The SRS will have to be scanned to see what has failed, the horn may be the button, slip ring contact, fuse or horn, the Air bag uses a clock spring connection and not a slip ring so they will not be connected.
Feb 2, 2013 at 4:55 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.