For 1990-2009 cars only
Important: This step must be completed before using the symptom tables.
Review the system operation in order to familiarize yourself with the system functions. Refer to Automatic Day-Night Mirror Description and Operation .
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of the rear window defogger system or the inside rearview mirror. Refer to Checking Aftermarket Accessories in Wiring Systems. |
| • | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. |
Intermittent Conditions
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Symptom List
Refer to the following in order to diagnose the symptom:
