A Symptoms

SYMPTOMS - HEATED GLASS ELEMENT

IMPORTANT: For the inside rearview mirror with the automatic day-night feature or the rear window defogger (w/o CJ2), review the system operation in order to familiarize yourself with the system functions. Refer to the following:
- Automatic Day-Night Mirror Description and Operation
- Rear Window Defogger Description and Operation

For the rear window defogger (w/ CJ2) system, perform the following steps before using the symptom tables:
1. Perform Diagnostic System Check - Defogger before using the symptom tables in order to verify that the following conditions are true:
- No DTCs are set.
- The control modules can communicate via the serial data link. Diagnostic System Check - Heated Glass Element
2. Review the rear window defogger system operation in order to familiarize yourself with the system functions. Refer to Rear Window Defogger Description and Operation.

Visual/Physical Inspection
- Inspect for aftermarket devices which could affect the operation of the rear window defogger or the automatic day-night feature of the inside rearview mirror.
- Inspect the easily accessible system components for obvious damage or for conditions which could cause the symptom.

Intermittent
Bad electrical connections or wiring may be the cause of intermittent conditions.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
- Defogger Inoperative - Rear Window
- Defogger Grid Lines Diagnosis
- Mirrors - Automatic Day-Night Inoperative