4x4 issue
 

Well I am stumped, yesterday I was out with some friends playing in the dirt, clicked the 4x4 auto button and it lit up just fine. Went over one little mound, nothing too bad, and then within a couple minutes after all 3 lights on the switch went out and havent come back on since, not even a flicker.
The 4x4 turned off so I have been able to drive the truck. I checked the fuse and the grey box under the kick panel. Fuse is good and no corrosion that I can see. I am stumped, can anyone weigh in on this matter?