Grand Caravan V6-3.3L VIN R (2005)
Rear Defogger Switch: Description and Operation
A/C Heater Control - Typical
The switch for the rear window defogger (EBL) system is integrated into the A/C-heater control, which is located in the center of the instrument panel.
When the rear window defogger switch is activated, the A/C-heater control requests the front control module (FCM) 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.
An LED indicator will illuminate when the rear window defogger switch is activated. When the switch is activated, the A/C-heater control requests the
front control module (FCM) to operate the rear window defogger (EBL) relay. The EBL relay controls the current flow to the grids of the rear window
defogger 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 five
minutes.
The EBL system will initially be on for approximately ten minutes or until the rear window defogger switch or the ignition switch is turned off. After the
initial time interval has expired, if the defogger switch is turned On again during the same ignition cycle, the EBL system will automatically turn off after
about five minutes.
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.
