phoenix, dont fit it, it ticks like a clock and is very annoying, i had one back when i bought the cupra just for testing it but got rid straight away as the noise was rubbish, get an automoeter one as its dampened and doesnt sound like its broken. (ie its silent)
 
should be
black= earth
red= live with ignition on
yellow= light, eg connnect to your light on your fag lighter