TM 5-3805-298-23-1
0120
Table 1. Air Conditioning (A/C) Compressor Will Not Engage - Continued.
0120
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 9. Test Blowers Circuit
Air Conditioning (A/C)
Breaker Reset.
Compressor Will Not
1. Turn battery disconnect switch ON
Engage - Continued
and start the machine (TM 5-3805-
298-10).
2. Turn heater A/C switch to A/C ON
position (TM 5-3805-298-10).
3. Turn heater control knob to
maximum cold (TM 5-3805-298-
10).
4. Check if compressor clutch
Compressor Clutch Engages
engages.
Proceed to Test Step 14.
Compressor Clutch Does not
Engage Proceed to Test Step 10.
Test Step 10. Test for Shorted A/C
Compressor Arc Suppressor.
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Disconnect connector EN-C11
(WP 0012, Figure 123) from A/C
compressor arc suppressor
(WP 0012, Figure 124).
3. Using digital multimeter
Continuity Replace A/C compressor
(WP 0174), measure diode
arc suppressor (WP 0012, Figure 124).
continuity between A/C
Proceed to Test Step 14.
compressor arc suppressor
No Continuity Proceed to step 4.
(WP 0012, Figure 124) terminal 1
(red lead) and terminal 2 (black
lead).
4. Using digital multimeter
Continuity Proceed to Test Step 11.
(WP 0174), measure diode
No Continuity Replace A/C
continuity between A/C
compressor arc suppressor (WP 0012,
compressor arc suppressor (WP
Figure 124).
0012, Figure 124) terminal 1 (black
Proceed to Test Step 14.
lead) and terminal 2 (red lead).
Test Step 11. Test for Shorted Wiring
Harness.
1. Remove blowers circuit breaker
(TM 5-3805-298-10).
2. Remove condenser cover
(WP 0417).
3. Disconnect connector M-C15
(WP 0012, Figure 129) from
connector MA-C2 (WP 0012,
Figure 130).
0120-5
