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TM 9-2320-364-20-2
2-1602
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 faulty.
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 1274 between DUVAC
controller and batteries faulty.
Brown wire between DUVAC
controller and regulator faulty.
Wire 1435 between DUVAC
controller and ground faulty.
Black wire between regulator
and ground 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
Continuity test.
STE/ICE-R #91.
If continuity is measured, then
terminal A of DUVAC is shorted
to ground and batteries will not
charge.
YES
NO
Go to Step 3 of this
Fault.
2.
Is continuity measured
between terminal A of DUVAC
controller and a known good
ground?
Replace DUVAC
controller (Para 7-9).
Verify repair, go to
Step 14 of this Fault.
WARNING
Read WARNING
on Page 2-1603
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