Absolutely amazing the amount of thought and the quality of the write-up that went into this. Well done.
I have one comment and then one question:
Key On - HeadLights ON HighBeam - Parking Lights On - Fog Lamps On.
I believe this is illegal in many state. I think the Fog lights are supposed to toggle on and off with the high beams and the OEM Ford circuit is designed to do that.
(I know most police don't care about that and it is a popular mod to enable the fogs to work with the high beams on:)
How To: 2005 Foglight Mod
Modifying them to only work with the low-beams and not the high-beams would just require an additional relay - but probably not worth the effort.
Question: The 2012 and 2013 "S" never had an option for fog lights, but the 2012 SE had them standard. However, the 2013 SE does not have fog lights unless you add the $2530 SE appearance package. Does anyone know if the 2013 base model SE has the fog light wiring and the BCM set up and you just have to add the lights themselves, or is a mod similar to this required for it if you don't want to deal with replacing the BCM and re-flashing the as-built codes?