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FIGURE 4
When the coolant is hot, the low resistance in
the unit causes the instrument panel gauge to read
at the hot side of the dial with ignition switch on,
Figure 5.
FIGURE 5
VOLTAGE REGULATOR
The constant voltage regulator is common to
both the temperature and fuel systems, that is, one
regulator is used to operate both systems, Figure
6.
METHOD OF CHECKING
1. If both gauges read too high for example, if the
temperature gauge reads up scale with a co1d
engine, and the gas gauge reads up scale with an
empty gas tank, the constant voltage regulator is
COOLING SYSTEM 58
FIGURE 6
not working properly and should be replaced.
(Check ground connections of the voltage regula-
tor as grounding is essential to the proper function-
ing of the regulator).
2. If both gauges read too low, either the input
voltage to the C.V. regulator is below 5.0 volts
or the voltage regulator is inoperative and
should be replaced. Check battery voltage out-
put before replacing regulator.
NOTE: It is not advisable to attempt any re-
pairs or adjustments to either unit of the gauge
since they are factory calibrated and attempt to
repair is impractical.
FIGURE 7
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