4-13. 24-VOLT ELECTRICAL SYSTEM TROUBLESHOOTING (CONT).
11. AUXILIARY LIGHT BAR MARKER LIGHTS AND TAILLIGHTS DO NOT OPERATE.
Tools and Special Tools
Tool Kit, General Mechanic's: Automotive
(Item 50, Appendix J)
Multimeter (Item 28, Appendix J)
Engine OFF, (TM 9-2320-364-10)
24 vdc cable connected to truck, (Para 2-9)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
The following troubleshooting procedures need to be performed if extended drawbar/light bar kit has been
All electrical wires and components listed in this troubleshooting procedure are illustrated and located in FO-1.
Truck electrical system OK.
on Page 4-117
All other tracter lights operate.
REASON FOR QUESTION
If 22 to 28 vdc are not present at
Are 22 to 28 vdc measured at
auxiliary light bar 24 vdc cable
Auxiliary light bar 24 vdc
terminal E and D on rear
terminal E, lights will not
crossbrace end of 24 vdc
Replace auxiliary light
bar 24 vdc cable,
Verify repair, go to
Step 2 of this Fault.