So I got bored and wanted to disable the A/C from coming on when I selected the mixed(floor/windshield) and windshield only modes on the environmental selector. It kind of sucks to have the heat on in the middle of the winter only to have the A/C turn on and waste MPH.
So consider this is an Eco-Friendly mod!
After looking at the schematics I found that the green wire from the D3 connector triggered the A/C amplifier to engage the compressor. There is also a separate trigger wire for the manual A/C switch. Bonus!
Here is how it's done............................ :
I think it also stops the automatic "recirculate" from happening.