Horn Failure / Steering Wheel Controls Partly Inoperative

Horn Failure/Steering Wheel Controls Partly Inoperative







Fault symptom
Horn does not work but no DTC generated.

Not all steering wheel controls work, no DTC.

Diagnostic help
The horn buttons can be read with the diagnostic tool.

The horn outputs can be activated with the diagnostic tool.

Checking the wiring harness
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Check switches, connectors and crimp connections for oxidation, withdrawn pins and pin clamping force.