CGT h2o/fuel gauges too low, after voltage stabilizer

[Ti Kan]

Ken writes:
> On my '86 Coupe GT, the water temp and fuel gauges read too low.  I have replaced the voltage stabilizer/regulator with an untested new one sourced from a list vendor.  It did not fix the problem.
>
> What is the next level of troubleshooting I can perform to fix this?  Do the gauges themselves fail in some other way?
>
> I'm sure I'm supposed to test the new voltage regulator, which means I need to buy some test equipment.

The voltage stabilizer regulates the voltage to 10V, so you can simply
measure with a DC voltmeter if you have one.  These stabilizers rarely
fail by supplying low voltage, however.  They're usually working or
not working at all.  I suspect that your fuel gauge problem may be
a sender problem at the tank.  As to the coolant temp gauge, perhaps
it's also a sender problem, or perhaps you are running thermostat that
has too cold an opening temperature?

-Ti
01 S4 2.7 biturbo quattro
84 5000S 2.1 turbo
80 4000 2.0
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