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TM 9-2320-364-20-2
2-1562
45. TRAILER BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT).
2.
Repair wire 1676
(see schematic
Fig 2-35) or notify
DS Maintenance.
Verify repair, go to
Step 6 of this Fault.
YES
NO
Trailer stoplights operate,
indicating wire 1435 at
connector MC15 OK.
22 to 28 vdc supplied to
connector MC15.
Wire 1676 faulty.
Wire 1678 faulty.
Wire 1435 faulty.
Trailer blackout stoplight relay
R13 faulty.
Wire 1678C 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 1676 is faulty.
WARNING
3.
Repair wire 1678
(see schematic
Fig 2-35) or notify
DS Maintenance.
Verify repair, go to
Step 6 of this Fault.
YES
NO
Trailer stoplights operate,
indicating wire 1435 at
connector MC15 OK.
22 to 28 vdc supplied to
connector MC15.
Wire 1676 OK.
Wire 1678 faulty.
Wire 1435 faulty.
Trailer blackout stoplight relay
R13 faulty.
Wire 1678C 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 1678 is faulty.
WARNING
Are 22 to 28 vdc measured on
wire 1676 at trailer blackout
stoplights relay R13,
terminal 30?
Are 22 to 28 vdc measured on
wire 1678 at trailer blackout
stoplights relay R13,
terminal 86?
Read WARNING
on Page 2-1563
Read WARNING
on Page 2-1563
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