bakit pa may switch?
bakit mo pa iibahin ang tunog pag bubusina ka?pag emergency, switch mo pa yung horn bago bumusina?

there were numerous requests sa shop namin dati na ganitong set up...but i really dont get the point of installing different types of horns tapos lalagyan ng switch para mag iba....

pero for the sake of answering, you need 2 relays..one for each set, then a switch.