REAR SIDE MARKER LIGHT(S) DO NOT OPERATE. -725550348

TM 9-2330-385-14

4-14. 12-VOLT ELECTRICAL SYSTEM TROUBLESHOOTING PROCEDURES (CONT).

2. REAR SIDE MARKER LIGHT(S) DO NOT OPERATE.

INITIAL SETUP

Tools and Special Tools

References

Tool Kit, General Mechanic's: Automotive

TM 9-2320-364-10

Equipment Condition

Multimeter (Item 28, Appendix J)

Engine OFF, (TM 9-2320-364-10)

Wheels chocked, (TM 9-2320-364-10)

Personnel Required

12 vdc cable assembly connected to

Two

Parking brake applied, (TM 9-2320-364-10)

NOTE

The following troubleshooting procedures cover the left rear side marker light, but they apply to both rear side marker

lights.

All electrical wires and components listed in this troubleshooting procedure are illustrated and located in FO-1.

START

KNOWN INFO

TEST OPTIONS

WARNING

Read WARNING

Continuity test.

Truck electrical system OK.

on Page 4-133

All other trailer lights operate.

REASON FOR QUESTION

POSSIBLE PROBLEMS

Is continuity measured across

If lamp filament is faulty, light

will not operate.

rear side marker light lamp?

Light lamp faulty.

Marker light faulty.

Wire 1012-26 faulty.

Replace light lamp

Verify repair, go to

Step 6 of this Fault.

YES

4-132