Horn button removal.

Hi guys, sorry for such a mundane question but I'm scared of damaging anything. My 246 horn was intermittent but day before MOT stopped working altogether.
Power is not getting to the horn relay so I suspect connection to the horn button has come adrift.
How do I remove the horn button to examine the workings?
Advice, as ever, gratefully received!

Thanks,
Chris.

 

Thanks Iain! I did think that might be it but mine seemed very tight in the boss. I'll be back on it this w/e.
Cheers,
Chris.

 

Thanks Iain and Alberto,
The button did come out easily and connection intact. Grounding it failed to activate horn and there is no power in the live feed to the button. There is power to the horn relay though and the relay clicks into action when independent battery connected to the positive and negative terminals on the relay, but still does not activate the horn (I checked another car with working horn and is the same and I'm puzzled why).

The problem seems to lie somewhere between the horn connection in the button and the relay, which is very difficult to follow. Methinks a visit to the auto electrician is the next step.

Thanks anyway for your help on such a mundane problem. I'll try and come up with something more interesting next time

Chris.

 

Thanks Ken, it's a good idea to check up on maintaining the horn and I will do so. However I've just realised my (stupid) mistake in looking for power to the back of the horn button! Of course it just breaks the connection to earth. I made a connection from the negative terminal on the relay to earth and then have a fully working horn. So I have a breakdown in the wiring somewhere between the neg terminal on the relay and the run up the steering column to the back of the button, or the steering column is not properly earthed.
At least I'm now looking in the right direction!