Illumination of switches 1 (PWM1): Shortcut to U30
â–¶ How to fix
1. Check the harness
What you'll see
No driver-visible symptom recorded.
System reaction
LEDs are lightning at PWM 100%
Diagnostic depth
Detection
The feedback for the load for PWM1 is indicating short circuit to battery.. Only stored when ignition is ON.
Possible cause
1) The harness is shorted to U30 2) Internal shortcircuit to U30