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 24 vdc 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) Disconnect A/C switch harness
connector from A/C control switch.
(2) Set A/C control switch to low blower
speed (counter-clockwise) position
(WP 0008 00).
(3) Set multimeter switch to ohms.
(4) Is there continuity measured across A/
C control switch low blower speed
contacts?
(a) If there is no continuity, replace A/
C control switch (WP 0021 00).
Verify repair, go to Step 18 of this
fault.
(b) If there is continuity repair A/C
switch harness wire RED #1 (See
WP 0057 00, Fig j) or notify DS
Maintenance. Verify repair, go to
Step 18 of this fault.
VISUAL INSPECTION
(1) Ensure engine switch is in the ON
position (TM 9-2320-360-10).
(2) Turn A/C control switch to low blower
speed (counter-clockwise) position
(WP 0008 00).
(a) If A/C blower does not operate,
turn engine switch to OFF position
HETF00220
and replace A/C blower resistor
(WP 0023 00). Verify repair, go to
Step 18 of this fault.
(b) If A/C blower operates, turn engine
switch to OFF position and go to
Step 10 of this fault.
0016 00-11