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TM 9-2320-364-20-4
2-2990
2. DIFFERENTIAL SIDE TO SIDE LOCKUP WILL NOT ENGAGE WITH CTIS IN
EMERGENCY WITH TRANSFER CASE IN LOW (CONT).
7.
Repair wire 1885
(see schematic
Fig 2-72) or notify DS
Maintenance.
Verify repair, go to
Step 16 of this Fault.
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 faulty.
CTIS controller faulty.
Wire 1435 faulty.
HI RANGE LOCKOUT relay
R23 faulty.
Wire 1885 faulty.
Wire 1890 faulty.
DIFF LOCK relay R21 faulty.
Wire 1093 faulty.
Start switch S13 faulty.
Wire 1095 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If continuity is not measured on
HI RANGE LOCKOUT relay
R23, wire 1885 between relay
R23 and CTIS controller is
faulty.
WARNING
Is
continuity
measured on
wire 1885 between HI RANGE
LOCKOUT relay R23, terminal
30 and CTIS controller
harness connector MC105,
terminal 4?
Read WARNING
on Page 2-2991
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