Can someone explain what settings specifically command the A/C clutch on the green wire? I can't find any combination that does,but the controls are quite confusing by label alone. My fan speed switch seems to function properly with the exception of the highest speed setting being intermittent. The mode doors seems to function, changing the vents. But having a test light plugged into the green wire and grounded, I cant even get a flash with the key in the on position. There isn't something in the system that requires the engine running is there? The car is LS swapped with a Sanden pump and a Vintage air condenser, 134a retroed and factory POA system. Was there a daisy chain through a pressure switch im missing? I currently have a trinary switch I'm wiring in and this is how I discovered the issue.