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Old 11-02-2012, 09:09 AM   #1
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Hadley air horn problem

I have twin Hadley air horns on a 2003 Winnebago Ultimate Freedom diesel pusher. I am getting only one horn tone instead of the normal two tones, so I assume that one of the horns is not operating. I also assume that the chassis (Spartan) air supply feeds the horns so there is no separate compressor in the system. Does anyone have any ideas about where I should start to troubleshoot this problem?

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Old 11-02-2012, 09:36 AM   #2
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Air horns are simple. A tank and a compressor, solenoids to let the air flow to the horn and the horn itself. If you are sure of your air supply and the psi, then check the solenoid, typically they are about the size of a 35mm film cannister (if you remember those) and they will have wires to them; they are electric and will be either close to the air source or close to the horn typically. Do they open when you hit the horn button? If so then does the air flow to the horn?, if so then your horn needs to be cleaned or the diaphram replaced or both. Hadley sells kits for this, and I have heard of folks using other thin metal material to make the diaphram. Most of these repairs are simple;if you can reach the component a bad solenoid needs to be replaced, they are about 20 to 40 bucks each. The horn repair kit is about 25 bucks I think.

IF it were me I would do both as long as I was messing around with this.

I do all my own stunts
03 Dolphin LX 6355, Workhorse W22, 8.1 vortec, 04 CR-V, Blue Ox, Brake Pro----Norm, Barb and
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Old 11-26-2012, 07:29 PM   #3
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Kent, I had a similar problem with the Hadley Bully twin air horns on our coach where only one would sound.

I found the one that wouldn't work took a long thin flex grabber tool inserted it in the horn and pulled some dirt & debris out tried it again and it worked. Not sure if that's your problem, buti f you're getting air to where the one will sound your horn air valve is working.

Good luck and let us know the fix...
Jim & SherrySeward

2000 Residency 3790 v10 w/tags 5 Star tune & Banks system Suzuki XL7 toad
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