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
9. Disconnect harness connec-
Function in One or More Speeds
tor C-C74 (WP 0018, Figure
- Continued
45) from AC-C4 (WP 0018,
Figure 272).
10. Turn battery disconnect switch Circuit Breaker #4 OK - Proceed
and ignition switch to ON posi- to step 11.
tion (TM 5-2410-240-10).
Circuit Breaker #4 Not OK -
Proceed to Test Step 8.
11. Turn blower fan switch to low
Circuit Breaker #4 OK - Proceed
fan speed (TM 5-2410-240-
to Test Step 11.
10).
Circuit Breaker #4 Not OK -
Replace lower cab wiring harness
(WP 0228). Ensure all harness
connectors are reconnected. Verify
proper operation of machine
(TM 5-2410-240-10).
12. Turn ignition switch and bat-
tery disconnect switch to OFF
position (TM 5-2410-240-10).
13. Disconnect harness connec-
tor C-C44 (WP 0018, Figure
33) from AC-C1 (WP 0018,
Figure 1).
14. Disconnect harness connec-
tor C-C74 (WP 0018, Figure
45) from AC-C4 (WP 0018,
Figure 272).
15. Turn battery disconnect switch
and ignition switch to ON posi-
tion (TM 5-2410-240-10).
16. Turn blower fan switch to low
fan speed (TM 5-2410-240-
10).
17. Using digital multimeter, mea-
Voltage Less Than Specified
sure for voltage (WP 0283)
Range - Proceed to step 18.
between harness connector
Voltage Within Specified Range
C-C44 (WP 0018, Figure 33)
- Proceed to Test Step 11.
terminal 3 and harness con-
nector C-C74 (WP 0018, Fig-
ure 45) terminal 4.
There should be approximately 18
to 26 volts.
0021-10