TM 5-3805-296-23-2
0134
Table 1. Blower Motor Does Not Operate in One or More Speeds Continued.
0134
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 33. Test Main Cab Wiring
Blower Motor Does Not
Harness for High Resistance or
Operate in One or More
Open.
Speeds Continued
1. Remove jumper wire from
terminal 5 and terminal 6 of
connector H-C3 (WP 0012,
Figure 250).
2. Connect jumper wire between
terminal 2 and terminal 3 of
connector W-C22 (WP 0012,
Figure 271).
3. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Replace fan speed switch (WP 0467).
between connector W-C2
Proceed to Test Step 38.
terminal 5 and terminal 12
Resistance Greater Than 5.0 Ohms
(WP 0012, Figure 224).
Replace main cab wiring harness
(WP 0505).
Proceed to Test Step 38.
Test Step 34. Test Voltage to Air
Conditioner Wiring Harness.
1. Turn fan speed switch to
position O (TM 5-3805-296-10).
2. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-296-10).
3. Disconnect connector W-C22
(WP 0012, Figure 271) from
connector CA-C1
(WP 0012, Figure 272).
4. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-296-10).
5. Turn fan speed switch to position
III (TM 5-3805-296-10).
6. Using digital multimeter
Voltage 18 to 26 V Proceed to Test
(WP 0540), test for voltage
Step 35.
between connector W-C22
Voltage Less Than 18 V Proceed to
terminal 3 and terminal 6
Test Step 36.
(WP 0012, Figure 271).
Test Step 35. Test Air Conditioner
Wiring Harness for High Resistance
or Open.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-296-10).
2. Remove HVAC access cover
(WP 0479).
0134-34