Circuit/System Verification

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Cover the windshield with a blanket or other suitable item.
Verify the A10 Inside Rearview Mirror face dims when shining a bright light into the rear light sensor
- If the A10 Inside Rearview Mirror does not dim
  Refer to Circuit/System Testing - Inside Review Mirror Dimming Inoperative
- If the A10 Inside Rearview Mirror dims
Verify the A10 Inside Rearview Mirror face transitions from dim to bright while commanding the Backup Lamps Active and Inactive with a scan tool.
- If the A10 Inside Rearview Mirror does not transition between dim and bright.
  Refer to Circuit/System Testing - Day-Night Disable Malfunction
- If the A10 Inside Rearview Mirror transitions between bright and dim states
Verify the A9A Outside Rearview Mirror-Driver face dims when shining a bright light into the rear light sensor.
- If the A9A Outside Rearview Mirror-Driver does not dim
  Refer to Outside Rearview Mirror Dimming Malfunction.
- If the A9A Outside Rearview Mirror-Driver dims
Verify the A9A Outside Rearview Mirror-Driver face transitions from dim to bright while commanding the Backup Lamps On and Off with a scan tool.
- If the A9A Outside Rearview Mirror-Driver does not transition between bright and dim states
  Refer to Outside Rearview Mirror Dimming Malfunction.
- If the A9A Outside Rearview Mirror-Driver transitions between bright and dim states
All OK.