TM 5-3805-292-23
0006
CHASSIS TROUBLESHOOTING - A/C IS NOT COOLING CAB PROPERLY CONTINUED
AL
Disconnect blower switch (WP 0144).
Run engine at 1000 RPM (TM 5-3805-
292-10).
Does
Connect jumper wire to blower switch
compressor
Replace blower switch
YES
connector HVC4-2, circuit 002 (R),
clutch
harness side, and connector HVC4-1,
engage?
circuit 001A (R), harness side (WP
NO
Reconnect blower switch (WP 0144).
Shut down engine but leave machine
power on. Leave jumper wire in place.
Disconnect A/C compressor
Voltage
Replace A/C compressor (WP 0012).
YES
present?
Measure voltage between A/C
compressor connector AC2, circuit AC
(DB), harness side, and ground (WP
NO
Measure voltage between A/C
pressure switch connector HVC7,
Voltage
Perform Open Harness Test for
circuit 009 (DB), harness side, and
YES
circuit AC (WP 0173).
present?
HVAC).
NO
Measure voltage between thermostat
Voltage
Perform Open Harness Test for
connector HJC4, circuit 008B (DB),
YES
harness side, and ground (WP 0175,
present?
circuit 009 (WP 0173).
Frame 5. HVAC).
NO
Measure voltage between A/C switch
Remove jumper wire. Perform
Voltage
HVC5-3, circuit 002 (R), harness
Open Harness Test for circuit 002
NO
present?
5. HVAC).
YES
Remove jumper wire. Perform Open
Harness Test for circuit 008 (WP 0173).
