Air Horn Auto On :(

[DUG]

I picked up a used Kenworth air horn cheap off of eBay (really used - still had a chunk of fiberglass attached). I also picked up a new 12/24 volt solenoid to run the horn. I put it in the cab at the end of a t fitting under the dash on the right side. Then I mounted the horn on the right side inner fender well and plumbed copper line to it. A quick call to DH and I found a spot to tap into some electricity. The test went well, the truck had about 50 psi in it and the horn was pretty loud. I wanted to see if the horn was louder than the truck so I fired her up and tried again. It got even louder, BUT the thing won't shut off after 60 PSI. I need an American made, non eBay solenoid. Can any recommend a good one or a place to find one? I should have known better than trying to go cheap. My truck runs with 90-100 psi so it will have to be able to hold that.

 

[gimpyrobb]

Why not use the original(deuce) solenoid?

 

[rat4spd]

Since my phone isn't working, make sure you have the solenoid installed in the right direction.

 

[DUG]

Deuces came with air horns? What solenoid?

The solenoid I bought has an arrow pointing the direction of flow and seems to only go in one way anyways.

 

[FreightTrain]

your switch ain't welding it's contacts closed is it?I had a Ford F150 that would do that with teh starter Solinoid.A solinoid shouldn't stick due to pressure since the electricity goes through a coil and creates a magnetic field pulling a metal slug with a rubber face back against a spring and away from the outlet letting air through.When power is shut off the air pressure and spring shove it back over the hole.

 

[DUG]

The spring isn't strong enough to close it cuz it's cheap overseas crap.

 

[FreightTrain]

You and wreckerman shop in the same place now?

 

[rat4spd]

The spring isn't strong enough to close it cuz it's cheap overseas crap.

I'll check, I may have a used 24VDC coil. If I do, I'm sure I have a used valve I can send you. ASCO, DEMA among others make valves that will work, but they usually cost about $50 or so.

What size are you using, 1/4" ?