***EDIT**** SOLVED, SEE NEW POST AT BOTTOM..... Hello all. I am looking to get this problem fixed as with winter here I need to be able to get my truck into 4x4 whenever needed. Currently if I am stopped or driving slow turning the knob to 4x4 I can hear the relay clicking under the passenger side dash but it will not go into 4x4 However if I am driving over 30 mph or so it will go right into 4x4 and the dash light will stay lit. I currently have the ABS light lit up n the dash but my scanner will not give me any codes. I do have issues with the rear tires locking up so I am thinking that I may have a rear ABS sensor problem. My speedo shows correct and my transmission shift correctly. What should I do to fix this?