Went to pullapart this weekend. Bad news. No regulators
. However...
Oddest thing happened. Auto HI/LO are no longer working, the fresh air flap is not actuating but DEF actually pumps out some luke warm air. I am going to do some more debugging ASAP. Has to be vacuum issue of some kind. I couldnt find anything ovbious I hope its not in the friggin center console AGAIN.