AUXILIARY LIGHT BAR MARKER LIGHTS AND TAILLIGHTS DO NOT OPERATE (S/N YB6122 075 AND UP).

TM 9-2330-385-14

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

22. AUXILIARY LIGHT BAR MARKER LIGHTS AND TAILLIGHTS DO NOT OPERATE

(S/N YB6122 075 AND UP).

INITIAL SETUP

Tools and Special Tools

References

Tool Kit, General Mechanic's: Automotive

TM 9-2320-364-10

(Item 50, Appendix J)

Multimeter (Item 28, Appendix J)

Equipment Condition

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

Personnel Required

24 vdc cable connected to truck, (Para 2-9)

Two

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

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

NOTE

The following troubleshooting procedures need to be performed if extended drawbar/light bar kit has been

installed.

All electrical wires and components listed in this troubleshooting procedure are illustrated and located in FO-1.1.

START

TEST OPTIONS

KNOWN INFO

WARNING

Read WARNING

Voltage test.

Truck electrical system OK.

on Page 4-69

All other trailer lights operate.

REASON FOR QUESTION

POSSIBLE PROBLEMS

Are 22 to 28 vdc measured

If 22 to 28 vdc are not present at

between terminals E and D

auxiliary light bar 24 vdc cable,

Auxiliary light bar 24 vdc

on rear crossbrace end of

lights will not operate.

cable faulty.

auxiliary light bar 24 vdc

cable?

Replace auxiliary light

bar 24 vdc cable,

(Para 5-24).

Verify repair, go to

Step 2 of this Fault.

YES

4-118.68