MS3PRO PNP A/C Idle Up Setup


New Member
Dec 4, 2016
Good Afternoon, I have a 03 Mach 1, my stock computer went out and I replaced it with a 99-04 Mustang MS3Pro PNP, my problem is the MS3 is not activating my AC, does anyone know what the idle-up input and output should be? Right now the are set to
Idle-Up Output: PWM Out 3
Idle-Up Input: Digital Switched in 3
Any help would be greatly appreciated, thanks in advance.
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That information is provided in the pin out available on the diy website. And likely in the usb stick you were provided with upon purchase.

Apost your tune and a datalog the car running while you cycle the ac switch.