TAILLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP). (Cont) -725550282

TM 9-2330-385-14

15. TAILLIGHT DOES NOT OPERATE (S/N YB6122 075 AND UP) (CONT).

KNOWN INFO

WARNING

TEST OPTIONS

Read WARNING

Truck electrical system OK.

on Page 118.23

Voltage test.

All other lights on trailer

operate.

Wire 1435 OK.

REASON FOR QUESTION

Are 22 to 28 vdc measured on

If 22 to 28 vdc are present on

wire 1008B/21 at LED com-

wire 1008B/21, LED composite

posite light?

light is faulty.

POSSIBLE PROBLEMS

LED composite light faulty.

Wire 1008B/21 faulty.

Wire 1008B faulty.

Go to Step 3 of this

Wire 1008C faulty.

Fault.

Diode assembly faulty.

YES

Replace LED com-

posite light (Para

4-29). Verify repair,

go to Step 6 of this

Fault.

4-118.22