TM 5-3805-293-23-2
0022
Table 1. Cab Heating, Air Conditioning, and 12 Volt Power Inverter Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. Blower Motor Does Not
3. Disconnect cab lower wiring har-
Turn On In One or More
ness connector P-C3 (WP 0009,
Speeds - Continued
Figure 34) from cab upper wiring
harness connector R-C1 (WP
0009, Figure 33) (WP 0266).
4. Using digital multimeter, test for
Resistance 5.0 Ohms or Less - Pro-
continuity between harness con-
ceed to step 5.
nector R-C22 (WP 0009, Figure
Resistance More Than 5.0 Ohms -
386) terminal 4 and harness con-
Replace cab upper wiring harness
nector R-C1 (WP 0009, Figure
(WP 0265).
33) terminal 20.
Proceed to step 15.
Resistance should be less than
5.0 ohms.
5. Connect cab upper wiring har-
ness connector R-C22 (WP 0009,
Figure 386) to climate control
panel (WP 0009, Figure 385) (WP
0293).
6. Disconnect harness connector P-
C16 (WP 0009, Figure 273) from
harness connector CM-C1 (WP
0009, Figure 272) (WP 0266).
7. Using digital multimeter, test for
Resistance 5.0 Ohms or Less - Pro-
continuity between harness con-
ceed to step 8.
nector P-C3 (WP 0009, Figure 34)
Resistance More Than 5.0 Ohms -
terminal 20 and harness connec-
Replace cab lower wiring harness
tor P-C16 (WP 0009, Figure 273)
(WP 0266).
terminal 1.
Proceed to step 15.
Resistance should be less than
5.0 ohms.
8. Connect cab upper wiring har-
ness connector R-C1 (WP 0009,
Figure 33) to cab lower wiring har-
ness connector P-C3 (WP 0009,
Figure 34) (WP 0266).
9. Disconnect cab lower wiring har-
ness connector B (WP 0009, Fig-
ure 402) from blower resistor
terminal B (WP 0009, Figure 402).
10. Using digital multimeter, test for
Resistance 5.0 Ohms or Less - Pro-
continuity between harness con-
ceed to step 11.
nector CM-C1 (WP 0009, Figure
Resistance More Than 5.0 Ohms -
272) terminal 1 and harness con-
Replace cab lower wiring harness
nector B (WP 0009, Figure 402).
(WP 0266).
Resistance should be less than
Proceed to step 15.
5.0 ohms.
0022-20
