[gwhite13]

I am having trouble finding the root cause of my 4wd issue. I changed the dash switch, the exterior case motor (actuator), and still no fix. all dash lights blink and switch returns to 2whi or auto mode. does not engage 4wd hi or low. codes post to CO383 and CO323- locked circuit low ? I don't know what these mean. does anyone know where to point me? thanks for advice.