They probably share a common fuse in the front fuseblock for ignition.

Ignition is fed through the fan switch, either to the A/C fans directly,
or to the 3rd/4th speed relay inthe left D-pillar cover.
Same for the power windows.

Rear of fuseblock, Pins "G".
I think G3 and G5 (here´s your grain of salt)

Regards
Raimund

Am 27.07.2020 um 05:00 schrieb VW Vanagon:
> Had a first today on the maiden voyage of our '88 Westy.
> Background: Just bought this Van, and it landed today.
> PO had the AC serviced last week, and it blew ice cold with no issues.
>
> We were driving with the AC set to 4 (full cold), but it wasn't blowing
> cold.
> Pulled off to look closer at it, and the AC suddenly stopped blowing
> altogether.
> The power windows also stopped working simlutaneously.
>
> But why?
> The AC and windows aren't on the same circuit, but for them to BOTH go out
> at exactly the same moment . . . ?
>
> Anyone experienced this before?
>
> Matt
> Missoula, MT