1999 Ford Expedition 4x4 light flashes when NOT engaged

Well, I hope neither of us paid that guy too much! Actually, I should have clarified that we only got this Ford last fall, with 109k miles on it. We do think the brain is having “senior issues” since sometimes the odometer goes out, then comes back on, the ABS light comes on and goes out. Oh, sometimes the dash looks like a Christmas tree! We don’t have a wiring schematic. Just mostly concerned about if there’s something wrong w/ 4 wheel drive system that I really don’t want to destroy. Maybe replace the entire dash! I can’t complain w/ the way it’s running, but don’t have any background to compare to. Thanks for your thoughts.
nodakone