INSTRUMENTATION SERVICE MANUAL NUMBER 22
Page 4D-14 90-860074--1 FEBRUARY 2002
1. Connect an ohmmeter between sender terminal G and switch hex (case) for ground (–)
as shown.
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2. Using a suitable container, thermometer and heat source, suspend the sender with tip
in sand.
3. Heat sand and observe temperature on thermometer.
4. As temperature rises, ohmmeter readings must be within the ranges specified for each
temperature.
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a
b
c
d
e
a-Suitable Container
b-Thermometer
c-Heat Source
d-Water Temperature Sender
e-Ohmmeter Leads
Test Temperature Ohms Reading
60 Degrees C (140 Degrees F.) 121 - 147
90 Degrees C (194 Degrees F.) 47 - 55
100 Degrees C (212 Degrees F.) 36 - 41
NOTE: While sand cools you may recheck ohmmeter readings.
5. Turn heat source OFF. Allow sand and components to cool.
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