Nissan Micra does not stop

Hello.
We have a Nissan Micra 1.5D GX from the year 98.
A few weeks ago, we took the key to the contact key and the radio was still on, that happened 5 or 6 times.
I stop doing it.
And now what happens to him, but not always, is that as before, when removing the key (turning it off), the radio is still on, but the engine is also on.
I have started looking online, and people talk about the fact that it is very normal for the fuel cutting solenoid not doing well, but looking at the schemes, I think it's not that, rather it is from the key contacts, of the switch ignition, off-ACC-ST.
Qaueria know what your opinion is before doing anything,
thank you very much.

I lean on in ignition control that is behind the key cylinder, it is in charge of starting and removing it, it is not a face and it is easy to change, of course you must first try it with a test lamp to see what happens.

Hello, I do not understand that of the lamp.
Do you mind clarifying that test?
Thank you.

If it is aranque bombin

Another thing, to replace it, will it be necessary to remove the steering wheel?
I have been watching in a YouTube video a replacement operation of the piece, and removes the steering wheel, the clauses, and the whole theme.
Thank you.