turn signal flash to constant for siren

I have a scorpio alarm on a motorcycle. It is a self contained box, that has two outputs to the rear turnsignals. When the alarm is activated it flashes the turn signals. I am wondering how to use those outputs to make a steady signal to wire in a second siren. I found the diagram on this site for turning lights, but I cant find a 10K uf Capacitor, or a 10K resistor. Do I need a capacitor that big, or is that only for the current draw of the lights? Also I don't really care if the light flashes anymore, just that it activates the siren. I'm kinda a noob to circut making so if you could point me in a direction or part number for radioshack stuff that would be even better! - Thanks - Shawn This is the diagram I found here: https://www.the12volt.com/relays/page5.asp#pts