2011 Ford F150 Regular Cab Owner Guide 3rd Printing - Page 318

Driving Activating the electronic locking differential (ELD) The ELD can be turned on by pulling the knob on the 4WD control toward you while the control is in either 4H (4X4 high) or 4L (4X4 low) mode. Once the knob is pulled, the light located on the control will blink for approximately two seconds and then it will remain solid. The indicator light will also display in the message center. light on the control Once the indicator remains solid and the light is displayed in the message center, both rear wheel axle shafts will be locked together providing added traction. If the light blinks for 10 seconds, then turns off, and the indicator light in the message center turns off, one of the following has occurred: • The vehicle speed is too high. • The left and right rear wheel speed difference is too high during an engagement attempt. • The system has malfunctioned and will be accompanied by a CHECK LOCKING DIFFERENTIAL message in the message center. Note: If the ELD has difficulty disengaging, release the accelerator pedal and turn the steering wheel in the opposite direction while rolling. Driving off-road with truck and utility vehicles 4WD vehicles are specially equipped for driving on sand, snow, mud and rough terrain and have operating characteristics that are somewhat different from conventional vehicles, both on and off the road. Your vehicle may be equipped with a front air dam that can become damaged (due to reduced ground clearance) when taking your vehicle off-road. This air dam can be taken off by removing two bolts. For vehicles equipped with a 3.5L Ecoboost™ engine: Your vehicle is equipped with an underbody transmission shield and brackets that may become damaged (due to reduced ground clearance) 318 2011 F-150 (f12) Owners Guide, 3rd Printing USA (fus)