2008 Dodge Ram 3500 Pickup Owner Manual - Page 210

208 UNDERSTANDING YOUR INSTRUMENT PANEL 31. CRUISE Light This indicator lights when the electronic speed control system is turned on. 32. Coolant Temperature Light - Base Cluster Only This light indicates engine coolant temperature is to high. If the light comes on, stop the vehicle, shift into NEUTRAL, and increase the engine idle speed for two to three minutes. If the light does not turn off, shut your engine OFF and allow it to cool. See an authorized dealer for service immediately. Refer to "Cooling System" under "Maintaining Your Vehicle" in section 7. NOTE: Engine idle speed will automatically increase to 1000 rpm at elevated coolant temperatures to improve engine cooling. 33. Battery Voltage Indicator Light - Base Cluster Only When the engine is running, this light indicates the electrical system voltage is out of normal range. This 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. 34. Oil Pressure Indicator light - Base Cluster Only This light indicates continuous high or low oil pressure, and under normal driving conditions, may indicate a lubrication system malfunction. Immediate service should be obtained. CAUTION! Do not leave your vehicle unattended with the engine running as you would not be able to react to the temperature indicator if the engine overheats.