TB 9-2320-360-13&P-1
WARN I N G
Jewelry can catch on equipment and cause injury or short across electrical circuit and cause severe
burns or electrical shock. Remove rings, bracelets, watches, necklaces, and any other jewelry before
working around HET Tractor.
A/C circuit breaker, A/C relay, and 24vdc magnetic switch (R22) are always electrically hot and can
cause severe injury to personnel. Care must be exercised when working around these components.
CONTINUITY TEST.
(1) Remove three electronic control box
assembly covers (TM 9-2320-360-20).
(2) Disconnect wire to A/C high pressure
switch from A/C engine fan control
solenoid circuit breaker.
(3) Is there continuity measured across
A/C engine fan control solenoid circuit
breaker terminals?
(a) If there is no continuity, replace
A/C engine fan control solenoid
circuit breaker (WP 0024 00).
Verify repair, go to Step 10 of this
fault.
(b) If there is continuity, repair A/C
engine control solenoid 12 vdc
supply circuit wires (blue or yellow
wires) (See WP 0057 00, Fig j) or
notify DS Maintenance. Verify
repair, go to Step 10 of this fault.
VISUAL INSPECTION
(1) Ensure air line on output of A/C engine
control solenoid valve is loose.
(2) Remove jumper from A/C compressor
receiver/dryer harness A/C high
pressure switch connector terminals.
(a) If air pressure is present, replace
A/C engine fan control solenoid
(WP 0026 00). Verify repair, go to
Step 10 of this fault.
(b) If air pressure is not present, turn
engine switch and A/C control
switch to OFF position, connect
A/C compressor receiver/dryer
harness connector to A/C high
pressure switch (WP 0029 00),
tighten air line on output of A/C
engine control solenoid valve
(WP 0026 00) and notify DS
Maintenance.
HETF00455
0019 00-9