Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify the scan tool Hazard Lamps Switch parameter changes between Active and Inactive while commanding the hazard lamps ON and OFF with the hazard warning switch.
- If the parameter does not change
  Refer to Hazard Warning Switch Malfunction.
- Go to next step: If the parameter changes
Verify all left and right turn signal lamps turn ON and OFF while commanding the hazard lamps ON and OFF with the hazard warning switch.
- If all turn signal lamps do not turn ON and OFF
  Refer to Turn Signal Lamps and/or Indicators Malfunction
- Go to next step: If all turn signal lamps turn ON and OFF
Verify the hazard warning switch backlighting turns ON and OFF while commanding the Hazard Lamps Switch Backlight ON and OFF with a scan tool.
- If the hazard warning switch backlighting does not turn ON and OFF
  Refer to Hazard Warning Switch Backlighting Malfunction.
- Go to next step: If the hazard warning switch backlighting turns ON and OFF
All OK.