Blinker not working

If all the turn signals stopped working and the other lights work then this is most likely a multifunction switch issue.

The way to confirm this is test the voltage coming out of the switch to the turn signals. I included the wiring diagram to do this. However, I also included the process on how to replace the switch as if it were me based on this information, I would replace this and then retest.

Here is a guide that will help do this testing:

https://www.2carpros.com/articles/how-to-check-wiring

Let us know what questions you have. Thanks