four wheel drive does not work on 2000 Ford Excursion

Replaced transfer case motor still no 4 wheel drive

Asked by for the 2000 Ford Excursion
What is happening? You turn the switch to 4x4 and it's totally dead? Or it lights up and there is no engagement?
no lights ho engagement.....I know that points to the gem . i cannot find an exact replacement for the gem to even try. Are the gems truly generic? or are they built per car?
Have you checked fuse 17 & 104 in the Battery Junction Box? Fuse 6 in the Central Junction Box?

First place to look.