Short circuit on roof light output
â–¶ How to fix
Trouble shoot cable harness, connectors and roof light light source
What you'll see
No driver-visible symptom recorded.
System reaction
Roof light is not possible to control
Diagnostic depth
Detection
Short to Supply evaluated cyclically when output is inactive. Short to GND evaluated cyclically when output is active. Voltage at pin PWM_OUT_3 out of valid range
Possible cause
Short circuit to supply or ground on ECU pin