REAR SIDE MARKER LIGHT(S) DO NOT OPERATE. -725550162

TM 9-2330-385-14

4-13. 24 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

(Item 50, Appendix J)

Equipment Condition

Multimeter (Item 28, Appendix J)

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

24 vdc cable assembly connected to truck,

Personnel Required

Two

(Para 2-9)

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

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

NOTE

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

Truck electrical system OK.

Visual inspection.

Does at least one rear side

All other trailer lights operate.

marker light operate?

REASON FOR QUESTION

POSSIBLE PROBLEMS

If no rear side marker lights

Rear junction box faulty.

operate when power is applied,

Light lamp faulty.

fault is rear junction box. If only

Rear side marker light faulty.

one rear side marker light

Wire 1012-26 faulty.

operates, fault is wire 1012-26

through rear side marker light.

Replace rear junction

box assembly

(Para 4-26).

Verify repair, go to

Step 7 of this Fault.

YES

4-34