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TM 9-2320-364-20-2
2-1354
22. CLEARANCE, SIDE MARKER, AND ID LIGHT(S) DO NOT OPERATE (CONT).
Taillights operate indicating
10 to 14 vdc to wire 1008.
Circuit breakers CB2 and CB4
not tripped.
Work lights operate indicating
10 to 14 vdc to CB2.
Side marker light lamp or
LED OK.
Wire 1012 OK.
Side marker light OK.
Circuit breaker CB2 OK.
Wire 1835 OK.
Wire 1920 OK.
Relay R2 wire 1435 OK.
Clearance lights relay R2 faulty.
Wire 1012 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If 10 to 14 vdc are measured,
wire 1012 is faulty.
If 10 to 14 vdc are not
measured, relay R2 is faulty.
YES
NO
Replace clearance
lights relay R2
(Para 7-95).
Verify repair, go to
Step 10 of this Fault.
9.
Are 10 to 14 vdc measured on
wire 1012 at clearance light
relay R2, terminal 87?
Repair wire 1012 (see
schematic Fig 2-34)
or notify DS
Maintenance.
Verify repair, go to
Step 10 of this Fault.
8.
Repair wire 1435 (see
schematic Fig 2-34)
or notify DS
Maintenance.
Verify repair, go to
Step 10 of this Fault.
YES
NO
Taillights operate indicating
10 to 14 vdc to wire 1008.
Circuit breakers CB2 and CB4
not tripped.
Work lights operate indicating
10 to 14 vdc to CB2.
Side marker light lamp or
LED OK.
Wire 1012 OK.
Side marker light OK.
Circuit breaker CB2 OK.
Wire 1835 OK.
Wire 1920 OK.
Relay R2 wire 1435 faulty.
Clearance lights relay R2 faulty.
Wire 1012 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If relay R2 is not grounded
through wire 1435, clearance,
side marker, and ID lights will
not operate.
WARNING
WARNING
Is continuity measured on
wire 1435 between clearance
lights relay R2, terminal 86
and a known good ground?
Read WARNING
on Page 2-1355
Read WARNING
on Page 2-1355
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