Will Factory wiring and fuse handle Fiamm dual horns?

[Lee456]

I was out on the VMax today and blew the horn at some idiot that made a left in front of me. It sounds more like my car than my car does because I put Fiamm dual horns on it a month after I bought it. I've put them on any number of motorcycles and have always installed a relay and heavy wiring from the battery to avoid melting the horn button or factory wiring. If I install them in my Speed3 will I need to put in a relay and a heavier wiring, or can I safely hook them up to the factory wiring where the existing horn is?

 

[builthatch]

I was out on the VMax today and blew the horn at some idiot that made a left in front of me. It sounds more like my car than my car does because I put Fiamm dual horns on it a month after I bought it. I've put them on any number of motorcycles and have always installed a relay and heavy wiring from the battery to avoid melting the horn button or factory wiring. If I install them in my Speed3 will I need to put in a relay and a heavier wiring, or can I safely hook them up to the factory wiring where the existing horn is?

fiamm air horn, with a compressor? if so, no way.

if you are talking disc style or similar, i assume the stocker is not on a relay, and if they aren't, i can imagine that unless you totally laid on the horn for a long time, you should be ok running two in parallel.

if the draw was too much for the wiring, wouldn't it just pop the fuse anyway?

 

[Lee456]

Thanks. The horns I'm considering are Fiamm Freeway Blasters or something similar, not air horns.

My experience with changing horns is pretty much limited to motorcycles. It's not uncommon for people to put these horns on one, not use a relay, and burn out their horn button. You are absolutely right, the fuse should blow before that happens, but it doesn't always and the control assembly with the horn button isn't cheap. Some people get away with it, some don't. I've always played it safe and put in a relay but I'm lazy and I'd like to avoid that with the car if it isn't necessary.

 

[oaklandopen]

im sure this car has a relay for the horn, and is computer controlled. if it wasn't you wouldn't hear the beep when you push the lock button on the key fob twice.

if you run 2 horns in parallel the resistance of the circuit will go down, thus drawing more amperage, so the stock fuse might blow quicker/easier. in this case you may want to thicken the guage of wire, and beef up the fuse a little bit. it's always good to have a multimeter handy also

 

[icspots]

I've been running Fiamm Freeway Blasters since August of 2005 without a relay and they're fine. They're wired up in parallel on the stock wiring. The best way to install them is put one horn on the stock horn bracket (in place of the OEM one) then attach the second horn to the bracket it comes with, and attach that bracket to the bolt of the other horn on the OE bracket. Run the ground wires into the brackets and make a simple splitter for the hot wire.

 

[MikeHTally]

NEVER increase the size of a fuse beyond the manufacturer's specs. Let the existing horn circuit drive a relay with dedicated fuse (probably 25A). I put mine in that way. The relay is directly switching the hot side of the battery with the appropriate size fuse, with the original circuit providing the juice to supply the low-current side of the relay. I get the two-trumpet WOLO and the original squeeker together.