I just bought a 1992 240sx se coupe with wiring problems. The horn doesn't work. I did some reading and found out that the horn wire under the steering column is green w/ white line.
Is that it?

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I though that was it so I cut it and touched the wire to a metal piece for ground. Nothing happened, but then I realized I don't have a horn. Well, I'm not sure.
Is this the or was the horn?
This is how my steering wheel looks like
Please help, I need to pass inspection!