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TM 9-2320-364-20-4
2-3122
4. LOSS OF INTERFACE POWER 24 VDC.
INITIAL SETUP
1.
Repair wire 1784 (see
schematic Fig 2-76) or
notify DS
Maintenance. Verify
repair, go to Step 7 of
this Fault.
START
YES
NO
24 vdc present at polarity
protection terminal B.
Wire 1784 from 24 vdc polarity
protection to connector
MC136 terminal D faulty.
Wire 1784 from MC136 to
CB28 faulty.
Circuit breaker CB28 faulty.
Wire 1784 from CB28 to
MC136 faulty.
Wire 1784 from MC136 to
MC129 faulty.
Wire 1784 from MC136 to
MC130 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage Test.
STE/ICE-R #89
If wire 1784 from polarity
protection device to connector
MC136 is loose, faulty or
shorted, 22 to 28 vdc will not
be present at powerbox.
2-37. INTERFACE TROUBLESHOOTING (CONT)
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
STE/ICE-R (Optional)
(Item 3, Appendix G)
Multimeter (Item 44, Appendix G)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
Are 22 to 28 vdc measured at
connector MC136 terminal D?
WARNING
Read WARNING
on Page 2-3123
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