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after market wheel, need to "hardwire" a Horn, help :O

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right im in a pickle, bought my car with a aftermaket wheel fitted and no horn.
today i set of about fitting the horn to a button on the dash, now i just cant find the horn live wire.
i've been told its a green black wire but i cant find a green black wire anywhere inside the steering-wheel colum, bearing in mind i've never seen a s15 wheel connected so i dont know what wires went to the wheel or what plug the wire could be in.
if anyone has a picture of the wire and the connector i would find my feet and be really thankful, been looking for a write up or something but cant find one i've the NCT saturday so i need it before then :eek:
Alan
 
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drifter

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It won't be a live mate, the wire in the steering column is an earth :)

When you push the horn it earths a relay which then powers the horn.

What you need is to find that wire in the steering column, connect it to one side of a button with the other side connected to earth. I had to do this in my S14 thanks to a shonky boss, the S15 has a HKB boss which takes care of everything.
 
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sorry yes its compleating the circuit by earthing it, i know what you mean, still just lookign for the wire tho :( any one got a picture of it?
 
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if you really cant find it and get sick of trying to find it, just run a new wire from the horn itself to the dash and just switch it off the 12v feed coming into the ignition. (not the acc 12v) done
 
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Does this help??

Im guessing LG/B is "light green / black" and B/R is "black or brown red"

 
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