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Page Title:
FRONT SIDE MARKER LIGHT DOES NOT OPERATE. |
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 TM 9-2330-385-14
4-14. 12-VOLT ELECTRICAL SYSTEM TROUBLESHOOTING PROCEDURES (CONT).
1. FRONT SIDE MARKER LIGHT DOES 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)
Wheels chocked, (TM 9-2320-364-10)
Personnel Required
12 vdc cable assembly connected to
Two
truck, (Para 2-9)
NOTE
The following troubleshooting procedures cover the left front side marker light, but they apply to both front side marker
D
lights.
All electrical wires and components listed in this troubleshooting procedure are illustrated and located in FO-1.
D
START
1.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Continuity test.
Truck electrical system OK.
on Page 4-123
All other trailer lights operate.
REASON FOR QUESTION
POSSIBLE PROBLEMS
Is continuity measured across
If lamp filament is faulty, light
will not operate.
front side marker light lamp?
Light lamp faulty.
Marker light faulty.
Wire 1012-24 faulty.
Wire 1435-23 faulty.
Replace light lamp
NO
Verify repair, go to
Step 7 of this Fault.
YES
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