Okay here is my issue :
I have explorer 98 v6 4.0L 4wd
I changed my transfer case with the shift motor because the old one was making noise and grind

I put a good used and tested transfer case but once i started the car to test it I noticed its feels loke stuck in 4 low.
I parked the car and switched it to 4wd Hi. The light of 4wd hi came ON in the dash. Then I put the shifter in Neutral and moved the switched to 4wd low but the light of 4wd hi stayed ON never seen the 4 low light in the dash. I'm so confused and disappointed now. Even with the old bad transfer case it was fine other than the noise the transfer case making. Is there any body familiar with this problem? I have seen some threads about similar issue but none of them was helpfull
Please heeeelp

 

pull the shift motor off and set on the floor under truck. Plug in the electric cable. work the dash **** and see if the motor moves and strokes. You either have a bad elect plug bad motor, or stuck inside case lever.