Astra, 2004, Horn blast unless i put the radio on?

find the fuse for the horn and take it out, then start the car up, check the were you press on the horn to beeb it, see if its stuck down, if you keep the fuse out it wont sound, till you can get somebody to check it out. , look at your fuse box in the car take the lid off it should tell you on the lid cover what fuse is for the horn,

m
February 2015