4x4 woes

Figured it out............some clown had wired a cell phone from the past (mounted type) into the fuse panel #26, apparentally this fuse was loosing continuiety now and then(connector had corroded) and It controls both the 4x4 function and overdrive functions. My local ford dealer found the problem after spending 3 hours searching @ $52 / hour hunting for it, Still cheaper than a new truck, thanks for the info