Rear Defogger Switch - 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 to the Totally Integrated Power Module (TIPM) to energize the internal Electric Back Light (EBL) high side driver to provide battery current to the rear window defogger grid lines and to the heated side view mirrors.

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

The EBL system will be automatically turned 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 five minutes. The EBL system will automatically shut off if the ignition switch is turned to any position other than RUN, or it can be turned off manually by pressing the rear window defogger switch a second time.

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

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