Overload on horn output
â–¶ How to fix
Check the number of loads connected. Also check for short circuit in the cable harness (pin B12).
What you'll see
No driver-visible symptom recorded.
System reaction
Brake light is out of order. The output is permanently turned off until function is deactivated. Each time the function is activated a new detection is being done.
Diagnostic depth
Detection
Horn is out of order.
Possible cause
Short circuit or too high load on the horn output. The problem could also depend on short circuit in cable harness.