2009 Ford F250 Owner's Manual - Page 298

Driving The 4WD system: • provides 4x4 High engagement and disengagement while the vehicle is moving. • is operated by a rotary control located on the instrument panel that allows you select 2WD, 4x4 High or 4x4 Low operation. • uses auto-manual hub locks that can be engaged and disengaged automatically based on the 4x4 mode selected. • auto-manual hub locks can be manually overridden by rotating the hub lock control from AUTO to LOCK if desired. • automatic operation of the hub locks is recommended, and will increase fuel economy • For proper operation, make sure that each hub is fully engaged and that both hub locks are set to the same position (both set to LOCK or both set to AUTO). To engage LOCK, turn the hub locks completely clockwise; to engage AUTO, turn the hub locks completely counterclockwise. 4WD system indicator lights The 4WD system indicator lights illuminate only under the following conditions. If these lights illuminate when driving in 2WD, contact your authorized dealer as soon as possible. • 4x4 HIGH - momentarily 4x4 illuminates after the engine is HIGH started. Illuminates when 4H (4x4 High) is engaged. Flashes when shifting into or out of 4H (4x4 high) (ESOF systems only). • 4x4 LOW - momentarily 4x4 illuminates when the ignition is LOW turned to the ON position. Illuminates when 4L (4x4 Low) is engaged. Flashes when shifting into or out of 4L (4x4 Low) or if the range shift conditions are not met (ESOF systems only). 298 2009 F-250/350/450/550 (f23) Owners Guide, 3rd Printing USA (fus)