TM 5-2410-240-23-1
0021
Table 1. Cab Troubleshooting Without Codes. - Continued.
0021
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. HVAC Blower Motor Does Not
5. Verify blower fan operation -
No Fan Speed - Proceed to Test
Function in One or More Speeds
Turn blower fan switch slowly
Step 2.
- Continued
from lowest setting through full
No Low Fan Speed - Proceed to
range of operation (TM 5-
Test Step 3.
2410-240-10). Fan speed
No Medium Fan Speed - Proceed
should increase with each
to Test Step 4.
position.
No Medium - High Fan Speed -
Proceed to Test Step 5.
No High Fan Speed - Proceed to
Test Step 6.
No Medium - High and High Fan
Speed - Test Step 7.
Test Step 2.
1. Turn ignition switch and bat-
tery disconnect switch to OFF
position (TM 5-2410-240-10).
2. Inspect circuit breaker #4 (TM
Circuit Breaker #4 OK - Proceed
5-2410-240-10).
to step 12.
Circuit Breaker #4 Not OK -
Reset circuit breaker (TM 5-2410-
240-10). Proceed to step 3.
3. Turn battery disconnect switch Circuit Breaker #4 OK - Proceed
and ignition switch to ON posi- to step 4.
tion (TM 5-2410-240-10).
Circuit Breaker #4 Not OK - Pro-
ceed to step 6.
4. Turn blower fan switch to low
Circuit Breaker #4 OK - Proceed
fan speed (TM 5-2410-240-
to step 5.
10).
Circuit Breaker #4 Not OK - Pro-
ceed to step 6.
5. Turn blower fan switch to high
Circuit Breaker #4 OK - Proceed
fan speed (TM 5-2410-240-
to step 12.
10).
Circuit Breaker #4 Not OK - Pro-
ceed to step 6.
6. Turn ignition switch and bat-
tery disconnect switch to OFF
position (TM 5-2410-240-10).
7. Reset circuit breaker #4 (TM
5-2410-240-10).
8. Disconnect harness connec-
tor C-C44 (WP 0018, Figure
33) from AC-C1 (WP 0018,
Figure 1).
0021-9
