TAILLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP). (Cont) -725550454

TM 9-2330-385-14

14. TAILLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP) (CONT).

KNOWN INFO

TEST OPTIONS

WARNING

Read WARNING

Truck electrical system OK.

on Page 4-202.29

All other lights on trailer

operate.

REASON FOR QUESTION

LED composite light ground

Is continuity measured

(wire 1435) OK.

If wire 1008B or diode assembly

LED composite light OK.

across wire 1008B between

is faulty, voltage is not supplied

12 vdc cable OK.

diode assembly connector

to taillight

Wire 1008B/21 OK.

terminal 7 and rear junction

Wire 1008-1 OK.

box?

POSSIBLE PROBLEMS

Repair wire 1008B

Wire 1008B faulty.

(see schematic, Fig

Diode assembly faulty.

FO-1.1) or replace

trailer main wire

Verify repair, go to

Step 7

of this Fault.

YES

Replace diode

assembly (Para

4-30.1). Verify

repair, go to Step 7

of this Fault.

4-202.28