i have a 2001 ford ranger 3.0 and my 4x4 stopped working
, it used to work fine but now when i turn the shift on the fly knob nothing happens. i have checked all the fuses, in the cab and under the hood. neither of the 4x4 high and low lights come on and it doesnt engage. i was wondering if anyone had any ideas before i take it to get the computer checked?