Hello Steve I crimped the single inlet hose to the control valve. I drove for a mile or so the heat still comes from passenger and driver side vents ..the center vent have ice cold air..I guess my question is how can the heat be on with the hose crimped does this not stop circulation through heater matrix? I haven't checked voltage or ground yet. I'll do that tomorrow when I can borrow a volt meter. Is there one blend door that shuts off the heater air flow and accesses the evaporator air flow? I'm reminded of a vw plenum and the vac pod was not changing over? thanks again for your patience.