I have a problem

I was in a wreck that made both airbags go off, and now I cannot shift into 4x4. I turn the switch to 4hi, and there is no light on the dash, and it does not go in. I turn to 4lo and the low range light comes on and it goes into low range, but the front wheels will not turn. I did not do any driveline damage that I know of, yet I cannot engage 4hi.

I checked all the related fuses and they are fine. Where could I look to find anything that may be broken?