Liberty 4WD L4-2.8L DSL Turbo VIN 5 (2006)
Heated Glass Element Switch: Description and Operation
SWITCH-REAR WINDOW DEFOGGER
DESCRIPTION
The rear window defogger switch (1) is integrated into the A/C-heater control (2) located in the instrument panel. When the rear window defogger switch
is activated, the A/C-heater control requests the body control module (BCM) to operate the rear window defogger (EBL) relay.
When the EBL relay is activated, current is directed to the rear defogger grid lines and the heated side view mirrors (if equipped). The grid lines heat the
glass to help clear the surface of fog or frost.
OPERATION
An LED indicator will illuminate when the rear window defogger switch is activated. When the switch is activated, it energizes the timing circuit integral
to the body control module (BCM), which then activates the rear window defogger (EBL) relay. The EBL relay controls the current flow to the grids of
the rear window defogger and when equipped, the heated side view mirrors.
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 a programmed time interval of about 10 minutes as long as the ignition switch is the Run position.
After the initial time interval has expired, if the rear window defogger switch is turned 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 and the rear window defogger LED indicator cannot be repaired and, if faulty or damaged, the A/C-heater control must
be replaced.