And the ignition switch isn't involved.
Power circuitBattery → Fuse → Relay → Horns
Logic circuitRelay → Steering wheel contacts → Ground
Common causes are:
- Blown fuse (check fuse)
- Bad relay (swap relay)
- Bad horns (usually go one at a time)
Less likely but possible if you've done service in these areas:
- Bad ground wire connection in steering wheel behind airbag
- White X1/1 connector (located behind carpet in front trunk on the left side) not seated properly