Well, enough to get the horn to work, which was needed to pass the Safety Inspection.
They had failed my 2002 Impreza wagon for no horn.
I provided a ground at the under dash connector and it worked fine, so continued up to the steering wheel.
No continuity between the lower dash connector and the horn wire. That pointed to the clock-spring.
Being in Hawaii and with limited parts I pulled it apart. careful taking it apart gave me access to the spool of wire ribbon that makes up the clock-spring.
Sure enough close to one end it was toast. I cut it back a couple of inches and stripped off the insulation with a razor blade. That allowed me to tuck the copper leads into the connector for the horn.
The airbag was out of it already and I sure would not have done this repair if I wanted the airbag to work. I just needed a horn for the island beater.