I have watched all the videos I can find & all seem to be describing a solution to someone who already knows it. I have the complete wiring diagram but it does not go into detail on the horn ground path. I can get continuity from the horn ground wire at the horn to where it's soldered onto the steering wheel bearing. I get no continuity from the wire in the center of the steering column to ground. How is that wire routed & where is it terminated?