Commander 4WD V6-3.7L VIN K (2007)
Speedometer Head: Description and Operation
Description
DESCRIPTION
A speedometer is standard equipment on all instrument clusters. The speedometer is located to the left of center in the instrument cluster, between the
tachometer and the fuel gauge. The speedometer consists of a movable gauge needle or pointer controlled by the instrument cluster circuitry and a fixed
210 degree primary scale on the gauge dial face that reads left-to-right either from 0 to 140 mph, or from 0 to 230 km/h, depending upon the market for
which the vehicle is manufactured.
Each version also has a secondary inner scale on the gauge dial face that provides the equivalent opposite units from the primary scale. Text appearing
on the cluster overlay above the hub of the speedometer needle abbreviates the unit of measure for the primary scale (either MPH or km/h), and text
inside the low end of the secondary scale indicates the unit of measure for that scale.
The speedometer graphics are white against a black field, 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 primary scale graphics still appear
white, and the white secondary scale graphics appear blue-green. The red gauge needle has internal optical illumination. Gauge illumination is provided
by Light Emitting Diode (LED) units soldered onto the instrument cluster electronic circuit board.
The speedometer is serviced as a unit with the instrument cluster.
