My Barth has a set of air horns up top but I cannot find a switch for them anywhere and the horn on the steering wheel only blows the regular horn. I just wondered if it originally had it own switch or if the horn on the steering wheel should activate them.

Thanks in advance for any info.

On my coach the air horns were wired from the regular horn switch to a solenoid type valve in the air horn line. They did not work since the vacuum powered air compressor did not work.

When I reconnected the horns to my air compressor system and got the pressure up, the air horns work.

Thank you. I am going to try to trace it out.

I have exactly the same question so let us know how you fix this. Regular horn works but not the ones on top.

I will see what I can figure out tomorrow and update then.

My air horns work sometimes but most of the time not. There must be a solenoid or relay somewhere in the system. I've had my Barth about 10 yrs now and have never been able to find a solution to this problem. It's a great mystery.

on http://www.airforums.com/forum...nt-working-1286.html

there is this posting:

...the system is easier to troubleshoot, when you understand the components.
There is--
the horns
the pressure line to the tank
the tank
the compressor
the pressure regulator (which turns the compressor
off when a certain pressure is reached)
and a pressure relief switch

When you push on your horn button, the pressure relief switch opens and blows your airhorns.

That is assuming that there is pressure in the tank.

First thing I would do, is find the tank and look at the bottom for a moisture drain plug or screw.

Let all the pressure out of the tank, close the plug and have someone turn the ignition on. The compressor should come on fill the tank and shut off.

If this checks out ok, find the pressure relief valve (it should be inline between the tank and the air horns and has one or two wires running to it.
You could safely remove the airhose from the AIRHORN SIDE of the switch and have someone push the horn button while you watch for air pressure coming out of the switch.

If this checks out ok, you can use an air blow nozzle attached to an aircompressor set at 100PSI and stick it on the end of the detached hose.

If this does not honk your horns, you know what to replace.