I've just installed the Momo cup steering wheel. Followed various instructions from here. No problem fixing the air bag delete using the supplied resistor from Carnewal. However I just can't get the horn working.

Connected up the L shaped contact (soldered the brown+white wire from red connector) which supplies power to the brass contact on the boss. But what about the other wire. The horn only sounds when you complete this circuit. How do I get this wire up to the back of the horn button?

You can see in the picture the brown wire I'm talking about (temp wrapped on the top of aluminum face plate). If I touch this to the L shape contact the horn works so I know it's got correct power.



Has anyone got a fix for this?

Many thanks.