Wrangler 4WD V6-3.8L (2009)
Four Wheel Drive Indicator Lamp: Description and Operation
4WD Indicator - Description
DESCRIPTION
A four-wheel drive indicator is standard equipment on all instrument clusters. However, on vehicles not equipped with the optional four-wheel drive
system, this indicator is electronically disabled. For domestic market vehicles, this indicator is located within the odometer Vacuum Fluorescent Display
(VFD) unit. For export market vehicles, this indicator is located on the right side of the cluster overlay near the top, above the engine coolant
temperature gauge.
The domestic four-wheel drive indicator consists of the text 4WD in the VFD display. The odometer VFD unit is soldered onto the instrument cluster
electronic circuit board, and is visible through a window with a smoked clear lens located on the lower edge of the tachometer gauge dial face of the
cluster overlay. The dark lens over the VFD prevents it from being clearly visible when it is not illuminated. The four-wheel drive indicator text appears
in an amber color and at the same lighting level as the other odometer VFD information when it is illuminated by the cluster electronic circuit board.
During daylight hours (exterior lamps are OFF) the VFD unit is illuminated at full brightness for clear visibility. At night (exterior lamps are ON), the
VFD unit lighting level is adjusted with the other cluster general illumination lamps using the panel lamps dimmer function of the interior lighting
control sleeve on the left multi-function switch control stalk. However, a PARADE mode position of the control sleeve allows the VFD unit to be
illuminated at full brightness if the exterior lamps are turned ON during daylight hours.
The export four-wheel drive indicator consists of a stencil-like cutout of the text 4WD in the opaque layer of the instrument cluster overlay. The dark
outer layer of the overlay prevents the indicator from being clearly visible when it is not illuminated. An amber Light Emitting Diode (LED) behind the
cutout in the opaque layer of the overlay causes the indicator to appear in amber through the translucent outer layer of the overlay when it is illuminated
from behind by the LED, which is soldered onto the instrument cluster electronic circuit board.
The four-wheel drive indicator is serviced as a unit with the instrument cluster.