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TM 9-2320-364-20-4
2-3051
(1) Connect positive (+) multimeter lead
to relay R33, terminal 86.
(2) Connect negative (–) multimeter lead
to a known good ground.
(3) Set arctic heater switch to START and
then to ON position
(TM 9-2320-364-10).
(a) If 22 to 28 vdc are not present,
turn OFF arctic heater switch and
replace wire 1644 (see schematic
Fig 2-74) or notify DS
Maintenance.
(b) If 22 to 28 vdc are present,
wire 1644 is OK. Go to Step 9
of this Fault.
(4) Turn OFF arctic heater switch.
VOLTAGE TEST
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical
circuits, a direct short may result. Damage to equipment, injury or death to personnel may occur.
(1) Set multimeter select switch to ohms.
(2) Is there continuity between relay R33,
terminal 85 and a known good
ground?
(a) If there is no continuity, repair
wire 1435 (see schematic
Fig 2-74) or notify DS
Maintenance.
(b) If there is continuity, wire 1435
is OK.
CONTINUITY TEST
NOTE
Relay test must be performed with relay
partially removed.
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