ok i'll have a crack at this.
this is for an NA6. I have used the wiring diagram supplied with the horn, along with the great advice posted by Tbro in the other thread as my guide.
Tbro has advised that the 12v source i am using is fused. however we do not know exactly what fuse it is using , tbro says \"this wire is only HOT when ignition is on so will probably be the wiper or horn fuse. All connectors on Mazdas are protected by fuses or circuit breakers.\"
thanks terry / tbro for all the advice!
OK.
first up this is the standard horn , before i have touched anything. i think there is supposed to be 2 horns as there is an unused horn plug on the right hand side. maybe that is why my standard horn sounds so pissweak. note i have removed the nose, but this is not neccesary at all. i removed it for another reason alltogether, but it probably did make the job a bit easier.
so in the above photo you can see the green /red horn wire running across the front of the car, held in place by a few plastic clips. unclip these clips, unbolt the old horn, and unclip the wire from the old horn.
feed all the wire back thru the opening under the headlight. just follow it back from where it came and poke all the wire thru to the engine bay just behind the passenger side headlight. now, the lucky thing is that the clip on the end of the wire matches up with the relay. there are 4 terminals on the relay, clip the wire onto terminal 86 as shown below
in the above photo you can also see the blue connector that you are going to use for your 12v. this is an extra terminal that mazda kindly put there so that you can power your timing light or whatever when you are working on the car. take the plug off the end to expose the 12v terminal.
now you will need this stuff to make some wires. go to jaycar, dick smith , go lo etc etc...
make yourself a wire to run from the 12v source, to terminal 30 on the relay. your terminal kit will have different sized connectors, make sure you use the right ones.
and then connect the 12v up to terminal 30 on the relay
in the above photo just behind the relay you can see an earth point for an old unused alarm on my car. i am going to steal this wire for my ground. your car will not have this wire but you can use any old earth point, it doesn't matter. so i just cut that wire, put a terminal clip on it and attach it to terminal 85 on the relay
ok now you need to start thinking about where you are going to mount the horn . . again this is up to you. tbro and 1red5 made a really awesome bracket in the other thread. mine is just a peice of bent metal but it does the job. i took an angle grinder to the bolt supplied with the horn, as i found it was too long.
here it is all ready to go. i have also attached the wires to the horn. keep the wires nice and long and then you can neaten them up at the other end, once the horn is in place.