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TM 9-2320-364-20-2
2-1662
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If 22 to 28 vdc is not present,
oil pressure switch is faulty.
YES
NO
Replace oil
pressure switch
(Para 7-60).
Verify repair, go to
Step 9 of this Fault.
8.
Are 22 to 28 vdc measured on
wire 1020B at oil pressure
switch when engine is
running?
WARNING
Read WARNING
on Page 2-1663
54. 12 AND 24 VOLT SYSTEMS NOT CHARGING OR UNDER CHARGING
(200 AMP) (CONT).
Repair wire 1020B
(see schematic Fig
2-40). Verify repair,
go to Step 9 of this
Fault.
Both voltmeters indicate low
charge.
Batteries OK.
Fuel pump operates indicating
24 vdc present at CB24.
Alternator belts OK.
Fusible link loop OK.
Wire 1275 OK.
Alternator OK.
Voltage regulator OK.
Wire 1020A OK.
Oil pressure switch faulty.
Wire 1020B faulty.
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