Help Needed 4x4 has no power to switch

[LAPLANT]

my 4x4 has not worked since i purchased the truck
I have checked all the fuses and relays and they are good
thought it was the GEM module so i replaced it with a new one from the dealership it made no difference
nothing at all happens when I turn the knob to any position no indicater lights come on or anything
hoping someone has some insight on this problem
thanks in advance for any help

 

[DaveBen]

Blown fuse, but I don't know which one is the four wheel drive.

Dave