TB 9-2320-302-13&P-3
A/C TROUBLESHOOTING PROCEDURES - CONTINUED
0013 00
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
A/C ELECTRICAL SYSTEM - CONTINUED
(f) Return equipment to normal
3.
Evaporator Assembly Works But
condition.
Engine Fan Does Not -
Continued.
Evaporator Assembly Works But 1. Verify power at compressor.
4.
Compressor Does Not.
(a) Disconnect green diode harness
from compressor clutch connector.
(b) Turn ignition key switch to the ON
position (TM 9-2320-363-10).
(c) Set A/C fan switch to the ON
position (WP 0004 00).
(d) Check for 24 VDC on green
1. If 24 VDC is not indicated,
connector to vehicle ground.
proceed to step 4.
2. If 24 VDC is indicated, proceed to
next step.
2. Verify ground connection at compressor
frame.
(a) Turn ignition key switch to the OFF
position (TM 9-2320-363-10).
(b) Set A/C fan switch to the OFF
position (WP 0004 00).
(c) Check for continuity between
1. If continuity is not indicated,
compressor frame and vehicle
repair ground on compressor.
ground.
2. If continuity is indicated, proceed
to next step.
(d) Return equipment to normal
condition.
3. Verify operation of compressor clutch.
(a) Start engine (TM 9-2320-363-10).
(b) Set A/C fan switch to the ON
position (WP 0004 00).
(c) Verify compressor clutch engages. 1. If compressor clutch engages,
proceed to step 13.
2. If compressor clutch does not
engage, replace compressor.
(d) Return equipment to normal
condition.
4. Check diode shorted to ground.