Chrysler 2004 Town and Country Manual page 217

Rear Blower Control
The primary control for the rear blower is on the front
climate control unit located on the instrument panel.
The center knob on the front climate control unit has five
positions, "REAR", "OFF", and a range of blower speeds.
UNDERSTANDING YOUR INSTRUMENT PANEL 217
Only when the primary control for the rear blower is in
the "REAR" position do the second seat occupants have
control of the rear blower speed.
The rear blower control, located in the headliner near the
center of the vehicle has an OFF position and 3 blower
speed positions. This allows the second seat occupants to
control the volume of air circulated in the rear of the
vehicle.
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