Air horn wiring

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

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

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

Standard Relay Wiring

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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

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 ! !