TAILLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP). (Cont) -725550448

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 4-202.22

All other trailer lights operate.

REASON FOR QUESTION

POSSIBLE PROBLEMS

Is continuity measured

If LED composite light ground

Wire 1008B/21 faulty.

between wire 1435 at LED

(wire 1435) is faulty, LED

LED composite light faulty.

composite light will not operate.

composite light, and a known

Wire 1435 faulty.

good ground?

Repair wire 1435

(see schematic, Fig

FO-1.1) or replace

composite light wire

Verify repair, go to

Step 7 of this Fault.

YES

4-202.22