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TM 9-2320-364-20-2
2-1610
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.
At least 5 vdc are supplied to
alternator field coil indicating
regulator and related wiring OK.
Jumperwire from alternator field
coil negative (–) terminal to
alternator negative (–)
terminal faulty.
Alternator faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If alternator field coil is not
grounded through jumperwire,
alternator will not charge.
YES
NO
Repair jumperwire
(see schematic Fig
2-39). Verify repair,
go to Step 14 of this
Fault.
6.
Is continuity measured
between jumperwire and a
known good ground?
Replace alternator,
(Para 7-2). Verify
repair, go to Step 14 of
this Fault.
WARNING
Read WARNING
on Page 2-1611
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