INSTRUMENTS
MOTOR TRUCK SERVICE MANUAL
If results are satisfactory, problem lies in sender unit.
NOTE: A standard test light may be used to check
If results are unsatisfactory, problem is with wiring or
wire continuity.
gauge.
7. Replace components where necessary.
5. Disconnect sender wire at sender terminal on gauge,
Fig. 27.
NOTE: When the key switch is turned off, the pointer
will not necessarily return to the lowest value. This is
6. Connect one lead of Fastestor to gauge sender
inherent in the instrument and does not indicate a
terminal and the other lead to a good ground.
faulty part.
Repeat steps 3 and 4. If results are satisfactory,
problem lies in wire to sender unit.
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