Yellow all, within the last I month put an air horn on the ride, sounds cool as hell when you lay on it. Problem is after some use I seem to blow the fuse. The air compressor is powered by the same power wires running the original horns and the two air horns are mounted in the original positions of the factory horns, ***** to get in but nice and clean. I upped the fuse from the factory 10 amp to a 15 amp one but still seem to blow the fuse. Does anyone know if I should jump up to a 20 amp, I can't imagine going all the way to a 25 is necessary. Input is always appreciated.

 

Your new air horn was installed incorrectly. Don't go to a 20- or 25-amp fuse, lest you melt your wiring! The new horns draw more current than the stockers, so you have to install them with a new thick power wire and a new auxiliary horn relay. Install that new power wire with an in-line fuse of appropriate rating. The wire which formerly powered the factory horns will now be the signal wire to the auxiliary horn relay.

Good quality aftermarket horns come with a new relay in the box. Did your air horns come with a relay? Did you just toss it?

 

Thanks Daniel, yes it did come with a relay but I thought I could get away with using the existing wiring since that was one of the options in the instructions. So your saying use the original wiring from the horn to send the signal to the relay and run a power wire to the relay to power the horns with an inline fuse attached. Should I power the horn right off the battery? Thanks man.

 

Yes.

You could do it that way. If you want a "clean" installation, like the factory would do it...
1) Raise the hood.
2) Remove the plastic cover from the narrow link-and-fuse box adjacent to the battery.
3) Choose an unused "slot" among the fusible links. It should have a "hot always" male spade terminal and a vacant terminal slot right next to it. My Maxima has several of these.
4) Fashion a thick power wire with a male spade lug crimped or soldered to one end.
5) Insert that male spade terminal (from below) into the vacant terminal slot you chose in the link-and-fuse box.
6) Run the power wire to the power terminal of the auxiliary horn relay. That relay may be mounted in any convenient location. I'd put it close to the air horn compressor.
7) Connect the original horn power wire to the signal terminal on the auxiliary horn relay.
8) Connect the auxiliary horn relay load terminal to the air horn compressor with some of the same thick wire.
9) If the compressor does not find ground through its case, run a wire from the compressor ground terminal to a clean body or engine ground. Use some of the same thick wire.
10) Plug a newly-purchased 30 amp fusible link into the link-and-fuse box, at the formerly-unused slot. Mark the map on the plastic box cover HORN. Snap the box cover in place.
11) Close the hood.
12) Blow the horn.

 

Thank you sir, sounds pretty easy the way you described it. I appreciate it.

 

Yep, do what Daniel suggest or you can run the hotwire to the battery. I ran it to the battery but seeing what Daniel just descriped. That way is much cleaner and I'm going to start running my power wires off those vacant fuses.