2004 Dodge Ram 3500 Pickup Owner's Manual - Page 149

UNDERSTANDING YOUR INSTRUMENT PANEL 149 The trip odometer shows individual trip mileage. To toggle between the odometer and the trip odometer, press the Odometer/Trip Odometer Button. To reset the Trip Odometer, press and hold the button while in trip mode, until the Trip Odometer resets. NOTE: There is also an engine hour function. This indicates the number of hours the engine has been running. To display the engine hours perform the following: Place the ignition in RUN, but do not start the engine. With the odometer value displayed, hold the trip button down for a period of 6 seconds. The odometer will change to trip value first, then it will display the engine hour value. The engine hours will be displayed for a period of 30 seconds until the ignition is turned off or the engine is started. 21. TOW/HAUL (Automatic Transmissions Only) The TOW/HAUL button is located at the end of the gear shift lever. This light will illuminate when the TOW/ HAUL button has been selected. 22. LAMP OUT Light The LAMP OUT indicator in the instrument cluster alerts the driver if a defective bulb or wiring circuit is detected for most of the exterior lamps - headlamps, turn signal lamps, and stop lamps. 23. SERV 4WD Indicator The 4WD indicator will be illuminated whenever the 4WD mode is engaged for either the manual or electric shift 4WD systems. The SERV 4WD indicator monitors the electric shift 4WD system. If the SERV 4WD light stays on or comes on during driving, it means that the 4WD system is not functioning properly and that service is required. 4