I can't find a wiring diagram that matches my van....not sure if my
other post was read but I put some pictures of the fuses box and engine
here: http://www.onwatersports.com/Westy/

I got some great documentation from vanagonparts.com

I have two wiring diagrams although they don't seem to match what I see.

Does anyone have one they  can scan or can someone possibly take an image
and send it to me?

Even the auto electician is stumped!

I'm going to look on  the left side of the steering column for a relay,
and above the fuse panel for another fuse.

Evidently this old model doesn't have the low pressure shutoff switch, and
the pressure seems to be fine. Compressor works when hot-wired.

Thanks,

Andree