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
2. Using digital multimeter, switch
Continuity With Leads In One Posi-
Will Not Engage - Con-
leads on refrigerant compressor
tion Only - Connect rear air condition-
tinued
arc suppressor (WP 0009, Figure
ing wiring harness connector AW-C3
264) and test for continuity termi-
(WP 0009, Figure 265) to refrigerant
nal 1 and terminal 2.
compressor arc suppressor (WP
Monitor and record resistance.
0009, Figure 264) (WP 0098).
Proceed to Test Step 8.
Continuity With Leads In Both
Positions Or No Continuity With
Leads In Either Position - Replace
refrigerant compressor arc suppres-
sor (WP 0098).
If refrigerant low pressure switch did
not have continuity in Test Step 6,
replace refrigerant low pressure
switch (WP 0097).
If refrigerant pressure switch did not
have continuity in Test Step 6, replace
refrigerant low pressure switch (WP
0097).
Connect harness connector AW-C2
(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-C1 (WP 0009,
Figure 263) to rear chassis wiring har-
ness connector FA-C32 (WP 0009,
Figure 262) (WP 0185).
Connect harness connector FA-C8
(WP 0009, Figure 396) to A/C clutch
relay (WP 0009, Figure 395) (WP
0189).
Proceed to step 3.
3. Using refrigerant reclaimer, per-
form A/C Performance Test (WP
0045).
4. 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.
0022-34
