6. AIR HORN WILL NOT OPERATE.
Does air horn valve operate
Air system OK.
working indicating air
pressure present at four
position solenoid valve.
Air horn valve is faulty.
Air hose and/or fittings are faulty.
REASON FOR QUESTION
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 Mechanics: Automotive
(Item 74, Appendix G)
Goggles, Industrial (Item 30, Appendix G)
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)
Replace air horn valve
(Para 19-11). Verify
repair, go to Step 3
of this Fault.
Solution, Soap (Item 86, Appendix C)
Soap and water solution will be used to visually check for leaks.
on Page 2-2223