ok so i have the roomster but figured this would be more of a mod that would be done on a fabia
i have the weedy single tone horn and looking on etka the high tone on the dual horn is the same part number as the single tone fitted on mine but also has the addition of a low tone as well for dual model's
i cant work out if the wiring will need altering or if the std plug i have fitted will plug into one horn only with a link lead of some sort to the 2nd horn
any body carried out this mod