Expedition 2WD V8-5.4L SOHC VIN L (1997)
Heated Element: Description and Operation
The Generic Electronic Module (GEM) controls the heated backlight grid and heated mirrors by controlling the state of the heated backlight/mirror
relay. When the heated backlight/mirror switch is pressed, the GEM will activate the heated backlight/mirror relay. When the heated backlight/mirror
relay is active, both the heated backlight grid and heated mirror elements will be energized.
The GEM will deactivate the heated backlight/mirror relay when one of the following conditions is met:
^
The heated backlight/mirror switch is pressed when the feature is active.
^
Ignition switch state is changed from RUN to OFF/LOCK.
^
The 10 minute timing function is completed. Feature Inputs:
^
Ignition switch RUN position (12V on both RUN and RUN/ACC inputs).
^
Heated backlight/mirror switch (momentary contact to ground when switch is pressed).
Feature Outputs:
^
Heated backlight/mirror relay control (grounded when activated, open circuit when deactivated).
