RAM 1500 Truck 4WD V8-4.7L (2008)
Temperature Gauge: Description and Operation
Description
DESCRIPTION
An engine coolant temperature gauge is standard equipment on all instrument clusters. The engine coolant temperature gauge is located in the lower right
quadrant of the instrument cluster, below the oil pressure gauge. The gauge consists of a movable gauge needle or pointer controlled by the instrument
cluster circuitry and a fixed 90 degree scale on the cluster overlay that reads left-to-right from C (or Cold) to H (or Hot) for gasoline engines. On
vehicles with a diesel engine, the scale reads from 60 °C to 120 °C in markets where a metric instrument cluster is specified, or from 140 °F to 245 °F
in all other markets. An International Control and Display Symbol icon for Engine Coolant Temperature is located on the cluster overlay, directly
below the left end of the gauge scale.
The engine coolant temperature gauge graphics are black against a white field except for a single red graduation at the high end of the gauge scale
making them clearly visible within the instrument cluster in daylight. When illuminated from behind by the panel lamps dimmer controlled cluster
illumination lighting with the exterior lamps turned ON, the black gauge graphics appear blue-green and the red graphics still appear red. The gauge
needle has internal optical illumination. Gauge illumination is provided by replaceable incandescent bulb and holder units located on the instrument
cluster electronic circuit board.
The engine coolant temperature gauge is serviced as a unit with the instrument cluster.
