It does not sound horn

Estimated, I have problems with the horn of my Mitsubichi Galant 95 car, Sedan Model, does not sound, check it and apparently the speakers are in good condition, but the voltage does not arrive from the helm, opened the helm and the buttons are in good condition but the 12v of the common one does not arrive either.
Please gather with some suggestion and detailed as I could disassemble the helm to verify the electronic card that he possesses.
And if they could facilitate any technical information of the electrical system.
Thanks in advance.

The first thing is to provise the speakers with direct current to see if they sound, then check the fuses and then the relay before disarming anything.

Aja I ask about my bosina is a 2000 neon, when I turn the rumble of the steering wheel it sounds to me and I know that it sticks sounding goes out and Suenna again

You must remove the lid from the bollante (Hojo if you have Airbac) and Veca that the cables are not loose or chopped.