Added horn, now blowing the fuse

[qrk]

I wasn't satisfied with the sound level from the factory horn on my 2018 Sierra 1500, so I bought a Wolo Big Bad Max.  I wired it in parallel to the high note factory horn, splitting it off the normal connector behind the low note horn.  I suspect but haven't proved that the factory horns are wired parallel to start, so in theory all three should be in parallel now.  I tested it several times and it seemed to be working fine for a few days, but this morning came out to find the fuse was blown.  The wiring all looks ok.  I switched out the fuse and it worked again.  Is it just overdrawing with a third horn on the circuit?  

[austingta]

Horns are high draw. Add a relay. 

 

https://www.amazon.com/Absolute-RLS125-12-VCD-Automotive-Relay/dp/B0002KR9GG/ref=sr_1_5?ie=UTF8&qid=1529506237&sr=8-5&keywords=12v++relay

[qrk]

I was hoping not to have to rewire the entire system back to the fuse box or add a second switch.  Is the factory wiring going to be able to handle that?  Just makes me concerned that if it's blowing the fuse and I bypass it, could it cause bigger problems?

[Eddie 70]

3rd horn drawing too much current for the stock sized fuse. It is used for the 2 horns. Putting the 3rd horn in  parallel does not reduce the total current the fuse sees.

[austingta]

Just wire the new horn to one pole, 12v from battery to another and the source wire to the third. Follow directions. Works like stock. That's what they're for. 

[qrk]

I'd prefer not to run wires all over the place or get too deep into the fuse box.  Doesn't sound like there's a clean and simple installation like I was hoping for.  I may just disconnect the high note horn and use the air horn as a replacement for one of the stock horns rather than as an addition.

[austingta]

You could put in a slightly bigger fuse.