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TM 9-2320-364-20-4
2-3000
2. DIFFERENTIAL SIDE TO SIDE LOCKUP WILL NOT ENGAGE WITH CTIS IN
EMERGENCY WITH TRANSFER CASE IN LOW (CONT).
Dash lights operate indicating
circuit breaker CB8 OK.
Horn operates indicating circuit
breaker CB16 OK.
Air lines and fittings OK.
Differential lockup solenoid
valve OK.
Wire 1435 OK.
Differential lockup solenoid OK.
Wire 1882 OK.
Wire 1888 OK.
Wire 1885 OK.
CTIS controller OK.
Wire 1435 OK.
HI RANGE LOCKOUT relay
R23 OK.
Wire 1885 OK.
Wire 1890 OK.
DIFF LOCK relay R21 OK.
Wire 1093 OK.
Start switch S13 faulty.
Wire 1095 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If continuity cannot be
measured across start switch
S13, switch is faulty.
YES
NO
Replace switch
(Para 7-83).
Verify repair, go to
Step 16 of this Fault.
15.
Is continuity measured
across transfer case start
switch?
Repair wire 1095 (see
schematic Fig 2-72) or
notify DS
Maintenance.
Verify repair, go to
Step 16 of this Fault.
14.
Are 22 to 28 vdc measured on
wire 1093 at transfer case
start switch connector MC57,
terminal B?
YES
NO
Dash lights operate indicating
circuit breaker CB8 OK.
Horn operates indicating circuit
breaker CB16 OK.
Air lines and fittings OK.
Differential lockup solenoid
valve OK.
Wire 1435 OK.
Differential lockup solenoid OK.
Wire 1882 OK.
Wire 1888 OK.
Wire 1885 OK.
CTIS controller OK.
Wire 1435 OK.
HI RANGE LOCKOUT relay
R23 OK.
Wire 1885 OK.
Wire 1890 OK.
DIFF LOCK relay R21 OK.
Wire 1093 faulty.
Start switch S13 faulty.
Wire 1095 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If 22 to 28 vdc are not present
at start switch S13 connector
MC57, terminal B, wire 1093 is
faulty.
WARNING
WARNING
Repair wire 1093 (see
schematic Fig 2-72)
or notify DS
Maintenance.
Verify repair, go to
Step 16 of this Fault.
Read WARNING
on Page 2-3001
Read WARNING
on Page 2-3001
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