Help Needed: Unlink A/C to Defroster

[stran]

Originally Posted by IllusionX

there IS a switch inside the knob that activates the compressor AND THE BUILT IN HEATER...

you do not really want to get beyond that that in messing around the wires...

Except the connection to the heater is probably via a mechanical linkage. I know that the vent knob operates via a mechanical linkage. With the car off and there's no power, you can still switch between the vents. On luxury cars I've driven before, the soft buttons activate a little motor that open and closes the damper that only works when the car is on.