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Air horn wiring

Submitted: Wednesday, Jan 02, 2008 at 18:45

Member - GeeTee (NT)

I am trying to wire in a set of air horns to the 2007 Nissan Patrol. My question is, does the horn button extend battery to the horn or does it extend an earth ? Does anyone have a wiring diagram ?
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ThreadID: 53051 Replies: 5
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AnswerID: 279430   Submitted: Wednesday, Jan 02, 2008 at 19:00

Member - Roachie (SA) replied:

If you mean is the OE horn negative earthed, the answer is yes.

All you need to do is wire up a relay...... the 4 prongs go to:

Battery

Earth

The air horns compressor

The original horn. With this, usually get one of those spade terminals which has a female section with a male section as well. I plug the original horn wire onto the male section of the new spade which in turn is plugged into the air horn compressor, with it's wire going to the relay (as mentioned above).

I'm assuming you have a "normal" set of air horns (like Fiamm)? I actually use a different set up with 2 trumpets (1 is 12" long and the other 15" long)....these require a receiver tank with compressed air there all the time...when you press the horn button it opens 2 solenoids to allow the pressurised air to go down the trumpets; much louder.

Cheers

Roachie

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FollowupID: 543656   Submitted: Thursday, Jan 03, 2008 at 07:19

Member - GeeTee (NT) posted:

Thanks Roachie, Thought it was, as there was only one wire connected to it. However when I wired it up, via a relay, and tried it the existing horn gave a "squeek" and that was it.... no more noise ! It appears that the existing relay is not operating. Will have to do some more checking this morning. I have a set of Stebel air horns.
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AnswerID: 279438   Submitted: Wednesday, Jan 02, 2008 at 19:30

Shep replied:

GeeTee a multi meter should be able to establish which is earth or 12volt ,if you don't have a multi meter on of those cheap 12volt test lamps would also do the same job.
With the lamp connect the clamp to the Neg (-) on the battery or pick up an earth on the motor and with assistance have someone press the horn button, use the other end of the test lamp to touch the wires concerned if nothing happens its an earth (- neg) wire if the lamp illuminates its Positive wire (+)
Rgds
Shep
Reply 2 of 5
AnswerID: 279448   Submitted: Wednesday, Jan 02, 2008 at 20:33

Member - Doug T (FNQ) replied:

This website will explain and show how to wire up a Relay

Standard Relay Wiring

.
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AnswerID: 279483   Submitted: Thursday, Jan 03, 2008 at 07:10

Ozboc replied:

bugger the generic horns , you know anyone that works on trains ??? get one of those , then the next time some pimple faced "p" plater cuts you off - give him a blast and watch him add a new dint to the roof of his car !!


Boc

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FollowupID: 543678   Submitted: Thursday, Jan 03, 2008 at 09:38

Member -Signman posted:

Funny you should mention that..
I fitted a 'Nautilus' Air Horn to Troopy. I was following a P plater and she was on the mobile phone. I gave her a quick blast with the horn- and she dropped the phone out of the window of the car !!
She wasn't happy- I peed meself laughing !!
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FollowupID: 543685   Submitted: Thursday, Jan 03, 2008 at 10:06

Truckster (Vic) posted:

the train horn threads have been done before.

I want one where you can record your own sounds, I'd have a machine gun, train horn, and someone screaming.. one after the other.
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AnswerID: 279498   Submitted: Thursday, Jan 03, 2008 at 09:53

Member - GeeTee (NT) replied:

Thanks for the input guys. Problem solved. There is another fuse in the horn circuit and it was blown, replaced and all OK. Must have shorted something out momentarily somehow. Now lots of noise ! !
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