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TAILLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP). (Cont) -725550291
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TM-9-2330-385-14 Palletized Load System Trailer (PLST) Model M1076 Manual
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STOPLIGHT(S) DO NOT OPERATE (S/N YB6122 075 AND UP). (Cont) -725550293
TM 9-2330-385-14
4-13. 24 VOLT ELECTRICAL SYSTEM TROUBLESHOOTING PROCEDURES (CONT).
16. STOPLIGHT(S) 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)
Equipment Condition
Multimeter (Item 28, Appendix J)
Engine OFF, (TM 9-2320-364-10)
Truck air pressure charged, (TM 9-2320-364-10)
Personnel Required
24 vdc cable assembly connected to truck,
Two
Wheels chocked, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
NOTE
The following troubleshooting procedures cover the left stoplight, but they apply to both stoplights.
D
All electrical wires and components listed in this troubleshooting procedure are illustrated and located in FO-1.1.
D
START
1.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Truck electrical system OK.
Voltage test.
All other lights on trailer
operate.
REASON FOR QUESTION
Tailight's operate indicating
Are 22 to 28 vdc measured on
LED composite light ground
If 22 to 28 vdc are present on
(wire 1435) OK.
wire 1003C/22 at LED
wire 1003C/22 LED composite
composite light?
light is faulty.
POSSIBLE PROBLEMS
LED composite light faulty.
24 vdc cable faulty.
Wire 1003C faulty.
Wire 1003C/22 faulty.
Go to Step 2 of this
NO
Fault.
YES
Replace LED com-
posite light (Para
4-29). Verify repair,
go to Step 4 of this
Fault.

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