Missing 4WD in '95 K1500 Suburban

[Jefrey]

Dear forum members,

 

This is my first post and I'm glad to be here. I will try to be a kind user

 

I look for some help in diagnosing missing 4WD drive in my '95 K1500 Suburban LT which I have bought some weeks ago. This is a very uncommon car in my country so I have decided to ask for help here amongst such experienced Chevy users.

 

So basically how it looks now:

1. Faulty 4WD fuse (no.24, 25A) was replaced.
2. If the floor lever switched in 4H position then the transfer case engage power to the front differential properly.
3. But there is no voltage applied to the front diff actuator.

I don't know if the front actuator was faulty because the voltage is missing somewhere before it. In the meantime I have replaced and upgraded the front diff actuator from thermal to electric (still no 12V going to it), I have also replaced the transfer case switch. This was of course totally useless because there is also no power going to it

 

The real problem I think is that I have misured that there is no power at all going to fuse no.24 and imho this could be the clue

I know that I can always add a separate wire and a switch directly to the actuator as suggested by some user but I will try first all possibilities to maintain the harness in original state. Hopefully we have a very light winter so far.

 

I will be grateful for some tips about what to check now. Regards.

[O_J_Simpson]

Replace the old thermo actuator with a mechanical on.

[Jefrey]

Replace the old thermo actuator with a mechanical on.

 

Already done. But this is meaningless as I have no voltage on actuator, no voltage on t-case switch and no voltage on fuse no. 24

[grampadirt]

Power for that fuse comes from the ignition switch and is orange(according to Mitchell wiring diagram).It might be a PITA but if it were me I'd find that orange wire behind the fuse block and follow it to the ignition switch,it might be cut or damaged somehow.