2003 Ford Expedition Owner Guide 1st Printing (Spanish) - Page 601

Driving • 4H (4X4 HIGH) provides mechanically locked four-wheel drive power to front and rear wheels. The "4X4" light will illuminate in the instrument cluster when this position is selected. This position is not recommended for use on dry pavement. This position is only intended for severe winter or off-road conditions, such as deep snow, ice or shallow sand. • 4L (4X4 LOW) provides mechanically locked four-wheel drive when extra power at reduced speeds is required. The "4X4 LOW" light will illuminate in the instrument cluster when this position is selected. This position is not recommended for use on dry pavement. Use this position for off-road low-speed operation or when extra power is required, such as climbing steep grades, going through deep sand or pulling a boat out of the water. Note: If your vehicle is equipped with AdvanceTrac௢, the AdvanceTrac௢ system will automatically turn off the stability enhancement feature when you shift the Control Trac A4WD system into 4L (4X4 LOW). The brake traction enhancement feature will still be enabled. The AdvanceTrac௢ stability enhancement system can be turned off manually by pressing the AdvanceTrac௢ button (refer to AdvanceTrac௢ Stability Enhancement System in this chapter) while operating in 2H, A4WD or 4H while driving in deep sand, very deep snow or more strenuous off-road maneuvers. This will disable the engine management feature, allowing the vehicle to maintain full power and enhanced momentum through the obstacle. Utility and four-wheel drive vehicles are not designed for cornering at speeds as high as passenger cars any more than low-slung sports cars are designed to perform satisfactorily under off-road conditions. Avoid sharp turns or abrupt maneuvers in these vehicles. Note: The Control Trac selector knob should not be changed while the rear wheels are slipping. 226