Anyone have any experience troubleshooting the coolant level warning light
circuit? My warning light won't go out, it blinks all the time now. The
coolant reservoir is full to the brim so that's not the problem.

When I measure the resistance of the coolant level sensor with an ohmmeter,
it initially reads around 200 KOhms but the reading rises until it's off the
scale of the meter (> 2 MOhm). This seems very weird to me but when I
measure a brand new sensor in a fresh 50/50 mix of Autobahn coolant it
behaves the same way.

The circuit diagram in Bentley is very strange as well. It shows a single
connection to the dash pod that services both the coolant level warning
light and the temp gauge. How can one signal control both functions? The
temp gauge is working just fine.

I suspect I might have a bad coolant level control circuit (the relay like
thing that plugs into the fuse block) but I'd like to verify that it's not a
bad connection before I get a new one.

Another weird thing is that the warning light flashes even when I remove the
control circuit.

Any insight into this problem would be appreciated.

-------------
Mark McCulley
87 syncro Westfalia (almost ready to hit the road)

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