[MT-2500]

Which transfer case? 233 or 236? 3 buttons on dash or more?
To clear codes or reset try removing the fuse no 15.
But first you need to pull codes.
A 236 a good eng/trans capable scanner will pull codes.
On a 233 ground pin 13 to retrieve codes.
Does your indicater light come on for a bulb check when you first turn on key?
If not check fuses.
Post back code no.
And engine sise and mileage and transfer case type.
MT