put it in neutral or park??

wont matter, either or..

ok i did it it turns in 2wl dr and it does not turn in 4wl dr

it turns in 2wl dr and not in 4wl dr

then something is wrong with the cad, or its not getting the vacuum signal, you said you tested the cad? how was that done, and you said you tested vacuum? where did you test?

i took the vacume shift motor out and shifted from 2 to 4 wheel dr and it moves back and forth. i put a vacume gadge on the two hoses by the transfer case. it read a little less than 20. one hose had vacume in 2wl dr and the other in 4whl dr

if i remember correctly, there are 3 lines to the cad (vent, 4wd eengauge, 4wd dissengauge) and the one to the driver side should be vent, the middle should be vacuum in 4wd, and the one on the passenger side should be vacuum in 2wd.

with that done you should be in 4wd, is it just the light not coming on?

ther is only 2 lines 2 my cad

is there any way to get them mixed up?