I repaired a 91 awd for binding, had a code for duty c sol, sol ohmed ok installed fuse no fix, checked pinouts at trans ecu no power to sol, replaced trans comp, all good. side note, this car was bought used and the prev owner had driven or towed this car in that condtion for so long that the rear diff had exploded and cought fire, scorch marks on the rear bumper should have been a clue. I reaplaced rear diff, mounting bushings, and fuel lines, car runs/drives awesome