Like bain said you need to get under there, and make sure your getting power/ground to the shift motor. Fuse 17 sounds right for the 4 wheel drive. Later ones used #104.Check both sides for power, and pull fuse. I like to check both sides of a questionable fuse with my volt ohm meter set on the beep function for continuity testing. If your volt meter doesn't have that, the regular ohm setting will work
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