Hello again from Germany,
the reason for the fault was the berillium/copper contact (as recomended i used the original one) which was making contact to the outer column .
If someone has the same problems, some explanation, now that i see clear:
There could be NO short cut in the circuit as you only earth the wire to the horn relay (W1), when you push the horn button.
I cant also be the failure of the bearings outer/inner column as the inner column itself is isolated to the ground wire coming from the relay. Ground contact for the relay comes from the wire, goes to the berilium/copper unit,(picture 3 post 5; 3rd from right) from there contact is made thru the brass ring (looks like a crown; 1 from left) this ring itself is isolated against the inner column via the plastic ring (2 from left) where the tiny spring (4 from left) sits in. earth again goes thru the small spring (ball pen size) with a little pin (3 from left) at one end. this pin again makes contact to the inner brass rod which itself is also isolated against the inner column (5 from left , 1 and 2 from right). only when you push the horn, ground contact will be made thru the grub screws to the inner colunm which is connected via another copper contact (4 from right) to the outer column and the car itself.
Sounds complicated, but isnt so much, when you see thru.
Best regards
Robert
