Circuit/System Verification
WARNING: This page is about a different car, the 2021 Buick Enclave. 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.
- Go to next step: If the parameter changes
- If the parameter does not change
- Verify the switch backlight/amber indicators for the components listed below dim from LOW to HIGH while operating the dimmer switch from LOW to HIGH.
- Dome Lamp Cancel Switch Amber LED Indicator
- Driver Mode Select Switch Amber LED Indicator
- Hazard Switch Backlight
- If the switch backlight/amber indicators do not dim from LOW to HIGH
Refer to the appropriate Switch Indicator LED Backlight Malfunction.
- Go to next step: If the switch backlight/amber indicators dim from LOW to HIGH
- Verify all backlight components turn ON and OFF while commanding the LED Backlight Dimming ON and OFF with a scan tool.
- If all backlight components do not turn ON and OFF
Refer to Interior Backlight Malfunction.
- Go to next step: If all backlight components turn ON and OFF
- If all backlight components do not turn ON and OFF
- All OK.