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TM 9-2320-364-20-2
2-1204
7. INSTRUMENT LIGHTS DO NOT OPERATE.
INITIAL SETUP
1.
Repair wire 1276 (see
schematic Fig 2-28)
or notify DS
Maintenance.
Verify repair, go to
Step 3 of this Fault.
START
YES
NO
Instruments operate, indicating
10 to 14 vdc are present at
wires 1276 splice to rheostat.
Wire 1276 faulty.
Thumbwheel rheostat switch
faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If wire 1276 is faulty, lamp will
not light.
2-20. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
STE/ICE-R (optional) (Item 3, Appendix G)
Multimeter (Item 44, Appendix G)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
Are 10 to 14 vdc measured on
wire 1276 at thumbwheel
rheostat switch?
WARNING
Read WARNING
on Page 2-1205
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