TB 9-2320-360-13&P-1
WAR N 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.
VOLTAGE TEST
(1) Turn engine switch to ON position
(TM 9-2320-360-10).
(2) Place positive (+) probe of multimeter
on orange wire at A/C relay terminal.
(3) Place negative (-) probe of multimeter
on ground.
(a) If 22 to 28 vdc are not measured,
turn engine switch to OFF position,
and go to Step 4 of this fault.
(b) If 22 to 28 vdc are measured, turn
engine switch to OFF position, and
go to Step 3 of this fault.
VOLTAGE TEST
(1) Remove A/C switch harness connector
from A/C control switch.
(2) Turn engine switch to ON position
(TM 9-2320-360-10).
(3) Place positive (+) probe of multimeter
on orange wire from A/C relay at A/C
switch harness connector.
(4) Place negative (-) probe of multimeter
on ground.
(a) If 22 to 28 vdc are not measured,
turn engine switch to OFF position,
and repair orange wire (see WP
0057 00, Fig j) or notify DS
Maintenance. Verify repair, go to
Step 8 of this fault.
(b) If 22 to 28 vdc are measured,
replace A/C control switch
(WP 0021 00). Verify repair, go to
Step 8 of this fault.
HETF00275
0015 00-5