RE>>Coolant Temp Indications 11/14/95
>From: GDURSTEW@oimb.uoregon.edu hi Jim and Drew ! i don't doubt what you said Drew, but i've had the same gauge problem in my rabbit and i'm sure mine is completely electrical (i.e., NO overheating) because at the same time the temp gauge shows hot the fuel gauge goes up as well. never thought it serious enough to fix it, figured it's mebbe a loose ground connection in the instrument panel ???
============= When you mentioned a similar problem in your rabbit, the "memory light" went on. I seem to recall that VW uses a voltage regulator for the dashboard instruments to stabilize the voltage for the instrument cluster independent of battery voltage (within certain limitations). Check you Bentley circuit diagrams to be sure. Both the temp and fuel gauges are simple circuits that measure and display a current flow that is a function of supplied (regulated) voltage and a variable resistor (in the tank via a float, or via a temperature variable resistor (varistor) in the water jacket). The voltage regulator is the common item in both gauge circuits. Check it for intermittant operation or a bad connection. Harvey
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