s10 4x4 help please

I need help. I canât seem to get the front wheels to engage in my 92 s-10. Here are some of the things iâve checked. Vacum: checked the hoses, in fact I have vacum to the acuator(sp) when I start the truck even if the shifter is in 2 wheel, donât know if this is normal, but the acuator works it is pulling the cable. I even unscrewed it from the case and made sure it was hooked inside.

Mechanical: when i shift into 4 wheel the front shaft locks and spins when driving. When i shift into 4wheel low I get the normal little grind and the rear wheels lock together but still no front.

Electrical: The lights on the console donât come on no matter where the shifter is. not even the one that tells you that itâs in 2wheel.

One of the things that I did do was jacked the pbuttenger wheel of the ground spun it and then put the truck into 4wheel. A friend told me that the wheel should lock when you do this and it donât. So what else? diff broke? I hope you guys can come up with something else besides that. thanks Mike

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