Re: Jump start issues
If the battery truly ran all the way down you already know what disconnecting it will do, the same thing.
If a jump only and nothing else done, likely the battery is still barely charged, Ford claims it can take 8 solid hours charging with the alt only to get it it back where it needs to be, and that is if the battery did not damage from the total rundown, some do to go bad.
FULLY charge and then loadtest the battery. Both the defroster grid and a/c clutch use whopping amounts of power; they both may not have quite enough to work right.