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TM 9-2320-364-20-2
2-1608
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 OK.
Wire 1275 OK.
Jumperwire from alternator field
coil negative terminal to
alternator negative (–) terminal
faulty.
Alternator faulty.
Wire 1344 between alternator
and regulator faulty.
Brown wire between DUVAC
controller and regulator faulty.
Wire 1435 between DUVAC
controller and ground 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 5 vdc are not supplied
to the alternator field coil, the
alternator will not charge.
YES
NO
Go to Step 7 of this
Fault.
5.
Are at least 5 vdc measured
at alternator field coil positive
(+) terminal?
WARNING
Read WARNING
on Page 2-1609
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