TM 5-3805-261-23-1
MISCELLANEOUS TROUBLESHOOTING PROCEDURES - CONTINUED
0013 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5.
Test continuity of harness between
Repair harness as necessary (WP 0021
10. Front or Rear Window
defroster motor and defroster switch.
Defroster Does Not Operate
Refer to Electrical System
(CCE Machine) - Continued.
1.
Check hoses and connection to heater
If hose clamps are loose, tighten. If hose
11. Heater Fans and Controls
coil.
Operate, but No Heat (CCE
is damaged or defective, replace (WP
Machine).
Test 2.
2.
Check control valve assembly.
If control valve assembly is damaged or
defective, replace (WP 0212 00). If the
problem still exists, go to Test 3.
3.
Check heater coil.
If coil is blocked, damaged, or defective,
replace (WP 0212 00).
1.
Check main circuit breaker (60A).
Reset circuit breaker. If the problem still
12. Both Heater Fans Fail to
Operate (CCE Machine).
exists, go to Test 2.
2.
Check heater fuse (20A).
If fuse is blown, replace (WP 0097 00). If
the problem still exists, go to Test 3.
3.
Test continuity of heater wiring
If heater wiring harness is damaged or
harness between two heater motors.
defective, replace (WP 0143 00).
Refer to Electrical System
1.
Check heater motor.
If motor is damaged, replace (WP 0212
13. One Heater Fan Fails to
Operate (CCE Machine).
2.
Test continuity of heat switch. Refer
If switch is damaged or defective, replace
to Electrical System Trouble-
go to Test 3.
3.
Test continuity of heater wiring
If heater wiring harness damaged or
harness between heater motor and
defective, replace (WP 0143 00).
heater switch. Refer to Electrical
Check condition of air filter.
If air filter needs replacement, replace
14. Air Cleaner Indicator Fails to
Show Air Filter Condition.
replace (WP 0251 00).
Check air lines with a pressure gauge of
If system is pressurized, replace defective
15. Air Pressure Gauges Fail to
Operate.
known accuracy.
air pressure gauge (WP 0252 00).
1.
Check control valve.
If control valve is worn, damaged, or
16. Differential Lock Is Not
Engaging Correctly.
defective, replace (WP 0306 00). If the
problem still exists, go to Test 2.
