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
3. Connect rear air conditioning wir-
Will Not Engage - Con-
ing harness connector AW-C1
tinued
(WP 0009, Figure 263) to rear
chassis wiring harness connector
FA-C32 (WP 0009, Figure 262).
4. Disconnect rear chassis wiring
harness connector FA-C20 (WP
0009, Figure 113) from transmis-
sion ECM J1 (WP 0009, Figure
112) (WP 0137).
5. Using digital multimeter, test for
Resistance 5.0 Ohms or Less -
continuity between harness con-
Proceed to step 6.
nector FA-C35 (WP 0009, Figure
Resistance More Than 5.0 Ohms -
15) terminal 18 and harness con-
Replace rear air conditioning wiring
nector FA-C20 (WP 0009, Figure
harness (WP 0185).
113) terminal 14.
Connect rear chassis wiring harness
Resistance should be less than
connector FA-C20 (WP 0009, Figure
5.0 Ohms.
113) to transmission ECM J1 (WP
0009, Figure 112) (WP 0137).
Proceed to step 8.
6. Disconnect rear air conditioning
wiring harness connector AW-C1
(WP 0009, Figure 263) from rear
chassis wiring harness connector
FA-C32 (WP 0009, Figure 262).
7. Using digital multimeter, test for
Continuity - Replace rear chassis
continuity between harness con-
wiring harness (WP 0188).
nector FA-C35 (WP 0009, Figure
Proceed to step 8.
15) terminal 18 and all other ter-
No Continuity - Proceed to Test Step
minals on harness connector FA-
11.
C35 and to machine ground.
There should be no continuity.
8. Using refrigerant reclaimer, per-
form A/C Performance Test (WP
0045).
9. Monitor and record low pressure
A/C Performance Test OK - Remove
and high pressure gauges.
A/C Refrigerant Reclaimer. Trouble-
shooting complete.
A/C Performance Test Not OK -
Repeat troubleshooting from the
beginning.
0022-39
