hetzi

I have a 2009 Mule and when I went to put the thing into 4 wheel drive or I thought I had it in and after that the power steering quit working. I have 3 wires to the electric power steering unit one ground and the other two power. Reading 4.25V at those two. Is that normal. Anyone have a flow chart for this diagnostic? I guess the speed sensor on the trans has something to do with the steering as well. Any ideas or help would be appreciated.