Here is a quick DIY for installing the air horns. This mainly deals with the wiring. You have to get creative to install the horns themselves.

1. The ground, its very simple to locate the ground, its on the passenger's side apron right behind the healights in the engine bay, you will see a bunch of black wires grounded there, and this is where you will ground the compressor.



You take the wire from the ground location to the compressor to its negative terminal, then you take the wire from the compressor's positive terminal to the ground input on the relay. See below.

2. The relay takes 4 wires, one ground, one power, one to the horn switch in the fuse box and the one wire that is left, goes is into the power wire (like if your bridging it).



here is a basic diagram to help you wire it.



If looking at the relay as described in the picture, (Notice the back of the relay with the mounting lip), the top male connector gets wired to the power in the fuse box (see below), the right one gets wired into the top one. The bottom is the ground, and you ground it to the ground point shown above, and the left one is for a wire going to the horn switch in the fuse box (see below).


3. Power- run a wire from the relay to the fuse box, you will find it directly in front of the battery in the engine bay, pull the cover off. In the pictures below, the yellow wire is the power, if looking at the fuse box from the front of the car, you will see it directly to the right of the black box. I dont remember if there was a fuse in there or not, but this is a direct 12 volt power source.

Also the right position in the relay needs to be wired up to the power position which is the one on top. Just run a wire from one to the other, like your bridging it, see the hand drawn diagram above.


From the front of car.
From the side of car.

4. Horn switch, here you will run the wire from the relay to the horn switch in the fuse box. You can see clearly here in the picture, at the top left corner of the fuse box (looking from the front of the car), there are three relays, pull the right one out, and there yuo will find 4 inputs, put the wire in the top left one. I used a quick diconnect male and cut it down to size to make it fit.



5. Your all done at this point with the wiring. Tuck the relay and wires neatly in the fuse box and put the cover back on. Route the ground wire thru the front of the fuse box out to the compressor. Mounting the air horns from here is your personal preferance, if the compressor is small you can mount it on the stock horn location, you will see what I mean when you have it in front of you.

As for the horns, get creative, I used a piece of aluminum about 6 inches in length, which had 3 holes, ( one for each horn and one to mount it to the car), then I mounted the piece of aluminum to the location where the stock air box mounts, and then mounted the air horns to the other two holes, then I mounted the compressor underneath. As you can see in the pictures.