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.
VOLTAGE TEST
(1) Disconnect A/C switch harness
connector from A/C evaporator
harness.
(2) Turn engine switch to ON position
(TM 9-2320-360-10).
(3) Turn A/C control switch to ON (low,
medium, or high blower speed) position
(WP 0008 00).
(4) Place positive (+) probe of multimeter
on brown wire at A/C switch harness
evaporator harness connector.
(5) Place negative (-) probe of multimeter
on ground.
(a) If 22 to 28 vdc is not measured,
turn engine switch to OFF position
and go to Step 12 of this fault.
(b) If 22 to 28 vdc is measured, turn
engine switch to OFF position and
go to Step 11 of this fault.
CONTINUITY TEST
(1) Remove evaporator subsystem
(WP 0036 00).
(2) Remove eight screws and cover from
evaporator assembly (WP 0022 00).
(3) Remove wires from thermostatic switch
terminals.
NOTE: A/C thermostatic switch contacts are
closed when ambient temperature is above
35F (2C).
(4) Is continuity measured across A/C
thermostatic switch terminals, when
ambient temperature is above 35F
(2C)?
(a) If there is no continuity, replace
thermostatic switch (WP 0031 00).
Verify repair, go to Step 13 of this
fault.
(b) If there is continuity, repair brown
wire from A/C evaporator harness
switch harness connector to A/C
binary switch (See WP 0057 00,
Fig j) or notify DS Maintenance.
HETF00449
Verify repair, go to Step 13 of this
fault.
0017 00-13