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TM 9-2320-364-20-2
2-1138
1. ALL 12 AND 24 VDC CIRCUITS DO NOT OPERATE (CONT).
Batteries OK.
Isolator OK.
Wires 1431 between
battery No. 1 and isolator OK.
Wire 1431 between isolator and
ENGINE switch OK.
Engine switch faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
YES
NO
Replace ENGINE
switch (Para 7-32).
Verify repair, go to
Step 6 of this Fault.
5.
Are 22 to 28 vdc measured on
wires 1020 and 1640 at
ENGINE switch?
Fault not corrected.
Notify DS
Maintenance.
If 22 to 28 vdc are not measured
from ENGINE switch, 24 vdc
circuits will not operate when
ENGINE switch is turned to ON.
Batteries OK.
Isolator OK.
Wires 1431 between
battery No. 1 and isolator OK.
Wire between isolator and
ENGINE switch OK.
ENGINE switch OK.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Verify repair.
YES
NO
Fault not corrected.
Notify DS
Maintenance.
6.
Do 12 and 24 vdc circuits
operate?
Fault corrected.
If 12 and 24 vdc circuits
operate, fault corrected.
WARNING
Read WARNING
on Page 2-1139
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