Operation

OPERATION

An amber indicator will illuminate when the rear window defogger switch is activated. When activated, the switch sends a request signal to the totally integrated power module (TIPM) to energize the internal EBL high side driver to provide battery current to the rear window defogger grid lines and to the heated side view mirrors, when equipped.

NOTE: The EBL system turns off automatically after 10 minutes of initial operation. Each following activation cycle of the EBL system will last 5 minutes.

The EBL system will automatically turn off after an initial programmed time interval of about 10 minutes as long as the ignition switch is in RUN. After the initial time interval has expired, if the rear window defogger switch is pressed to ON again during the same ignition cycle, the EBL system will automatically turn off after about 5 minutes. The EBL system will also turn off if the ignition switch is turned to any position other than RUN or by manually pressing the rear window defogger switch a second time.

The rear window defogger switch is diagnosed using a scan tool.

The rear window defogger switch and indicator cannot be adjusted or repaired. The A/C-heater control must be replaced if the rear window defogger switch or indicator is found inoperative or damaged A/C Heater Control - Removal.