96 Sierra Electonic 4 Wheel Drive INOP

[geojr]

My 96 Sierra will not engage front axle. I have electronic 4 wheel drive. There is no power going to the front actuator and I can not find any wiring diagrams for electronic 4 wheel drive. Where does the power for the actuator come from?

[Jeremy-WI]

The front axle is powered by the 4x4 fuse through the tcase switch(on the top of the t case drivers side about directly above the front driveshaft-has a brown, lt blue and another wire to it, the brown should have power any time the key is on and the lt blue should have power any time the tcase is in a 4x4 mode)