Astro Spectra W3 Siren Issues

[dasuriano]

Hooked up a siren box in a friend's car yesterday. Could only get the airhorn to work. We went through all the siren options to see if any of them would work, but the name would only appear on the screen with no sound. We only did the siren box and the cabling. Does this set-up require a DEK or some other accessory to get it to work?

[jmr061]

Need to program a button as SIREN to turn on and off the siren.

Jason

[dasuriano]

Thank you. Not sure how I missed that the first time.