GMC Repair: four wheel drive, s10 blazer, electric actuator

Question
i have a 94 s10 blazer with a 4.3 vortec my four wheel drive does not work i have a eletric transfer case and it lights up for the for wheel drive and you can hear the transfer case engage but the front tires do not get any traction

Answer
Hi
I found 2 schematics for 2 different 4WD systems.
If you have an electric actuator on the front axle, check the blue wire and make sure it is getting hot.
If so, you have a faulty Front axle actuator.
(Most common I'm familiar with)
The other one has a Transfer Case Control Module (TCCM) and it can display DTC's (Diagnostic Torouble Codes) by the "blink" method. To do this:
To cause the transfer case switch status lamps to flash and indicate the DTC's:
Install a jumper wire between DLC terminals J and A, or between J and a good ground .
Turn the ignition switch to the RUN position.
Wait approximately 3 seconds.
Observe the status lamps.
The transfer case status lamps flash to indicate the stored DTC's. If only one DTC is stored in the memory, that code flashes repeatedly with an approximately three-second delay between flash sequences. If more than one DTC is stored, the first DTC flashes once, then an approximately 3-second delay occurs, then the next code is flashed. Such sequences continue until the jumper wire is disconnected.
If you do this and get codes post back and I'll give you diagnostics.
Hope this helps.
Just advice from experience.
Good Luck
Pawl