This wire runs up the steering column to the steering wheel horn button. It was already damaged. The horn button or the wire to it is not working. If I jump this wire to ground, it activates the horn relay and the horns sound. This wire will be routed to a push button on the dash then grounded to dash frame.
4/16/15 Update:
Horn button installed in dash where previous owner had cut hole for something.
Blue wire was run to button in dash then to ground.