TMaas said:
There are two more things that i'm still unsure about. Wiring the solenoid (air valve) into the system to be able to use the factory horn power and a splitter switch to switch between the factory and the air horns (how does the relay tie in and what does it do?), and how to control the amount of air the compressor puts out. Another thing, what can a guy use for brackets to hold the tank on? Is it all custom made?
Thanks again everyone!
-Trever
Trever... I suppose you could use a SPDT two way switch to select either the OEM horn or the air horn. The way I see this is that you would cut the 12V wire going to the horn. Then you would route that wire (from the truck steering wheel horn) back to the SPDT (Single Pole Double Throw) switch and put it on the center pole. Then you would route a wire from either the top or bottom pole of the SPDT switch, back to the OEM horn. The other pole, on the SPDT would be routed to the air horn solenoid. Throwing the switch one way would power the OEM horn, the other way would power the air horn.
You control the amount of air in the tank using a pressure solenoid. I'd look for one with a range of around 80-120psi (on at 80... off at 120). You don't need to regulate the air to the horn. In fact, for a big horn, or multi horn you want both pressure and volume (with volume being more important). That's why I recommend a horn solenoid that has a 3/8" fitting that is straight through. It will give you plenty of air to the horn.
The brackets are mostly custom made. I have a brother that is a professional welder and he welded a bracket to the tank I got from Harbor Freight. This take is mounted under the bed (passenger side) using the bed cross members as the attach point. You will have to just figure this one out.
The air pump is mounted under the rear passenger floorboard at the side wall. This area is double walled, so you can use some self drilling machine screws to mount it there.
The air pressure and air horn solenoids are mounted on the air hose, in series, with the horn solenoid screwed into the sidewall.
The air Horn (24") is mounted forward of the solenoids (just under the front passenger floorboard) on the same sidewall (under the rocker panels). These rocker panels are an excellent place to run wires back from the dash area. You can drill a hold in them and run the wires down through them. If you look under your truck (at least on the 3rd gens) you will see some black tape over several holes in the rocker panel. Any one of these can be pulled for access to the panel.
I will try to get some pictures of this, but I can't promise when I will get around to it.
I'm sure there are a million ways to do this project, but that's how I did it...
