Try checking the Fuse #7 (7.5A), Fuse #8 (20A) and the Fuse #16 (7.5A) for the Left Rear Window, the Front Passenger's Window Motor and the Right Rear Window respectively in the Passenger's Under-Dash Fuse/Relay Box.
The rear vent motors have been known to fail to operate over time.
since it happened at the same time I would guess the circuits first. Are these located on the door switch panel? What might one have to do to fix?
Thanks for the work you have done in all your postings.