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TM 9-2320-364-20-2
2-1636
52. 24 VOLT SYSTEM NOT CHARGING OR UNDER CHARGING (145 AMP) (CONT).
24 vdc voltmeter indicates low
charge.
12 vdc voltmeter indicates
proper charge.
Batteries OK.
Fuel pump operates indicating
24 vdc present at DUVAC
controller IGN terminal.
Windshield wipers operate
indicating wires 1281 and
1277 and magnetic switch
R26 are OK.
DUVAC controller OK.
Voltage regulator OK.
26-28 vdc measured at terminal
2 of DUVAC controller.
Wire 1702 faulty.
Wire 1435 faulty.
24 vdc voltmeter faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If 26-28 vdc are not measured on
24 vdc voltmeter, wire 1702
is faulty.
YES
NO
Repair wire 1702 (see
schematic Fig 2-39).
Verify repair, go to
Step 6 of this Fault.
3.
Are at 26-28 vdc measured at
wire 1702 at 24 vdc
voltmeter?
WARNING
24 vdc voltmeter indicates low
charge.
12 vdc voltmeter indicates
proper charge.
Batteries OK.
Fuel pump operates indicating
24 vdc present at DUVAC
controller IGN terminal.
Windshield wipers operate
indicating wires 1281 and
1277 and magnetic switch
R26 are OK.
DUVAC controller OK.
Voltage regulator OK.
26-28 vdc measured at terminal 2
of DUVAC controller.
Wire 1702 OK.
Wire 1435 faulty.
24 vdc voltmeter faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If voltmeter is not grounded
through wire 1435, voltmeter
will not operate.
YES
NO
Repair wire 1435 (see
schematic Fig 2-39).
Verify repair, go to
Step 6 of this Fault.
4.
Is continuity measured
between wire 1435 and a
known good ground?
Replace 24 vdc volt-
meter (Para 7-22).
Verify repair, go to
Step 6 of this Fault.
WARNING
Read WARNING
on Page 2-1637
Read WARNING
on Page 2-1637
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