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Switch between air horns and OEM...

gandrade1
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gandrade1 Member

gandrade1

Posted
Posted

Hi guys,

I need help here.

I took my car for the New Jersey State inspection yesterday and I failed for one reason – AIRHORNS!!!!!!!! They could not find anything else to fail me for, so they went for the horn… Well…it could be worse

Now I need some help here – I need to be able to switch between a non-air, OEM style, horn – (to be installed) and the air horns I currently have.

I currently have three trumpet Hella air horns in the place where the 3rd radiator would sit (posted in a different topic here). I wired it in such a way that I use the connectors that fed ONE of the two OEM horns and insulated the terminals that fed the other one. Now I need to be able to install an OEM horn and temporarily turn the air horns off so that I can pass the inspection only.

So I am thinking… Could I use the connectors which are now insulated (which used to power the second OEM horn) to hook up an OEM style horn? I would then remove the fuse that powers the 3-thrumpt for the inspection only (assuming the two fuses that power the 2 original OEM horns are separate).

Does anyone have another idea? Can I have an on/off switch in the trunk which alternates between OEM/Air horns? If yes, how should I wire this mess and what do I need to buy…

Thank you very much.

All the best,

Gus

gandrade1 Member

gandrade1

Posted
  • Author
Posted
Why not buy a tank instead?

If only they handled like a Boxster!

Anyway..thank you very much for your constructive advice. It helps me a lot!

Topless Member

Topless

Posted
Posted

Why not just install a DPDT switch to control your horns. Switch down for DOT approved OEM horn, switch up for Mariachi party. :D

Radio shack is your friend.

gandrade1 Member

gandrade1

Posted
  • Author
Posted
Why not just install a DPDT switch to control your horns. Switch down for DOT approved OEM horn, switch up for Mariachi party. :D

Radio shack is your friend.

Thank you...

If I follow this method. I assume I would simply remove the OEM connectors from the Air Horn, route them to the switch and from the switch I would have two sets of connectors - one to the air horns and one to the OEM.

Is there an specific 'name' or type for these connectors, other than simply DPDT or would the Radio Shack guys now what I am talking about right away?

Thank you so much.

All the best,

Gus

sd_boxster Member

sd_boxster

Posted
Posted

I think an SPDT switch would be fine for your needs and less confusing to wire, since they'll only be three contacts instead of six.

The guys at Radio Shack are pretty much only good at selling cell phones these days, so google SPDT switch and look at a few pictures so you know what you're looking for before you wander in...

sd_boxster Member

sd_boxster

Posted
Posted

Assuming there's a + and - lead to each horn assembly, you'd run the positive lead to the switch, (the center contact) and then bring off a wire from the switch leading to each horn assembly. When the switch is toggled one way, it will complete the circuit to the OEM horn; when it's the other, it will power your air horns.

I'd put the switch in a nice dark corner of the front trunk or something similar, since you probably only need to switch this for inspection. But that's just me.

Sound clip of the airhorns? I'm curious - the OEM horn seems pretty loud to me.

Good luck!

Topless Member

Topless

Posted
Posted

Yes. As long as both horns have neg. leads to ground a Single Pole Double Throw switch will be fine. Connectors are your choice. Hot lead to switch, one lead to each horn. Done deal.

gandrade1 Member

gandrade1

Posted
  • Author
Posted
Yes. As long as both horns have neg. leads to ground a Single Pole Double Throw switch will be fine. Connectors are your choice. Hot lead to switch, one lead to each horn. Done deal.

Thanks guys,

All I have today is a set of +/- connectors leading to the air compressor and a pair of +/- unused, which used to power the second OEM horn.

Can I:

(1) remove the + terminal that goes to the air compressor route it through to the SPDT switch

(2) Take the - terminal currently unused and hook it up to an OEM horn

(3) Cut two pieces of hire to route from the switch to the positive terminals of the air compressor and the OEM horn?

If I use a DPDT how would my numbers above be different?

Thank you so much,

Gus

gandrade1 Member

gandrade1

Posted
  • Author
Posted

So I bought the Switch at Radio Shack just now...

It is numbered and I reproduced the numbers on my attachment below...

Would you guys be able to confirm that my diagram below is correct?

All the best,

Gus

post-17763-1233947088_thumb.jpg

Topless Member

Topless

Posted
Posted (edited)

Gus,

Your DPDT switch wiring diagram is correct assuming your source for 12vdc is the switched/fused OEM horn circuit and not direct from the battery.

Edited by Topless

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