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TM 9-2320-364-20-4
2-3048
1. ARCTIC KIT WATER PUMP DOES NOT OPERATE (CONT).
6.
Is continuity measured
between terminals 5 and 2,
and terminals 5 and 4 when
arctic heater switch is in start
position?
Replace arctic heater
switch (Para 21-3).
Verify repair, go to
Step 11 of this Fault.
YES
NO
Arctic batteries OK.
Blackout stop lights operate
indicating CB20 is OK.
Wire 1435 OK.
Water pump OK.
Wire 1431 from connector
MC119 to CB20 OK.
Wire 1431 between relays R32
and arctic heater switch OK.
Relay R32 OK.
Arctic heater switch faulty.
Wire 1644 faulty.
Relay R33 not grounded.
Relay R33 faulty.
Wire 1644 to water pump
faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If continuity is not present at
either terminal, arctic heater
switch is faulty.
WARNING
7.
Are 22 to 28 vdc measured on
wire 1645 at relay R33,
terminal 30?
Repair wire 1645 (see
schematic Fig 2-74)
or notify DS
Maintenance.
Verify repair, go to
Step 11 of this Fault.
YES
NO
Arctic batteries OK.
Blackout stop lights operate
indicating CB20 is OK.
Wire 1435 OK.
Water pump OK.
Wire 1431 from connector
MC119 to CB20 OK.
Wire 1431 between relays R32
and arctic heater switch OK.
Relay R32 OK.
Arctic heater switch OK.
Wire 1644 faulty.
Relay R33 not grounded.
Relay R33 faulty.
Wire 1644 to arctic water faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If 22 to 28 vdc are not present,
wire 1645 is faulty.
WARNING
Read WARNING
on Page 2-3049
Read WARNING
on Page 2-3049
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