TROUBLESHOOTING THE HMMWV - OD1616 - LESSON 1/TASK 2
Use the multimeter to make the following continuity checks from the
engine wiring harness connector at the protective control box to the
engine wiring harness at the glow plug controller.
o Terminal C at the protective control box connector to terminal 4
at the glow plug controller (lead 570A).
o Terminal B at the protective control box connector to terminal 3
at the glow plug controller (lead 459A).
o Terminal H at the protective control box connector to terminal 1
at the glow plug controller (lead 573A).
o Terminal A at the protective control box connector to terminal 6
at the glow plug controller (5642/5834).
If any of the leads do not have continuity, repair the engine wiring
harness following the procedures cited in paragraph 4-62, page 4-110
of the TM.
If the wiring harness is beyond repair, notify IDS/IGS
maintenance.
Step 2.
Start the engine and check for a 12-15 volts dc signal at
alternator lead 2A.
If no voltage is present or if the voltage is
not within the limits, replace the alternator following the
procedures in paragraph 4-2, page 4-2 of the TM. If 12-15 volts dc
is present, replace the protective control box following the
procedures in paragraph 4-5, page 4-12 of the TM.
5.
Conclusion
In this task, we covered the troubleshooting procedures used by unit
level maintenance personnel to troubleshoot malfunctions within the
HMMWV electrical systems.
In the next task, we will cover procedures used by maintenance
personnel while troubleshooting malfunctions occurring within the
various
systems
on
the
HMMWV
with
the
simplified
test
equipment/internal combustion engine (STE/ICE).
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