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TM 9-2320-364-20-4
2-2986
2. DIFFERENTIAL SIDE TO SIDE LOCKUP WILL NOT ENGAGE WITH CTIS IN
EMERGENCY WITH TRANSFER CASE IN LOW (CONT).
4.
Is continuity measured on
wire 1435 between differential
lockup solenoid connector,
terminal 2 and a known good
ground?
Repair wire 1435 (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 faulty.
Differential lockup solenoid
faulty.
Wire 1882 faulty.
Wire 1888 faulty.
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 wire 1435 at differential
solenoid, terminal 2 does not
provide a good ground, solenoid
will not operate.
WARNING
Replace differential
lockup solenoid valve
M51 (Para 12-40).
Verify repair, go to
Step 16 of this Fault.
Read WARNING
on Page 2-2987
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