REAR SIDE MARKER LIGHTS, REAR MARKER LIGHTS AND TAILLIGHTS DO NOT OPERATE

TM 9-2330-385-14

4-13. 24 VOLT ELECTRICAL SYSTEM TROUBLESHOOTING PROCEDURES (CONT).

9. REAR SIDE MARKER LIGHTS, REAR MARKER LIGHTS AND TAILLIGHTS 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,

Materials/Parts

(Para 2-9)

Locknut (Item 31, Appendix I)

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

Personnel Required

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

Two

NOTE

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

Voltage test.

Truck electrical system OK.

on Page 4-103

All other trailer lights operate.

REASON FOR QUESTION

POSSIBLE PROBLEMS

If voltage is not measured on

Are 22 to 28 vdc measured on

front junction box assembly,

Front junction box assembly

front junction box assembly

power is not supplied to lights

faulty.

at terminal 21?

and rear side marker light, rear

Wire 1008C-21 faulty.

marker lights, and taillights will

Rear junction box assembly

not operate.

faulty.

Replace front junction

assembly (Para 4-25).

Verify repair, go to

Step 4 of this Fault.

YES

4-102