need to replace the switch if pushing it makes the lights work temporarily.
If you can find the little connector under the driver side of the dash that a scan tool plugs into then it is right above that behind the dash.
Before you just replace parts I am giving you the schematic so you can have someone test the system for you.
This should be all the info they need to properly diagnose your lights.