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Page Title:
REAR SIDE MARKER LIGHTS, REAR MARKER LIGHTS AND TAILLIGHTS DO NOT OPERATE (Cont) |
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 TM 9-2330-385-14
9. REAR SIDE MARKER LIGHTS, REAR MARKER LIGHTS AND TAILLIGHTS DO NOT
OPERATE (CONT).
2.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Voltage test.
Truck electrical system OK.
on Page 4-105
All other trailer lights operate.
REASON FOR QUESTION
Front junction box assembly
OK.
Are 22 to 28 vdc measured on
If voltage is not supplied to rear
wire 1008C-21 at rear junction
junction box assembly on wire
POSSIBLE PROBLEMS
1008C-21 lights will not operate.
box assembly, terminal 21?
Wire 1008C-21 faulty.
Rear junction box assembly
faulty.
Repair wire 1008C-21
(see schematic, Fig
FO-1) or replace wire
NO
harness (Para 4-30).
Verify repair, go to
Step 4 of this Fault.
YES
3.
KNOWN INFO
WARNING
TEST OPTIONS
Read WARNING
Truck electrical system OK.
on Page 4-105
Voltage test.
All other trailer lights operate.
Front junction box assembly
OK.
REASON FOR QUESTION
Are 22 to 28 vdc measured on
Wire 1008C-21 OK.
rear junction box assembly at
If voltage is not measured on
rear junction box power is not
terminal 29?
POSSIBLE PROBLEMS
supplied to lights and rear side
marker lights, rear marker light
Rear junction box assembly
and taillights will not operate.
faulty.
Replace rear junction
box assembly
NO
Verify repair, go to
Step 4 of this Fault.
YES
Fault not corrected.
Notify supervisor.
4-104
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