nardi deepcorn in eg- horn doesnt work

[yellows2k]

i have a nardi deepcorn, i pulled the wheel off the boss and tried to connect and disconnect the wire to the horn button, but no luck. its fitted to an eg5.
any advice appreciated

[rayb3na_]

you have to ground one of the wires i had that problem with mine too

[yellows2k]

how do i do that?
i got the black one still connected, but the red on is not connected, its loose in my boss kit