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TM 9-2320-364-20-2
2-1616
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.
Jumperwire OK.
Alternator OK.
Wire 1344 OK.
Wire 1274 OK.
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
Voltage test.
STE/ICE-R #89.
If 22-28 vdc are not measured on
brown wire, then regulator is not
turned on and alternator will not
charge.
YES
NO
Repair brown wire
(see schematic Fig
2-39). Verify repair,
go to Step 14 of this
Fault.
9.
Are 22-28 vdc measured on
brown wire at connector
MC22?
WARNING
Read WARNING
on Page 2-1617
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