Connecting air horn to auxiliary switches

[Kilobravo]

Be aware that your electric motor will have a MUCH higher initial surge current than its rated 17 amps. I personally would want to protect my factory wiring from that excess current, I would install a separate 50 amp relay, and just use one of the other Aux switches to control it. Use heavy short wires from battery to relay to horn, for example 8AWG, with an inline fuse in the positive cable. What does the horn instruction manual say about this? That should be your main guidelines… did it come with a wiring kit?

if you want the horn to work off your steering wheel pad, instead of sounding CONTINUOUSLY, you will have to get creative.
https://www.ford-trucks.com/forums/1512956-how-to-wire-airhorn.html

I really like the stuff from this place, they make high quality, reliable products.

John Davies
Spokane WA USA

I was thinking about what you mentioned about the

Be aware that your electric motor will have a MUCH higher initial surge current than its rated 17 amps. I personally would want to protect my factory wiring from that excess current, I would install a separate 50 amp relay, and just use one of the other Aux switches to control it. Use heavy short wires from battery to relay to horn, for example 8AWG, with an inline fuse in the positive cable. What does the horn instruction manual say about this? That should be your main guidelines… did it come with a wiring kit?

if you want the horn to work off your steering wheel pad, instead of sounding CONTINUOUSLY, you will have to get creative.
https://www.ford-trucks.com/forums/1512956-how-to-wire-airhorn.html

I really like the stuff from this place, they make high quality, reliable products.

John Davies
Spokane WA USA

[/QUOTEouldn't the surge current from horn compressor be similar to that from a tyre inflator that we plug into the 12v socket. The 12v socket in the bed says 180w max

Be aware that your electric motor will have a MUCH higher initial surge current than its rated 17 amps. I personally would want to protect my factory wiring from that excess current, I would install a separate 50 amp relay, and just use one of the other Aux switches to control it. Use heavy short wires from battery to relay to horn, for example 8AWG, with an inline fuse in the positive cable. What does the horn instruction manual say about this? That should be your main guidelines… did it come with a wiring kit?

if you want the horn to work off your steering wheel pad, instead of sounding CONTINUOUSLY, you will have to get creative.
https://www.ford-trucks.com/forums/1512956-how-to-wire-airhorn.html

I really like the stuff from this place, they make high quality, reliable products.

John Davies
Spokane WA USA

Thanks for your response.

By chance do you know what the surge amount is, also would you happen to know what size fuse the 12v outlet in the bed uses. I see where that outlet says max 180 watts and I've read that aux 6 has a 25amp fuse with 2.5mm wire.

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[Raffi5593]

I am no expert in vehicle maintenance, nor am I an electrician. But I can tell you that I just had two of these installed over the weekend, and they are super loud. I still have my regular horn, and both of these are connected to my first Aux switch. Tankless as well....
https://motohorn.com/trainhorn/

I was looking into purchasing one of those also, their websites says it draws 20 amp so I am curious how it has been holding up on Aux 1 which is rated for 15 amp?