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
11. Disconnect upper cab wiring har-
Will Not Engage - Con-
ness connector R-C22 (WP 0009,
tinued
Figure 386) from climate control
panel (WP 0009, Figure 385) (WP
0293).
12. Using digital multimeter, test for
Resistance 5.0 Ohms or Less -
continuity between harness con-
Replace climate control panel (WP
nector R-C48 (WP 0009, Figure
0293).
384) terminal 2 and harness con-
Connect upper cab wiring harness
nector R-C22 (WP 0009, Figure
connector R-C48 (WP 0009, Figure
386) terminal 6.
384) to A/C On switch (WP 0009, Fig-
Resistance should be less than 5.0
ure 383) (WP 0293).
ohms.
Proceed to step 13.
Resistance More Than 5.0 Ohms -
Replace upper cab wiring harness
(WP 0265).
Proceed to step 13.
13. Using refrigerant reclaimer, per-
form A/C Performance Test (WP
0045).
14. 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.
Test Step 12. Test A/C On Switch
Circuit
1. Install jumper wire between A/C
On Switch harness connector R-
C48 (WP 0009, Figure 384) termi-
nal 2 and terminal 3.
2. Turn battery disconnect and igni-
tion switch to the ON position (TM
5-3805-293-10).
0022-41
