Musical air horns

[Ben]

Hello wondering if anyone could help me. I bought one of these ages ago and ended up selling it because i couldnt be bothered to sit down and install it. however, i got the fancy for one again so gonna get another one off ebay but was wondering if anyone ahd installed one before and had any advice / pics or if anyone knows what kind of place i could take it to for them to install it for me? Do you wire it into the horn or a seperate circuit??

any help appreciated?

 

[Titch]

seperate circuit.
2 earths and a positive. run positive from battery to switch from switch to horns relay. earthed.

done
flick the switch the horns compressor builds up andf sets the horns off

meh sorry didnt realise titich was still logged in

wayne