2018 PIU Steering wheel horn to siren box or siren horn

[MIPSYOP]

I’m wondering if there is a way to connect my factory steering wheel horn to my siren system pictured here or if I connect it to my 200w speaker mounted on the front of my 2018 PIU? Looking to get that deep police horn sound instead of the factory one? Is there a wire in the harness for the siren box that connects to the steering wheel factory horn wire? Also, would the siren box need to be powered up for this to work?

 

[syncceduppp]

Yes, this is the whole point of the horn ring circuit that Ford makes available on the PIs. Reference the upfitter guide to find and use it.

https://www.fordservicecontent.com/ford_content/catalog/motorcraft/2018-Sedan-And-Utility-Modifier-Guide.pdf