They don't press down very much. I think mine only moves about an 1/8". They are not as springy as the earlier trucks and cars with the big coil spring under the horn button.
Mark

 

 

Here is a photo of how it goes together.


The dome goes down and the tabs set on the shoulder of the wire connector. When you press the horn button, the outside edge of the ring will touch the copper plated cover underneath and complete the connection from the horn wire to ground.
Mark

 

 

The spring is installed like pic #1, but the tips of the spring should set on top of the flange of the wire connector and hold it down against the insulator. Is your spring a repop? It looks like the distance between the tips of the fingers is too wide to set on top of the wire connector flange. The flange on the wire connector may be too small also. In my photo you can see the spring tips setting on the connector flange. My spring is original and so is the wire connector.
Mark

 

it is a new wire from....LMC so that should be enough information as to why it isn't correct. I can pull that wire and metal end thru the disk without touching. I have tried to bend the prongs in to touch, but that flattens the disk. Can a brass washer be used under the wire end do you think?

 

You could solder a brass washer to the connector under the flange. Just slipping a brass washer on the connector under the flange wouldn't hold the wire down, but it may still work just fine.
Mark