autopage rs 655 horn, siren hook up

The siren requires a constant output, but the horn needs a pulsed output (for the 'honk honk' instead of continuous sound.)I'm not a professional installer. But I did stay at a Holiday Inn Express.

What you need to do is hook up your siren as it should be.  Then take a tap or splice into the positive wire feeding your siren and install that lead onto a flasher that you would use for your turning signals which you can buy at pep boys, autozone, or any automotive supply store.  Take the other terminal from the flasher and run that to the positive coil on a 12 volt relay.  Ground the negative coil side of the relay to chasis.  Next, ground your common side of the relay, and hook up your normally open contact to the (-) output to your horn honk relay where ever that might be located in  your car.  So every time your alarm goes off, your siren will go off, and the signal you feed the flasher will pulse the relay and make your horn honk every second or two.