TM 5-3805-298-23-1
0119
Table 1. Blower Motor Does Not Operate in One or More Speeds - Continued.
0119
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. Using digital multimeter
Continuity Replace blower motor
Blower Motor Does Not
(WP 0174), test for continuity
(WP 0420).
Operate in One or More
between connector A-C1
Speeds - Continued
Proceed to Test Step 18.
(WP 0012, Figure 113) terminal 2
No Continuity Replace cab heater
and connector A-C2 (WP 0012,
wiring harness (WP 0410).
Figure 114) terminal 2.
Proceed to Test Step 18.
Test Step 12. Test for Open Cab
Heater Wiring Harness.
1. Remove seat assembly and
pedestal (WP 0355).
2. Disconnect connector A-C1
(WP 0012, Figure 113) from blower
motor.
3. Using digital multimeter
Continuity Proceed to step 4.
(WP 0174), test for continuity
No Continuity Proceed to Test
between connector A-C1
Step 15.
(WP 0012, Figure 113) terminal 1
and connector A-C2 (WP 0012,
Figure 114) terminal 4.
4. Using digital multimeter
Continuity Replace blower motor
(WP 0174), test for continuity
(WP 0420).
between connector A-C1
Proceed to Test Step 18.
(WP 0012, Figure 113) terminal 1
No Continuity Proceed to Test
and connector A-C2 (WP 0012,
Step 15.
Figure 114) terminal 5.
Test Step 13. Test for Shorted Cab
Heater Wiring Harness.
1. Remove seat assembly and
pedestal (WP 0355).
2. Disconnect connector A-C1
(WP 0012, Figure 113) from blower
motor.
3. Using digital multimeter
Continuity Replace cab heater wiring
(WP 0174), test for continuity
harness (WP 0410).
between connector A-C1
Proceed to Test Step 18.
(WP 0012, Figure 113) terminal 1
No Continuity Proceed to step 4.
and terminal 2.
4. Using digital multimeter
Continuity Replace cab heater wiring
(WP 0174), test for continuity
harness (WP 0410).
between connector A-C1
Proceed to Test Step 18.
(WP 0012, Figure 113) terminal 1
No Continuity Replace blower motor
and ground.
(WP 0420).
Proceed to Test Step 18.
0119-6
