Regarding my coolant level LED coming on after installing the vanagon.org
dash foil replacement kit: OK, some progress in the past few days. This has
been a tough one but I have had David B's help to bring me along.

In the midst of all this swapping, removal, cleaning, tweaking and testing,
I discovered that the integrity of my new dash foil, instruments and
voltage is very much in spec. What I was not ready for is the fact that,
since it is 95 degrees inside my van right now at best during mid-day, of
course I was running a dash fan, flipping it on as soon as I left my
driveway. That dash fan is not fluctuating the voltage, so it is not the
fault of the dash foil replacement regulator, but rather the RF from the
fan. Flip the fan on, the coolant light comes on. Flip the fan off, the
coolant light goes out. So, the foil may--or may not--be overly sensitive
to RF. In any  event, I tried several other items lying around to put a
load on the cig lighter wiring just to see what happened.

iPhone charging = nothing
300/600 watt inverter -= nothing
300/600 watt inverter with 110 v room fan plugged in = nothing.

I have ordered an identical replacement fan through NAPA that will be here
this afternoon. It may end up that I cannot use an AC fan with this dash
foil replacement kit, but it may be likely that I can move the 12v source
from the fuse block to another source. My rear outlet comes directly off
the car's battery, and the offending fan plugged in there does not trigger
the coolant level light.

It should be said that though it seems I have finally identified the
problem, and that without the problem load, the circuitry acts normal, I
have not driven extensively enough to prove it will never happen under any
other circumstances. The problem does not occur when I run the wiper motor.

Jim