STOPLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP). (Cont) -725550466

TM 9-2330-385-14

15. STOPLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP) (CONT).

KNOWN INFO

TEST OPTIONS

WARNING

Read WARNING

Continuity test test.

Truck electrical system OK.

on Page 4-202.41

All other trailer lights operate.

Taillights operate, indicating

REASON FOR QUESTION

LED composite light ground

(wire 1435) OK.

Is continuity measured across

If wire 1003C or diode assem-

LED composite light OK.

wire 1003C between diode

bly is faulty, voltage is not sup-

12 vdc cable assembly OK.

plied to stoplight.

assembly connector, terminal

Wire 1003-5 OK.

1 and rear junction box?

Wire 1003C/22 OK.

POSSIBLE PROBLEMS

Repair wire 1003C

(see schematic, Fig

Wire 1003C faulty.

FO-1.1) or replace

Diode assembly faulty.

trailer main wire

Verify repair, go to

Step 6

of this Fault.

YES

Replace diode

assembly

repair, go to Step 6 of

this Fault.

4-202.40