Horn
â–¶ How to fix
Check the horn switch (S26) and its wiring to the control unit.
What you'll see
No driver-visible symptom recorded.
System reaction
No system-reaction text recorded.
Diagnostic depth
Detection
The control unit input for the horn switch has been short circuited to earth for a period of time longer than 45 seconds.
Possible cause
Short circuit in horn switch (S26) or wiring. The switch can also have been affected by the driver for longer than 45 seconds.