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
4. Disconnect connector M-C25
Air Conditioning (A/C)
(WP 0012, Figure 131) from
Compressor Will Not
connector MC-C1 (WP 0012,
Engage - Continued
Figure 132).
5. Using digital multimeter
Continuity Proceed to Test Step 12.
(WP 0174), test for continuity
No Continuity Test Condenser fan
between connector EN-C11
relay circuits for short to ground
(WP 0012, Figure 123) terminal 1
and ground.
Test Step 12. Test for Shorted
Compressor Clutch Coil.
1. Disconnect connector EN-C10
(WP 0012, Figure 122) from
compressor.
2. Using digital multimeter
16 to 21 Ohms Proceed to step 3.
(WP 0174), measure resistance
Less Than 16 or More Than 21 Ohms
between compressor connector
Replace Compressor (WP 0406).
terminal 1 and terminal 2.
Proceed to Test Step 14.
3. Using digital multimeter
No Continuity Proceed to Test
(WP 0174), test for continuity
Step 13.
between compressor connector
Continuity Replace compressor
terminal 1 and ground.
(WP 0406).
Proceed to Test Step 14.
Test Step 13. Test for Shorted Lower
Cab Wiring Harness.
1. Remove right lower cab access
panels (WP 0347).
2. Disconnect connector EN-C2
(WP 0012, Figure 12) from
connector C-C18 (WP 0012,
Figure 13).
3. Using digital multimeter
Continuity Replace lower cab wiring
(WP 0174), test for continuity
harness (WP 0291).
between connector C-C18
Proceed to Test Step 14.
(WP 0012, Figure 13) terminal 6
No Continuity Replace engine wiring
and terminal 7.
harness (WP 0299).
Proceed to Test Step 14.
Test Step 14. Verify Malfunction Is
Resolved.
1. Ensure all harness connectors are
connected.
2. Install right lower cab access
panels (WP 0347).
0120-6