Originally Posted by Jeffrey
How are your brakes working? When the vacuum pump craps out, you'll lose power assist on the brakes, and the dash vents stop working....
Had this issue on my 7.3L Excursion. Brakes were OK but pulsed, and then the cabin vents all defaulted to the defroster vents. Replaced the (electric) vacuum pump, and the vents returned to normal, and the pulsing brakes went away.
BTW, mine happened while on vacation too. During the Summer. During a hot Summer. Fortunately the rear AC system (Excursions have two) worked as it should and I directed some of the vents forward.