Rep Power: 184

I know that this topic has been discussed before.
I know that I am going with the Fiamm Freeway Blasters - Hi & Lo tones. I also have a 30 amp relay coming (used to be able to buy Fiamms in every auto parts store. Don't know what happened. So my favorite charity gets more donation via Amazon...).

My big question - where to tap into the fuse block for my high load power?
I have installed these horns on three different motorcycles, but their fuse blocks were not quite as sophisticated as our Civics. And I want to do a nice, clean job.
I'll take pictures.

This is something I have been putting off for a long time, but I drive for Lyft, and as the restrictions are being lifted on quarantine, it seems people have gotten much more reckless on the road. I want to let them know about my dissatisfaction.

Horns
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
https://smile.amazon.com/gp/product/B000DINKPQ/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1

Relay
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1

 
Rep Power: 244

I'd probably tap directly into the battery for that.

How much current do they actually draw?

 
Rep Power: 184

It looks like 6 amp, each.

From Amazon link:
Fiamm two terminal horn, 12 volt (max amp draw 6)

15 amp inline fuse?

 
Rep Power: 244

Oh 6 amps isn't bad. I thought it would be more then that. Yeah either an inline fuse (15A is probably good) or tap into the fuse box with a fuse tap. Not familiar with the fuse box but I'd use a 15 amp circuit that is not critical to the car operations. Like AUX power, sunroof, maybe even the radio.