i got the same problem but i got a message on evic about serv 4wd, abs and stability lights on. All fuses are good.Looks like M20 is the switch fuse, but that also supplies a bunch of other instrument cluster things. If the CCN does not receive messages from the switch it is going to set a DTC code, which should show up as a service required message in the EVIC.
I dunno but would suspect something internal to the switch. Otherwise it seems to be one of those go to the dealer to see if any codes are set things and go from there.