RAM 3500 HD Truck 2WD L6-6.7L DSL Turbo (2008)
Tachometer: Description and Operation
Description
DESCRIPTION
A tachometer is standard equipment on all instrument clusters. The tachometer is located to the left of the speedometer, just to the left of center in the
instrument cluster. The tachometer consists of a movable gauge needle or pointer controlled by the instrument cluster circuitry and a fixed 210 degree
scale on the gauge dial face. The tachometer reads left-to-right from 0 to 7 for gasoline engines, or from 0 to 5 for diesel engines. The text RPM X
1000 is imprinted on the cluster overlay directly below the hub of the tachometer needle. This text identifies that each number on the tachometer scale is
to be multiplied by 1000 rpm.
The tachometer graphics are black against a white field making them clearly visible within the instrument cluster in daylight. When illuminated from
behind by the panel lamps dimmer controlled cluster general illumination lighting with the exterior lamps turned ON, the black graphics appear
blue-green and the red graphics still appear red. The gauge needle has internal optical illumination. Gauge illumination is provided by a replaceable
incandescent bulb and holder unit located on the instrument cluster electronic circuit board.
The tachometer is serviced as a unit with the instrument cluster.
