I did the car alarm beep thingy, I used a radioshack siren for the beep. I'm getting tired of this annoying whistle....I was wondering if any of you guys used a different pezzo that offers a sound like that of a normal car alarm beep.

 

but a regular siren off a real alarm, hook up a relay to it(battery/ground) and run the relay switched lead off the relay from the rear tailight circuit.