Air Horns
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Freshman User
Joined: Mar 2004
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Air Horns
Hey guys, I just bought a set of air horns for my truck today, and was curious how you guys have wired them. I did a search for this topic and found out that I probably shouldn't wire the compresser to the existing horn wires. I want the compresser to run off of the battery but I also want to use the horn button inside the steering wheel. Any suggestions on how I should wire this up? Oh and is there any way other than taking the inner fender moulding out to get to the factory horn. Thanks again. 
Senior User
Joined: Dec 2003
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From: Washington, Kansas
I would use the original wires hooked to a relay and from the relay make it to were it crosses over to the battery, because I don't think that the original wires can handle that much of a load for very long before burning up or blowing fuses.
refuse2
refuse2
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these are actucally cheap plastic air horns from a truck stop, 40 bucks. I hope they work well and I'll let ya know how they turn out. Thanks for the wiring info, that's just what I needed. I just moved to college and the traffic is terrible, and I like to get people to move when there stopped at a green light. Thanks
Senior User
Joined: Aug 2003
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From: Scottsdale, AZ
yes relay is the way to do it. what does your compressor say for current draw? I would just wire into the horn switch under the dash near the fuse panel. I think the wire you are looking for is a dark blue and is a negative activated wire in the steering column harness. Don't forget to unhook your existing horns!! Lets HEAR how they turn out!! 
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Joined: Aug 2004
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I just finished mounting a Grover 27 inch stutter horn (actual fire truck horn) with a one gallon tank and compressor on my 05 F350. I mounted the horn under the truck below the drive's door area and the tank and compressor on the frame rail. I wired the compressor to the orange wire that is part of the trailer wiring. I installed an inline 15 amp fuse. I actually tied the wiring for the horn button to the same wire. I located the button on the drivers kick panel. It is activated by my foot.
I was concerned about having the airhorn sound when I locked my doors.
I was concerned about having the airhorn sound when I locked my doors.
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It cost about 40 bucks, I rigged them up tonight. I don't have a air tank, just an electric compresser. I was actucally not very impressed with the sound, It's loud but almost like one of them air can horns. They will work for now but if I come across some from a Peterbilt I will be getting them put on. Thanks for the help guys.
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Joined: Aug 2004
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I tried air horns many years ago. The problem arose from mounting the horns in the engine compartment. The hood, radiator, grill etc. really muffled the sound. They were loud, but not as loud as they could/should have been.
Another horn I tried later, was the horn used on a diesel locomotive. As with the air horn, mounting in the engine compartment it wasn't as loud as it could/should have been, but it sure was an interesting sound!
Another horn I tried later, was the horn used on a diesel locomotive. As with the air horn, mounting in the engine compartment it wasn't as loud as it could/should have been, but it sure was an interesting sound!
Last edited by JFWalker; Oct 5, 2004 at 05:26 PM.
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Joined: May 2002
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From: Robbinsville NJ
Originally Posted by JFWalker
I tried air horns many years ago. The problem arose from mounting the horns in the engine compartment. The hood, radiator, grill etc. really muffled the sound. They were loud, but not as loud as they could/should have been.
Another horn I tried later, was the horn used on a diesel locomotive. As with the air horn, mounting in the engine compartment it wasn't as loud as it could/should have been, but it sure was an interesting sound!
Another horn I tried later, was the horn used on a diesel locomotive. As with the air horn, mounting in the engine compartment it wasn't as loud as it could/should have been, but it sure was an interesting sound!
You could always mount them under the cab
Hotshot
Joined: Apr 2004
Posts: 13,589
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From: NW burbs of chicago
where did you get a 1 gallon tank?
Originally Posted by jyddad
I just finished mounting a Grover 27 inch stutter horn (actual fire truck horn) with a one gallon tank and compressor on my 05 F350. I mounted the horn under the truck below the drive's door area and the tank and compressor on the frame rail. I wired the compressor to the orange wire that is part of the trailer wiring. I installed an inline 15 amp fuse. I actually tied the wiring for the horn button to the same wire. I located the button on the drivers kick panel. It is activated by my foot.
I was concerned about having the airhorn sound when I locked my doors.
I was concerned about having the airhorn sound when I locked my doors.