TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
7.
HOURMETER DOES NOT OPERATE (MODEL A ONLY) (continued).
2.
TEST OPTIONS
KNOWN INFO
Voltage OK at junction
Continuity Test.
Is there continuity
box terminal strip.
measured in the
REASON FOR QUESTION
hourmeter wire
POSSIBLE PROBLEMS
If the hourmeter wire
harness?
harness is OK, the integ-
Hourmeter faulty.
rity of the complete
Hourmeter wire harness
electrical circuit has been
faulty.
checked. The hourmeter
must be defective.
Replace hourmeter
wire harness (para
NO
Replace hourmeter
YES
4-122
Change 1
