Hi Leo,

Mine in my 82 Westy diesel works as an extra
indication of excessive temperature.  I tested it by
substituting resistors for the sender, simulating
different temperatures.  It blinked with high
temperature, so I'm pretty sure mine doesn't indicate
coolant level.  Problem with mine is it sometimes
blinks for awhile for no known reason.  Then stops,
then blinks, then...  It does get your attention
though.

Rob

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