I think only my high tone horn has ever worked.
I have a pair of air horns that were standard on the 205GTi 1.9 in the garage. Is it a simple electrical job to wire them up to the Sierra wiring.
I thought they were quite good horns std on the 205Gtis - or is the std Cossie one loud when it's working properly? (i.e. both low and high tone )