> How many light bulbs should be lit on the 91 Vanagon dash (with the lights on)?
> 
> I only have one on the front fan control knob, and a couple up over the gauge cluster.
> I suspect I need to replace some burnt out bulbs.

Love the title!

The dash pod should have left right and center bulbs. Your center bulb
is the most likely to be burned out, reason being that when a left or
right bulb goes when you're on the road the first thing most people do
is swap with the center bulb. :)