check out these horns

[matthewai]

so i understand ill prob have to use the rely where exactly does it go? in the fuse box? do i have to switch it with a stock one or it just goes in on its own? thanks

[CTScott]

Originally Posted by matthewai

so i understand ill prob have to use the rely where exactly does it go? in the fuse box? do i have to switch it with a stock one or it just goes in on its own? thanks

I'll post some pictures in a little while, but I installed my Stebel horns last night. I used a smaller relay (one of the small blue Toyota ones). By using the smaller relay I was able to fit the relay and all of the wiring inside of the under dash fuse panel.

[coheed]

Originally Posted by JetfireK

You can buy HAND HELD AIR HORNS at any boating store. Might not be dandy in the rain...but they are LOUD...LOUD...LOUD...Maybe cost 10 dollars or less...Your passenger can hold it and blast as you go past.....

Those thing are quite compared to the one I've got on mine. Those are what 115-120dB's? The horn I have is measured at 135dB's at a foot away.

Originally Posted by sqcomp

Coheed...

Yeah baby! Now, stick those horns in the back bumper facing down to the ground for the best sound pressure distribution...
Of course the little camera mic doesn't do it justice...

No I got em mounted under the hood (see pics). There are still ridiculously loud in there. I can honk them in my driveway with the hood closed and it'll echo for about 2-3 seconds. I'll go out and grab a quick vid here in a sec and post it up.

Edit: Forgot to ask. Is that a Nathan P3 on the Avalanche?

[CTScott]

Now THOSE are horns!

Here's a video comparison of the OEM horn to my new Stebel horns:

http://www.youtube.com/watch?v=-Wmxu1mJezI


Here's how I wired it to keep everything neat within the under-hood fuse box:

Wiring - Fuse Box.jpg


I used a Toyota 90987-02027 or 90987-02012. This is a small SPST relay with 30A rated contacts. It is the same relay that is used for quite a few other functions in the Yaris, including the fog light relay.

Wiring - Relay.jpg

The coil of the relay gets connected to the horn wire (green wire in pin 1 of connector BA1) and ground (white wire with black stripe in pin 2 of connector CA1).

Wiring - Horn Wire.jpg

Wiring - Ground.jpg

One contact of the relay goes to a battery power feed (I used one of the unused fusible link positions) via an appropriately sized fuse (20A in my case). The other goes to the positive power feed of the horn(s). The negative terminal(s) of the horn(s) go to a chassis ground point (like the mounting bolt of the horn).

Wiring - Power and Fuse.jpg

Here are the horns mounted. It turns out that there is a second tapped mounting hole under the plastic bumper support that is above the stock horn:
Stebel Horns Mounted.jpg