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84306-60020 is the part number of the spiral cable that you need. If you're getting power to the column and nothing to the connector inside the steering wheel behind the airbag then the spiral cable is bad. Click the attachment to see an illustration. If you Google search that part number you will find allot of places online that you can purchase the part from there's no way to repair the part. Provided your connectors are good you have to replace the spiral cable. Please do not forget to rate the assistance that I provided to you at three or higher.
There is no way to bypass that. At least going to the steering wheel. If the circuit is bad for the horn there's a good possibility the circuit will be bad for the SRS unit and you run the risk of damaging that and if an accident the airbag will not deploy. If for some reason you have to have a horn your best option at this point would be to put a remote button on the instrument panel or center console somewhere. Search that part number there were a few websites that show that is a good part number and available.