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TM 9-2320-364-20-4
2-2982
2. DIFFERENTIAL SIDE TO SIDE LOCKUP WILL NOT ENGAGE WITH CTIS IN
EMERGENCY WITH TRANSFER CASE IN LOW.
INITIAL SETUP
1.
Are differential lockup
cylinder air lines free of
damage, crimps or leaks and
are fittings free of leaks?
Replace air lines
(Para 12-36) and
schematic
Fig 2-73).
Verify repair, go to
Step 16 of this Fault.
START
YES
NO
Dash lights operate indicating
circuit breaker CB8 OK.
Horn operates indicting circuit
breaker CB16 OK.
Air lines and/or fittings faulty.
Differential lockup solenoid
valve faulty.
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 S 13 faulty.
Wire 1095 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
Audible inspection.
If differential lockup cylinder air
lines or fittings are loose or
damaged, cylinders will not
operate due to loss of air
pressure.
2-33. AXLES TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanics: Automotive
(Item 74, Appendix G)
STE/ICE-R (Optional) (Item 3, Appendix G)
Multimeter (Item 44, Appendix G)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
Note
Use soap solution to check for air leaks.
Materials/Parts
Solution, Soap (Item 86, Appendix C)
Adhesive (Item 8, Appendix C)
WARNING
Read WARNING
on Page 2-2983
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