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
4. Refrigerant Compressor
9. Using digital multimeter, test
Resistance Between 17.0 Ohms
Will Not Engage - Con-
resistance between refrigerant
and 18.2 Ohms - Proceed to step 10.
tinued
compressor clutch solenoid (WP
Resistance Less Than 17.0 Ohms
0009, Figure 260) terminal 1 and
or More Than 18.2 Ohms - Replace
terminal 2.
refrigerant compressor (WP 0096).
Resistance should be between 17.0
Connect harness connector AW-C2
and 18.2 ohms.
(WP 0009, Figure 261) to A/C com-
pressor clutch solenoid (WP 0009,
Figure 260) (WP 0185).
Connect rear air conditioning wiring
harness connector AW-C3 (WP 0009,
Figure 265) to refrigerant compressor
arc suppressor (WP 0009, Figure
264) (WP 0098).
Connect rear air conditioning wiring
harness connector AW-C9 (WP 0009,
Figure 267) to refrigerant compressor
low pressure switch (WP 0009, Figure
266) (WP 0097).
Proceed to step 17.
10. Disconnect harness connector
FA-C8 (WP 0009, Figure 396)
from A/C clutch relay (WP 0009,
Figure 395) (WP 0189).
11. Install a jumper wire between har-
ness connector FA-C8 (WP 0009,
Figure 396) terminal 1 and termi-
nal 4.
12. Using digital multimeter, test for
Resistance 5.0 Ohms or Less - Pro-
continuity between harness con-
ceed to Test Step 5, step 4.
nector AW-C2 (WP 0009, Figure
Resistance More Than 5.0 Ohms -
261) terminal 2 and machine
Proceed to step 13.
ground.
Resistance should be less than
5.0 ohms.
13. Using digital multimeter, test for
Resistance 5.0 Ohms or Less - Pro-
continuity between harness con-
ceed to step 14.
nector AW-C2 (WP 0009, Figure
Resistance More Than 5.0 Ohms -
261) terminal 2 and harness con-
Replace rear air conditioning wiring
nector AW-C3 (WP 0009, Figure
harness (WP 0185).
265) terminal 2.
Proceed to step 17.
Resistance should be less than
5.0 ohms.
0022-28