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
Test Step 5. Test Headliner Wiring
Continued
Harness for High Resistance or
Open.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-296-10).
2. Connect jumper wire between
terminal 1 and terminal 2
of connector H-C14
(WP 0012, Figure 227).
3. Disconnect connector W-C2
(WP 0012, Figure 224)
from connector H-C7
(WP 0012, Figure 225).
4. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Proceed to Test Step 6.
between connector H-C7
Resistance Greater Than 5.0 Ohms
terminal 4 and terminal 10
Replace headliner wiring harness
(WP 0012, Figure 225).
(WP 0497).
Install fuse F31 on circuit breaker panel
(TM 5-3805-296-10).
Proceed to Test Step 10.
Test Step 6. Test Main Cab Wiring
Harness for High Resistance or
Open.
1. Remove jumper wire from
terminal 1 and terminal 2 of
connector H-C14 (WP 0012,
Figure 227).
2. Disconnect connector CG-C1
(WP 0012, Figure 283)
from connector W-C8
(WP 0012, Figure 282).
3. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Proceed to step 4.
between connector W-C2
Resistance Greater Than 5.0 Ohms
terminal 10 (WP 0012, Figure 224)
Replace main cab wiring harness
and ground.
(WP 0505).
Install fuse F31 on circuit breaker panel
(TM 5-3805-296-10).
Proceed to Test Step 10.
0135-4
