Malcom, you should fix this or at least take steps to find out the true
cause. The 50/50 mixture issue is not a valid one IMHO. In any case,
since you have an 86+ model you can very easily pull the "43" relay from
main relay socket 3. That absolutely precludes ANY possibility of a
coolant mixture, coolant level, coolant level sensor, or sensor
connection as a cause of the LED blinking. If the blinking still occurs
with the "43" relay out, the problem simply MUST lie within the
instrument cluster or the wiring near it, such as the 14 pin connector,
assuming a blinking LED while the temp gauge reads normal.
Reseat the 14 pin connector and cross your fingers. If this does not do
it, the gauge itself is likely at fault and this is very common on the
tach equipped models while somewhat less so on clock models.

Mark

Malcolm Stebbins wrote:

>I'll be interested to see what the wise members of the list say on this one.  Often my van's 'red
>blinking light' does not go out at all (a bid differernt than your situation).  I check that the
>coolant reservior is full and that the belts are OK & no air in the rad.  The Temp guage dose NOT
>go above normal when this happens (same as your situation).
>
>What I know is that if the balance of coolant to water (50/50) muxture is off a bit, the sensor on
>top (in) the coolant reservior will send an 'empty' message to the dash, causing the red light to
>blink.  Also the 'blinking red light' control unit on the fuse box can give a false reading
>(that's in the archives).  My mechanic says: just drive and forget it.  That's tough, but in about
>a 1/2 hour the bllinking red light goes out.  This happens about twice a year.
>
>Also the vanagon gods love your wife, as she was smart enough to pull over, turn off the engine
>and call for help.  Good for her.  :-)    M
>
>--- Michael Elliott <j.michael.elliott@ADELPHIA.NET> wrote:
>
>
>
>>After about  5 minutes the red coolant warning lamp under the temp gauge started
>>flashing. The temp gauge was in the normal, midway location.
>>
>>
>
>
>
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>