I went through the same hassle you are.  Wrote up my findings out on  my
website.  Have all of the bulbs and locations written there.  Hope it
helps you out.

See it at:
www.weidefamily.net/vanagon/
go to Electric >  Inside Lights
and click on either of the two articles:
Dash & Instrument Lights - Bulb and Socket Identification
Dash & Instrument Lights - Remove and Replace

thanks,
Brent