PIAA Euro Sports Horn Installation (w/ Plug & Play Harness Relay Kit) on a 2020 Honda Civic RS Turbo 

You still need the relay for your aftermarket horn to get nice tone..

You can search for “horn harness relay kit” for honda civic fc 2016-2021

Just one connection only..

@@k4alzar766 thanks. So i can still use the other socket to add another set?

@@kurttevan yes you can add another set..

Harness and adpater are usually use to avoid cutting the original wires to connect the aftermarket horn and to keep, not voiding the car’s warranty...

@@k4alzar766 so if I only use the adapter for the connector so I don't cut the original wires I should still be fine? As in if I get the adapter wire and plug that to the horn and then I goahead and plug the original plug from the car to that wire there should be no issue?

@@maurjul if you will install aftermarket horn, you need horn relay to give more power that requires your aftermarket horn..that’s why you need the harness with relay or you can cut the original wire and install the horn relay..if you going to direct only the adpater w/o relay, your aftermarket horn will not reach the maximum decibels or loudness and your horn fuse will always get busted..

@@k4alzar766 oh. I understand. Thanks a lot.