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
14. Turn ignition switch and bat-
Function in One or More Speeds
tery disconnect switch to OFF
- Continued
position (TM 5-2410-240-10).
15. Disconnect harness connec-
tor EN-C23 (WP 0018,
Figure 139) from A/C high-low
pressure switch jumper
harness.
16. Using digital multimeter, test
No Continuity - Replace engine
for continuity (WP 0283)
wiring harness assembly (WP
between harness connector
0046). Ensure all harness
EN-C23 (WP 0018, Figure
connectors are reconnected.
139) terminal 1 and harness
Verify proper operation of machine
connector EN-C15 (WP 0018,
(TM 5-2410-240-10).
Figure 132) terminal 9.
Continuity - Proceed to step 17.
17. Using digital multimeter, test
No Continuity - Proceed to step
for continuity (WP 0283)
18.
between harness connector
Continuity - Replace engine
EN-C23 (WP 0018,
wiring harness assembly (WP
Figure 139) terminal 1 and
0046). Ensure all harness
engine ground.
connectors are reconnected.
Verify proper operation of machine
(TM 5-2410-240-10).
18. Using digital multimeter, test
No Continuity - Proceed to step
for continuity (WP 0283)
19.
between A/C high-pow pres-
Continuity - Replace A/C high-low
sure switch connector
pressure switch and jumper
(WP 0018, Figure 142) termi-
harness (WP 0208). Ensure all
nal 1 and engine ground.
harness connectors are
reconnected. Verify proper
operation of machine (TM 5-2410-
240-10).
19. Using digital multimeter, test
No Continuity - Proceed to step
for continuity (WP 0283)
20.
between A/C high-low pres-
Continuity - Replace A/C high-low
sure switch connector
pressure switch and jumper
(WP 0018, Figure 142) termi-
harness (WP 0208). Ensure all
nal 2 and engine ground.
harness connectors are
reconnected. Verify proper
operation of machine (TM 5-2410-
240-10).
20. Disconnect harness connec-
tor EN-C9 (WP 0018,
Figure 126) from A/C low pres-
sure switch.
0021-45
