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. Using digital multimeter, test for
Voltage 18 to 26 Volts - Replace
Will Not Engage - Con-
voltage between harness connec-
transmission ECM (WP 0137).
tinued
tor FA-C20 (WP 0009, Figure 113)
Remove jumper wire from A/C On
terminal 24 and machine ground.
Switch harness connector R-C48 (WP
Voltage should be 18 to 26 volts.
0009, Figure 384) terminal 2 and ter-
minal 3.
Connect harness connector AW-C9
(WP 0009, Figure 267) from refriger-
ant low pressure switch (WP 0009,
Figure 266) (WP 0097).
Connect harness connector FA-C8
(WP 0009, Figure 396) to A/C clutch
relay (WP 0009, Figure 395) (WP
0189).
Connect upper cab wiring harness
connector R-C48 (WP 0009, Figure
384) to A/C On switch (WP 0009, Fig-
ure 383) (WP 0293).
Connect upper cab wiring harness
connector R-C22 (WP 0009, Figure
386) to climate control panel (WP
0009, Figure 385) (WP 0293).
Proceed to step 10.
Voltage Less Than 18 Volts - Pro-
ceed to step 4.
4. Remove jumper wire from A/C On
Switch harness connector R-C48
(WP 0009, Figure 384) terminal 2
and terminal 3.
5. Turn ignition switch and battery
disconnect switch to the OFF
position (TM 5-3805-293-10).
6. Disconnect cab upper harness
connector R-C1 (WP 0009, Figure
33) from cab lower harness con-
nector P-C3 (WP 0009, Figure 34)
(WP 0265).
0022-42
