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![]() TM 9-2330-385-14
21. ALL MARKER LIGHTS AND TAILLIGHTS DO NOT OPERATE
(S/N YB6122 075 AND UP) (CONT).
2.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Voltage test.
Truck electrical system OK.
24 vdc cable OK.
REASON FOR QUESTION
Are 22 to 28 vdc measured on
If there are not 22 to 28 vdc
wire 1008C at diode assembly
POSSIBLE PROBLEMS
present on wire 1008C at
diode assembly connector or if
connector terminal 10 and
Wire 1008C-6 faulty.
diode assembly is faulty,
12?
Diode assembly faulty.
marker lights and tail lights will
not operate.
Repair wire 1008C-6
(see schematic, Fig
FO-1.1) or replace
trailer main wire
NO
harness (Para
4-30.1). Verify repair,
go to Step 3 of this
Fault.
YES
Replace diode
assembly (Para
4-30.1). Verify repair,
go to Step 3 of this
Fault.
4-118.64
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