horn blows for until tank is empty. Help!

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1

I dont want to ever have to go back to that place that installed my horns again so if I can fix it on my own then Ill be better off. Besides the installation looking like a drunk 9 year old put it together, whenever I push the horn button the horns blow until the pressure is gone in the tank.I have a 5 gallon tank that originally had a 200 psi pressure switch which they changed to a 145. There is what looks like 1/4" tubing from tank to valve. The valve appears to be from HB, has a blue info tag on top with HB logo and is rated for 150-210. It is a 1/2" which they have stepped down to the 1/4" on the inlet and then the 1/2" manifold is attached to the other side with 5/16" or 1/2" tubing going to the horns. They told me they tried two different valves and it does the same thing. I even took the valve apart to see if it was clogged with something but it is clean. I have a chrome valve from a previous kit that just has 12V on top of it and it works fine. The only problem is that it is 1/4" and wont fit the manifold. Is it the valve or do i need a relay before the valve coming from the stock horn? Please help

This is the valve I have: http://www.hornblasters.com/products/details.php?i=hornblasters-diablo-1-2-in-brass-air-valve

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It’s weird that 2 valves would do the same thing.
Maybe both installed the wrong direction? The arrow points with the flow - towards the horns.

You shouldn’t need a relay since the valve draws very little power. Are you sure when you let go of your button that it actually stops power to the valve? (test light or multimeter)

1/2" airline between the tank and valve is preferred for loudness.

3

Sounds like a faulty valve. If it came from the same line as the other it may have been a bad run of valves. Happened to me with my kit except it would stop after 10 seconds or so afyer releasing the horn button. HB replaced it without a problem and quickly too.

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4

Thanks for the replies. I have the valve in the correct direction so it’s not that. I didn’t think about both valves being from the same batch. I called HB this morning and they told me to take it back to the installer. I really do not want to do that. After that I tried grounding the valve to the frame and ran a line straight to the battery… Still does the same thing. I’m thinking now it must be a faulty valve. Could running a 1/4 " line to the 1/2" valve have anything to do with it?

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No, the valve doesn’t care about the airline size.

6

Just stopped by HB’s and got a new valve. Hopefully it will fix the problem

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make sure the valve is rated for the right pressure. the new smc valves are only rated for 127 psi and they will stick open until pressure is released

8

Got it to work. I lubed up the diaphragm and its working great now. Wd40 didn’t do the trick so I used some silicone and that did the trick. I guess I’ll just keep the new valve I bought for a rainy day. Thanks guys for the input.