Circuit/System Verification
WARNING: This page is about a different car, the 2013 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON.
- Verify the scan tool LED Backlight Dimming Command parameter changes between a high percentage to a low percentage while operating the dimmer switch from high to low.
- If the parameter does not change
Refer to Dimmer Switch Malfunction .
- If the parameter changes
- If the parameter does not change
- Verify all backlighting components turn ON and OFF while commanding the LED Backlight Dimming ON and OFF with a scan tool.
- If all backlighting components do not turn ON and OFF
Refer to Interior Backlighting Malfunction .
- If all backlighting components turn ON and OFF
- If all backlighting components do not turn ON and OFF
- All OK.