Faking a/c to raise idle speed

[Dustytrix]

I have a 6.0 gen3 FI swap in 67c10. My air is vintage sure fit. All my air is controlled by vintage controls. My fans are controlled by engine temp/ecm. The engine wants to stumble at red lights or stopping when ac is being used. I talked to my tuner and he said ecm is tuned for ac idle adjustment. OK I want to send a signal to ecm to get it to raise idle when ac is on? I sent 12volts to red 17 and grounded red 55 but nothing changes. Does anyone have any ideas? What I can do to fake ecm inputs?