[Soichiro Jr.]

Hello. I have some questions. What would happen, if I replaced a 15amp fuse with a 20amp fuse in the oem underhood fusebox????

I'm asking, because I just bought a new horn(air) to put on my car('07 Si), but I've read that it(airhorn) blows the fuse in some Civics(some don't). This is what I've found out searching the web- the Wolo Badboy 419(my new horn) draws 12-12.5amps when first pushed(honked) then steadies off between 6-8amps while being continually pressed..... The horn fuse in my Si is shared with the stop lights and is 15amps. I've heard that the stop lights draw 5amps. That means that if I would step on the brakes and honk the horn(Wolo airhorn), the 15amp fuse protected horn/stop light circuit would experience a peak of 17-17.5amps blowing the 15amp fuse, correct? That is why I'm wondering about replacing the 15amp horn/stop fuse with a 20amp. Is there any way that a 20amp fuse would hurt the horn/stop light wiring? Could it hurt any other wiring or the fusebox????

I guess my other option would be to place a 12amp inline fuse between the airhorn and fusebox, right or no? Also, if I used 18 gauge instead of 16 gauge wire for the install, would that affect the amp draw on the electrical system? I've read of someone installing a horn using 18g wire, then replacing it with 16g wire and the horn sounded louder. Any real input would be greatly appreciated. Thank you very much. PEACE OUT!