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TM 9-2320-364-20-4
2-3053/(2-3054 blank)
(1) Set multimeter select switch to volts
dc.
(2) Connect positive (+) multimeter
lead to relay R33 terminal,
terminal 87.
(3) Connect negative () multimeter
lead to a known good ground.
(4) 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,
replace relay R33 (Para 7-95).
(b) If 22 to 28 vdc are present,
repair wire 1644 (see schematic
Fig 2-74) or notify DS
Maintenance.
(5) Turn OFF arctic heater switch.
(6) Install relay R33 in terminal.
(7) Close front access cover.
(8) Install heater control cover and four
screws.
(9) Install heater compartment panel
and eight screws.
(10) Install two ECB covers and 15
screws.
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 arctic heater switch to START,
then to ON position
(TM 9-2320-364-10).
(a) If water pump does not operate,
fault not corrected. Notify DS
Maintenance.
(b) If water pump operates, fault
has been corrected.
(2) Turn OFF arctic heater switch.
VERIFY REPAIR
NOTE
Relay test must be performed with relay
partially removed.
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