Air Bag Sensor light on & horn not working
Without knowing exactly what the air bag code is, coupled with the known fact that the horn is inoperative, my opinion for a viable solution is to replace the spiral cable or, as commonly called, the "clockspring". This device is the main wiring connection between the steering wheel and the wiring harness. If the circuit(s) open,due to a failure of the spiral cable, the air bag light will be on, the horn will not work,and , if you have a steering wheel Cruise control, it too may be inoperative. Best solution: replace the clockspring. Best advice: Get the airbag DTC's checked, and if you have an open in the driver side air bag circuit, the clockspring is def the culprit. Given that you had chassis work, your DTC just may be the front crash sensor, and the horn may just be unplugged, or bad, This is the best I can do for you, given the info that you have provided,
Hope this helps, and thanks for choosing FixYa.