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TM 9-2320-364-20-2
2-1604
50. 12 AND 24 VOLT SYSTEMS NOT CHARGING OR UNDER CHARGING
(145 AMP) (CONT).
Both voltmeters indicate low
charge.
Batteries OK.
Fuel pump operates indicating
24 vdc present at DUVAC
controller IGN terminal.
Alternator belts OK.
DUVAC controller OK.
Wire 1278 between alternator
positive (+) terminal and
DUVAC terminal A faulty.
Wire 1275 from alternator
negative (–) terminal to
battery negative faulty.
Jumperwire from alternator field
coil negative terminal to
alternator negative (–)
terminal faulty.
Alternator faulty.
Wire 1344 between alternator
and regulator faulty.
Wire 1435 faulty between
DUVAC controller and ground.
Brown wire between DUVAC
controller and regulator
faulty.
Black wire between regulator
and ground faulty.
Wire 1274 between DUVAC
controller and batteries faulty.
Red wire between DUVAC
controller and regulator faulty.
Orange wire between DUVAC
controller and regulator faulty.
Regulator faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If at least 26 vdc are measured
at alternator positive terminal,
wire 1278 is faulty.
YES
NO
Go to Step 4 of this
Fault.
3.
Are at least 26 vdc measured
at positive (+) terminal of
alternator while charging in
the 24 vdc mode?
Repair wire 1278 (see
schematic Fig 2-39) or
notify DS
Maintenance. Verify
repair, go to Step 14 of
this Fault.
WARNING
Read WARNING
on Page 2-1605
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