I have a 2015 JKUR. I swapped in 2018 Recon axles and put a lift kit on it and haven't driven it much. I am trying to get everything going again and noticed the locker switch doesn't seem to do anything. I don't hear any clicking and nothing on the dash at all. I replaced the transfer case swith and that didn't help. I replaced the TIPM and no luck. Fuse 22 is good. When I shift to low range the ESC OFF light comes on and I can disconnect the sway bar. I don't know what else to check.

 

if it were me, i'd run 12v directly to the locker and just verify it's working. If does, time start troubleshooting jeep electric side. if it doesn't, time to open the cover and inspect the locker.