2008 Dodge Ram 2500 Pickup Owner Manual - Page 198

196 UNDERSTANDING YOUR INSTRUMENT PANEL INSTRUMENT CLUSTER DESCRIPTION 1. Check Gauges - Premium Cluster Only This light illuminates when the Voltmeter, Engine Oil Pressure or Engine Coolant Temperature gauges indicate a reading either too high or too low. Examine the gauges carefully, and follow the instructions contained below for each indicated problem. NOTE: When the ignition switch is turned to OFF, the Fuel Gauge, Voltmeter, Oil Pressure and Engine Coolant Temperature gauges may not show accurate readings. When the engine is not running, turn the ignition switch to ON to obtain accurate readings. 2. Voltmeter When the engine is running, the gauge indicates the electrical system voltage. The pointer should stay within the normal range if the battery is charged. If the pointer moves to either extreme left or right and remains there during normal driving, the electrical system should be serviced. NOTE: If the gauge pointer moves to either extreme of the gauge, the "Check Gauges" indicator will illuminate and a single chime will sound. The "Check Gauges" indicator may also illuminate prior to the voltage gauge moving out of normal range. In either case, see you local authorized Dealer for system service. 3. Turn Signal Indicators Lights in instrument cluster flash when outside turn signals are operating. 4. Tachometer The Tachometer indicates engine speed in revolutions per minute.