TM 5-3805-296-23-2
0135
Table 1. Defrost Fan Fails To Operate Continued.
0135
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Defrost Fan Fails To Operate
4. Using digital multimeter
Continuity Replace main cab wiring
Continued
(WP 0540), test for continuity
harness (WP 0505).
between connector W-C2
Install new fuse F31 on circuit breaker
terminal 4 (WP 0012, Figure 224)
panel (TM 5-3805-296-10).
and all other terminals
Proceed to Test Step 10.
in connector W-C2
No Continuity Replace headliner
(WP 0012, Figure 224).
wiring harness (WP 0497).
Install new fuse F31 on circuit breaker
panel (TM 5-3805-296-10).
Proceed to Test Step 10.
Test Step 10. Verify Malfunction is
Resolved.
1. Ensure all harness connectors are
connected.
2. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-296-10).
3. Operate defrost fan in low speed
Fan Operates in Both Speed
and high speed
Troubleshooting complete.
(TM 5-3805-296-10).
Fan Operates Only in One Speed
Replace defrost fan (WP 0473).
Fan Does Not Operate Repeat
troubleshooting from the beginning.
END OF WORK PACKAGE
0135-7/(8 blank)
