leathermang,
that's what i thought but i don't see one that would perform that function. where would it be. i found 5; 1) defroster 2) floor heater 3) center dash vents and 4&5) above the fan regulating the "source" air. there is a red and black vac line that goes over the heater box to the back side, can't find the end, maybe it goes to another vac motor. if it does, i'll have to pull everything apart to get to it!!!!!!
db