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TM 9-2320-364-20-3
2-2222
6. AIR HORN WILL NOT OPERATE.
INITIAL SETUP
1.
Does air horn valve operate
properly?
START
YES
NO
Air system OK.
Windshield washer
working indicating air
pressure present at four
position solenoid valve.
Air horn valve is faulty.
Air hose and/or fittings are faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
If air horn valve fails to operate, air
horn valve is faulty.
2-27. AIR SYSTEM TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
Goggles, Industrial (Item 30, Appendix G)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brakes applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
Air system charged, (TM 9-2320-364-10)
References
TM 9-2320-364-10
WARNING
Replace air horn valve
(Para 19-11). Verify
repair, go to Step 3
of this Fault.
Materials/Parts
Solution, Soap (Item 86, Appendix C)
NOTE
Soap and water solution will be used to visually check for leaks.
Read WARNING
on Page 2-2223
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