Hi Benny, do you have a user manual for it as well? Curious whether it has a user controlled mode similar to the Redarc or if it's purely proportional.
I tried this at the dealer today. I was able to activate the rear locker in 4-Hi, in a 2021 Mojave, manufactured Sep 2020.
The procedure is shift transfer case to 4-Hi, press Off Road+ button, hold ESC Off button for 5 sec (it seems pressing it once disables traction control, holding it for 5...