I'm in the process of doing a Coyote swap using a stock 2012 F150 5.0L PCM/reworking the stock harness, and noticed in the tune that it has a drop-down box for a manual A/C input.
We had this same box on the GM LS computers, and it enabled a pin on the ECU to allow a hard 12V input to the PCM so that it would change the idle parameters and activate the electric fans.
IF that's what this is, can ANYONE please point me to the proper pin on the ECU so that I can add it into my wiring schematic, that would be stellar!
I see the pressure switch PID is enabled, but the other one is not.
Thanks in advance!