I searched but all the threads that I found about the 4wd not working said the light didn't turn on either.
I had the transmission replaced a few weeks ago and the 4wd worked prior to that. Now of course we are getting a blizzard and the 4wd isn't working. The 4wd light comes on when I hit the button and I hear a relay click but that's about it. The front wheels don't spin at all. I tried putting it in 4-low and not much is happening up front at all.
There wasn't much I was able to check because there is a few inches of snow and I don't have a garage to work in. The truck is pretty much stock.