Have you checked all of the bulbs to be sure lights work? Had a switch I couldn't figure out for the longest time so finally called the dealer. Turns out it was a "dump station" light, but it didn't/doesn't work which is why I couldn't figure it out.
Rob & Kelly, Bella & Brady (Miniature Schnauzers)
2016 Eagle 323LKTS
2016 Ram 2500 6.7L CTD
2015 White Hawk 29REKS Summit Edition (Traded)