So its been awhile I haven't need the 4wd so it never got fixed...till now im snowed in and decided to try again I took the add box off and bench tested it, gave it power and it moves just fine back and forth changed the front diff fluids put it all back together nothing happens when I put it in 4wd drive my diff. Lock light is on solid the 4hi light is flashing and vsc is on solid. I unplugged the transfer case black box wiring harness checked not corroded up loosened the three bolts holding the box holding the box to the tc and wiggled it around put it all back together still nothing. Had to go out a bit so I left the selector in 4hi just in cas it changed its mind and wanted to work and noticed my mirror direction thing keeps reseting its self and the lights on the dash will flikker it dosent do that when selected to 2hi. Any help or suggestions