97 Silverado 4 wheel drive problem

[chevyskier]

My four wheel drive is not working, and I am not sure where to begin testing it. I think it may be and electrical issue. Is there any switches that I can check to try and stage the checks?

[Jeremy-WI]

Do you have push button? Do the lights light up when you turn the key on? What does it do when you try to go to 4HI?

[chevyskier]

it is shift on the fly. When you place it in Four wheel drive nothing happens, no lights, and it doesn't engage.

[ZIPPER8897]

im haveing the problem, does your truck shift on the floor or by push button. mines on the floor so i now everything up to the front axle is working, there is a sencer in the axle the turns on you automatic hubs so that could be problem to