ive also noticed since changing the battery,that the horn has stopped working, blown fuse maybe?

maybe or dodgy connections (usually at the horn) in the horn circuit,check the fuses although the horn will share a circuit with something else so is everthing else working?check and clean the horn connections

The Fiat Cinquecento
Fun While It Runs

be careful with the airbag!

Met Cognac 99 Brava 100 HSX, wish it'd clean itself!