It is quite possibly just a weak connection in the dash wiring or the
cluster itself. A sudden electrical surge can trigger the blinker
circuit in the gauge. For example I have seen cases where each time the
radiator fan kicked on the coolant gauge led would flash a few times.
Also seen where turning on the headlights would cause a few blinks.
These were on pre-86 vans, diesel and gas. The later wiring setup is
more robust. None of these had anything to do with the coolant level
sensor system itself.

Mark

pickle vanagon wrote:
> We just took our first camping trip with the new engine.
>
> The only hiccup was that there were a few times when the coolant light
> flashed, each time just for 2-3 seconds.  Maybe 3-4 flashes of the light
> total each time, with a total of four occurrences out of 5-6 hours of
> driving.
>
> ..............