[sanghill]

Turn signals are controlled by the Body Control Module which is under the dash forward of your left knee behind the cubby. There is not fuse in there or in the PDC that I can find in the Haynes Repair Manual. Turn signal front and rear and left and right don't work? Does the light on EVIC work?
Does the turn signal stalk seem to work ok? If you use the turn signal when making a turn does it automatically turn off like it is supposed to? Could be the turn signal stalk.
Could be the BCM or the clock spring in the steering column. Don't know what it is but it can fail.
Check in EVIC and see if you have any stored messages.
Check Related Threads below and see if you get lucky.

Start here: https://www.jeepcherokeeclub.com/threads/blinkers-not-working-2015-cherokee-limited.233377/

Do a Google search for "cherokee kl turn signals don't work". There are lots of Posts.

 

[sanghill]

EVIC is the dashboard display. Use the up and down buttons on the left of the steering wheel to view the various screens.
Use the left and right buttons to navigate within a screen.
Find "stored messages" and see if there is a message about the turn signals.