4wd on jimmy

hello. hope i do this correctly, new here.
I have a 95 jimmy with 4x4 problems. started with only had 4 low and 2hi. took to dealer and they said encoder motor was bad. by the time i got it home the lights on pushbuttons only flashed. replaced motor. didnt fix it. replaced controle module and the push switch. still not working. any one have any ideas. im thinking wire problems. any body have any ideas where to get wire diagrams for this? any other switches, relays that i am missing? thanks for your time.
hope i did everything correctly and get some response. Thanks again in advance.

hello. hope i do this correctly, new here.
I have a 95 jimmy with 4x4 problems. started with only had 4 low and 2hi.
I am having the same problem with my 1995 jimmy...Used to be able to switch from 2wd to 4hi in any of the gears "PRND" Now the 4hi does not work only 2wd and 4Lo and it will only attempt to engage in nutrual While in any other gear even trying to switch to 4hi the buttons will not work :confused: ...I have read some of the other posts and have some ideas to check.....just wondering if you fixed your problem....Bob

vacuum module.

fixed my problem, traded for a durango. I found that the encoder motor was bad after taking to a second service shop and they found the first shop left in there code scan tool. thats why anything i did didnt help. always get second opinion.

very smart.