Switch, Defogger: Description: Description
MTC A/C-heater control shown in illustration. ATC A/C-heater control similar.
The switch for the rear window defogger (EBL) system is integral to the mode control knob (4) located on the A/C-heater control (1), in the instrument panel. When the rear window defogger switch is pressed to the On position a request signal is sent to the Cabin Compartment Node (CCN), which sends a message to the Totally Integrated Power Module (TIPM) to operate the EBL system.
When the high side driver in the TIPM is energized, current is directed to the rear defogger grid lines and to the heated side view mirrors (when equipped) to help clear the glass surfaces of fog or frost.
An amber indicator in the mode control knob will illuminate when the EBL system is turned on.