I have bought a magna and it has an aftermarket steering wheel, the i have found the horn under the left headlight behind the bar and disconnected it finding that i have no power to the wires connecting to the horn (checked with a power tester) I think the problem is more up in the steering wheel but im not sure what? I have ONE black wire that is screwed into the steering wheel column (hole) and it comes out into a crimp sortof thing to connect to my steering wheel, and that it for wires coming out of there.. Whats the problem :||||

Check the wires from the horn and check that they run into the front loom properly.

Aftermarket steering wheels are headaches, I'm not even going there.

The wires that come out of the horn dont actually appear in my steering column at all, i cant see the wires, all i have is the black earth wire that is connected to the one of the 2 plates on the sports wheel