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
Test Step 10. Test for Open Lower
Blower Motor Does Not
Cab Wiring Harness.
Operate in One or More
1. Turn ignition switch and battery
Speeds - Continued
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Disconnect connector C-C25
(WP 0012, Figure 115) from
connector A-C2 (WP 0012,
Figure 114).
3. Turn blower switch to position I
(TM 5-3805-298-10).
4. Turn ignition switch and battery
disconnect switch to ON position
(TM 5-3805-298-10).
5. Using digital multimeter
Voltage 18 to 26 V Proceed to step 6.
(WP 0174), measure voltage
Voltage Less Than 18 V Proceed to
between C-C25 (WP 0012,
Test Step14.
Figure 115) terminal 2 and terminal
5.
6. Turn blower switch to position II
(TM 5-3805-298-10).
7. Using digital multimeter
Voltage 18 to 26 V Proceed to step 8.
(WP 0174), measure voltage
Voltage Less Than 18 V Proceed to
between C-C25
Test Step14.
(WP 0012, Figure 115) terminal 2
and terminal 4.
8. Turn blower switch to position III
(TM 5-3805-298-10).
9. Using digital multimeter
Voltage 18 to 26 V Turn ignition
(WP 0174), measure voltage
switch and battery disconnect switch to
between C-C25
OFF position (TM 5-3805-298-10).
(WP 0012, Figure 115) terminal 2
Proceed to Test Step 12.
and terminal 3.
Voltage Less Than 18 V Proceed to
Test Step14.
Test Step 11. 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 Replace cab heater
between connector A-C1
wiring harness (WP 0410).
(WP 0012, Figure 113) terminal 1
Proceed to Test Step 18.
and connector A-C2 (WP 0012,
Figure 114) terminal 3.
0119-5