Check the fuses. Wiring to the horn. Wiring on the horn itself is not corroded. Then you will need to check the switch itself.
Steering column switches consist of the following components:
Cruise control switch (if equipped).
Multifunction switch, located on steering column, includes turn signal, hazard, headlight dimmer, flash-to-pass and front windshield wiper/washer switches. Ignition switch and lock cylinder are also mounted on steering column. Cruise control switch is integrated into clockspring harness with horn and air bag restraint system, all located on steering wheel. Driver's side air bag is located on center of steering wheel. Steering column switches circuits are protected by fuse No. 7 (40-amp) in Battery Junction Box (BJB), located in engine compartment. Steering column switch circuits are also protected by fuses No. 11, 15, 27, 36 and 38 in Central Junction Box (CJB), located behind left side of instrument panel.
Saturday, August 15th, 2020 AT 12:29 PM