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TM 9-2320-364-20-2
2-1720
3. TRANSFER CASE WILL NOT LOCKUP (CONT).
Air system pressure at
125 4 psi (862 28 kPa).
Parking brake light operates,
indicating circuit breaker CB8
is OK.
Wire 1435 OK.
Transfer case lockup solenoid
valve faulty.
Transfer case air chamber
line faulty.
Wire 1534 faulty.
Transfer case lockup switch
faulty.
Wire 1883 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Transfer case solenoid valve
test.
If transfer case locks up by
manually overriding the transfer
case lockup solenoid valve,
valve is faulty.
YES
NO
Go to Step 4
of this Fault.
3.
Does transfer case lock up by
turning the manual override
screw on transfer case
solenoid valve?
Replace transfer case
solenoid valve
(Para 12-40).
Verify repair, go to
Step 7 of this Fault.
2.
Is continuity measured on
wire 1435 between connector
M49 and a known good
ground?
Repair wire 1435 (see
schematic Fig 2-42) or
notify DS
Maintenance.
Verify repair, go to
Step 7 of this Fault.
YES
NO
Air system pressure at
125 4 psi (862 28 kPa).
Parking brake light operates,
indicating circuit breaker CB8
is OK.
Wire 1435 faulty.
Transfer case lockup solenoid
valve faulty.
Transfer case air chamber
line faulty.
Wire 1534 faulty.
Transfer case lockup switch
faulty.
Wire 1883 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
Wire 1435 is faulty if continuity
is not present.
WARNING
Read WARNING
on Page 2-1721
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