Engine Preheat Switch

[mbulriss]

OK, I have one of those how-to questions that is not answered in 'the book'. On
my 91 on the far left topmost driver overhead dash panel, there is a black two
position toggle switch labeled "Engine Preheat" - that's it, no "on" or "off"
indication, no light. My question is: Is "on" when the switch is toggled in to
the left side or the right side of the switch? What kind of electrical draw
should I see on any of the gauges when it is on - *if* it is working?

Normally, we try to stay out of such climates where I would actually need said
switch, until this past weekend in the Texas hills where it got well below
freezing. ;^)

Thanks,

Mike Bulriss
1991 WB40 "Texas Minivan"
San Antonio, TX