front drive shaft

hello there all
I noticed somthing tonite with my 90 laredo.the 4wd lever is up all the way in the 2wd postion no lights on in dash(full time,part time light)I am not able to turn front drive shaft with my hands.should it turn free?Is it out of adjustment?thanks in advance wayne

In my 93 the front drive shaft is always connected to both front wheels and if they are on the ground, then turning the shaft by hand would try to turn the wheels. I have read of early models that disconnected the right front wheel from the front differencial with a vacuum controlled system. If you have two vacuum hoses to the middle and right end of the right front axel, then the vacuum should disconnect the right front wheel.

No hoses then your fine.

With hoses and it won't turn, you might have a vacuum leak or bad vacuum valve in the transfer case.

Enjoy