Quantcast 3.  INTERAXLE FRONT TO REAR LOCKUP WILL NOT ENGAGE WITH CTIS IN MUD, SAND AND SNOW (CONT).

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Page Title: 3. INTERAXLE FRONT TO REAR LOCKUP WILL NOT ENGAGE WITH CTIS IN MUD, SAND AND SNOW (CONT).
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CONTINUITY TEST - TM-9-2320-364-20-4_72
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TM-9-2320-364-20-4 Palletized Load System (PLS) M1074/M1075 Manual
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CONTINUITY TEST - TM-9-2320-364-20-4_74
TM 9-2320-364-20-4 2-3014 3.  INTERAXLE FRONT TO REAR LOCKUP WILL NOT ENGAGE WITH CTIS IN MUD, SAND AND SNOW (CONT). Dash lights operate indicating   circuit breaker CB8 OK. Horn operates indicating circuit   breaker CB16 OK. Air system OK indicating air   input to interaxle lockup   solenoid valve. Interaxle lockup cylinder hoses   OK. Interaxle lockup solenoid valve   OK. Wire 1435 OK. Interaxle lockup solenoid OK. Wire 1882 OK. Wire 1888 OK. Wire 1884 OK. CTIS controller OK. INTERAXLE relay R20 faulty. Wire 1889 faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If 10 to 14 vdc are not present at INTERAXLE relay R20, terminal 87, relay R20 is faulty and power will not be supplied to the interaxle lockup solenoid valve. YES NO Replace INTERAXLE relay R20 (Para 7-95). Verify repair, go to Step 10 of this Fault. 9. Are 10 to 14 vdc measured on INTERAXLE relay R20, terminal 87? Repair wire 1889 (see schematic Fig 2-72) or notify DS Maintenance. Verify repair, go to Step 10 of this Fault. 8. Is continuity measured on wire 1435 between INTERAXLE relay R20, terminal 85 and a known good ground? YES NO Dash lights operate indicating   circuit breaker CB8 OK. Horn operates indicating circuit   breaker CB16 OK. Air system OK indicating air   input to interaxle lockup   solenoid valve. Interaxle lockup cylinder hoses   OK. Interaxle lockup solenoid valve   OK. Wire 1435 OK. Interaxle lockup solenoid OK. Wire 1882 OK. Wire 1888 OK. Wire 1884 OK. CTIS controller faulty. INTERAXLE relay R20 faulty. Wire 1889 faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Continuity test. STE/ICE-R #91. If there is no continuity between INTERAXLE relay R20, terminal 85 and a known good ground, relay R20 will not operate. WARNING WARNING Replace CTIS controller (Para 13-7). Verify repair, go to Step 10 of this Fault. Read   WARNING on Page 2-3015 Read   WARNING on Page 2-3015

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