2008 FORD SUPER DUTY service

Average fuel economy (AFE)
Select this function from the INFO
menu to display your average fuel
economy in miles/gallon or liters/100
km.
If you calculate your average fuel
economy by dividing miles traveled
since last fill-up by gallons of fuel used (multiply liters used by 100, then
divide by kilometers traveled), your figure may be different than
displayed for the following reasons:
•Your vehicle was not perfectly level during fill-up
•Differences in the automatic shut-off points on the fuel pumps at
service stations
•Variations in top-off procedure from one fill-up to another
•Rounding of the displayed values to the nearest 0.1 gallon (liter)
1. Drive the vehicle at least 5 miles (8 km) with the speed control
system engaged to display a stabilized average.
2. Record the highway fuel economy for future reference.
It is important to press the RESET control after setting the speed
control to get accurate highway fuel economy readings.
Drive timer (Elapsed travel timer)
Select this function from the INFO
menu to display a timer.
To operate the Trip Elapsed Drive
Time perform the following:
1. Press and release RESET in order
to start the timer.
2. Press and release RESET to pause the timer.
3. Press and hold RESET for 2 seconds in order to reset the timer.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Driver Controls
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•Replace slip resistance tape (serviceable item) if worn out.
•Replace handle molding (serviceable item) if damaged.
•Do not tow with grab handle or step frame.
Bed extender (if equipped)
Your vehicle may be equipped with a cargo management feature in the
truck bed.
Note:This feature is not intended for off-road usage.
To open the bed extender into Tailgate Mode:
1. Pull the locking pin toward the
center of the vehicle.
2. Rotate the storage hinge rearward
to unlatch the panels.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Driver Controls
133

The lamps will automatically turn off:
•if the ignition switch is turned to the 3 (ON) position, or
•the Remote Keyless Entry Transmitter lock control is pressed, or
•the vehicle is locked using the keyless entry keypad (if equipped), or
•after 25 seconds of illumination.
Note:On some vehicles, the perimeter lamps illuminated entry feature
will not activate in daylight conditions.
Deactivating/activating perimeter lamps illuminated entry
You may enable/disable this feature by having your vehicle serviced by
your authorized dealer.
You may also perform the following power door lock sequence to
enable/disable the perimeter lamps feature.Note:Before starting, ensure
the ignition is in the 1 (OFF/LOCK) position and all vehicle doors are
closed.
You must complete Steps 1–5 within 30 seconds or the procedure will
have to be repeated. If the procedure needs to be repeated, wait a
minimum of 30 seconds before beginning again.
1. Place the key in the ignition and turn the ignition to the 3 (ON)
position.
2. Press the power door unlock
control on the door panel three
times.
3. Turn the ignition from the 3 (ON)
position to the 1 (OFF/LOCK)
position.
4. Press the power door unlock
control on the door panel three
times.
5. Turn the ignition back to the 3 (ON) position. The horn will chirp one
time to confirm programming mode has been entered and is active.
6. Press the power door unlock control twice within 5 seconds.
Note:The horn will chirp once to indicate the perimeter lighting feature
has been deactivated. The horn will chirp once and honk once (one short
and one long) to indicate the perimeter lighting feature has been
activated.
7. Turn the ignition to the 1 (OFF/LOCK) position to exit the procedure.
Note:The horn will chirp once to confirm the procedure is complete.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Locks and Security
145

Do not attempt to service, repair, or modify the airbag
supplemental restraint systems or its fuses. See your authorized
dealer.
The front passenger air bag is not designed to offer protection to
an occupant in the center front seating position.
Modifying or adding equipment to the front end of the vehicle
(including frame, bumper, front end body structure and tow
hooks) may affect the performance of the airbag system, increasing the
risk of injury. Do not modify the front end of the vehicle.
Additional equipment such as snowplow equipment may effect
the performance of the airbag sensors increasing the risk of
injury. Please refer to theFord Truck Body Builders Layout Bookfor
instructions about the appropriate installation of additional equipment.
Removing the blocker beam without installing snow plow
attachment hardware may effect airbag deployment in a crash.
Do not operate the truck unless either the blocker beam or snow plow
attachment hardware is installed on the vehicle.
Children and airbags
For additional important safety information, read all information on
safety restraints in this guide.
Children must always be properly restrained. Failure to follow these
instructions may increase the risk of injury in a collision.
An infant in a rear-facing seat faces a high risk of serious or fatal
injuries from a deploying passenger airbag. Rear facing infant
seats should NEVER be placed in the front seats, unless the passenger
airbag is turned off. SeePassenger airbag ON/OFF switch.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Seating and Safety Restraints
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If the air bag has deployed,the air bag will not function
again and must be replaced immediately.If the air bag is not
replaced, the unrepaired area will increase the risk of injury in a
collision.
The SRS consists of:
•driver and passenger airbag modules (which include the inflators and
airbags),
•one or more impact and safing sensors,
•a readiness light and tone
•and the electrical wiring which connects the components.
The diagnostic module monitors its own internal circuits and the
supplemental airbag electrical system wiring (including the impact
sensors), the system wiring, the airbag system readiness light, the airbag
back up power and the airbag ignitors.
Determining if the system is operational
The SRS uses a readiness light in the instrument cluster or a tone to
indicate the condition of the system. Refer toAirbag readinesssection
in theInstrument Clusterchapter. Routine maintenance of the airbag is
not required.
A difficulty with the system is indicated by one or more of the following:
•The readiness light will either
flash or stay lit.
•The readiness light will not
illuminate immediately after
ignition is turned on.
•A series of five beeps will be heard. The tone pattern will repeat
periodically until the problem and/or light are repaired.
If any of these things happen, even intermittently, have the SRS serviced
at your authorized dealer immediately. Unless serviced, the system may
not function properly in the event of a collision.
Disposal of airbags and airbag equipped vehicles
See your local authorized dealer. Airbags MUST BE disposed of by
qualified personnel.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Seating and Safety Restraints
175

Passenger airbag ON/OFF switch (if equipped)
An airbag ON/OFF switch
has been installed in this
vehicle. Before driving,always
look at the face of the switch to
be sure the switch is in the proper
position in accordance with these
instructions and warnings. Failure
to put the switch in a proper
position can increase the risk of
serious injury or death in a
collision.
Turning the passenger airbag off
1. Insert the ignition key, turn the
switch to OFF position and hold in
OFF position while removing the
key.
2. When the ignition is turned to the
ON position the OFF light
illuminates briefly, momentarily
shuts off and then turns back on.
This indicates that the passenger
airbag is deactivated.
If the light fails to illuminate when the passenger air bag switch
is in the OFF position and the ignition switch is in ON, have the
passenger air bag switch serviced at your authorized dealer
immediately.
In order to avoid inadvertent activation of the switch, always
remove the ignition key from the passenger air bag ON/OFF
switch.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Seating and Safety Restraints
176

An infant in a rear-facing seat faces a high risk of serious or fatal
injuries from a deploying passenger airbag. Rear facing infant
seats should NEVER be placed in the front seats, unless the passenger
airbag is turned off.
Turning the passenger airbag back on
The passenger airbag remains OFF until you turn it back ON.
1. Insert the ignition key and turn
the switch to ON.
2. The OFF light will briefly
illuminate when the ignition is
turned to On. This indicates that the
passenger airbag is operational.
If the OFF light is illuminated when the passenger airbag switch
is in the ON position and the ignition switch is in ON, have the
passenger airbag switch serviced at your authorized dealer
immediately.
The passenger side airbag should always be ON (the airbag OFF light
shouldnotbe illuminated) unless the passenger is a person who meets
the requirements stated either in Category 1, 2 or 3 of the
NHTSA/Transport Canada deactivation criteria which follows.
The safety belts for the driver and right front passenger seating
positions have been specifically designed to function together
with the airbags in certain types of crashes. When you turn OFF your
airbag, you not only lose the protection of the airbag, you also may
reduce the effectiveness of your safety belt system, which was
designed to work with the airbag. If you are not a person who meets
the requirements stated in the NHTSA/Transport Canada deactivation
criteria turning OFF the airbag can increase the risk of serious injury
or death in a collision.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Seating and Safety Restraints
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government test course. For example, a tire graded 150 would wear one
and one-half (112) times as well on the government course as a tire
graded 100. The relative performance of tires depends upon the actual
conditions of their use, however, and may depart significantly from the
norm due to variations in driving habits, service practices, and
differences in road characteristics and climate.
Traction AA A B C
The traction grades, from highest to lowest are AA, A, B, and C. The
grades represent the tire’s ability to stop on wet pavement as measured
under controlled conditions on specified government test surfaces of
asphalt and concrete. A tire marked C may have poor traction
performance.
The traction grade assigned to this tire is based on
straight-ahead braking traction tests, and does not include
acceleration, cornering, hydroplaning or peak traction characteristics.
Temperature A B C
The temperature grades are A (the highest), B and C, representing the
tire’s resistance to the generation of heat and its ability to dissipate heat
when tested under controlled conditions on a specified indoor laboratory
test wheel. Sustained high temperature can cause the material of the tire
to degenerate and reduce tire life, and excessive temperature can lead to
sudden tire failure. The grade C corresponds to a level of performance
which all passenger car tires must meet under the Federal Motor Vehicle
Safety Standard No. 109. Grades B and A represent higher levels of
performance on the laboratory test wheel than the minimum required by
law.
The temperature grade for this tire is established for a tire that
is properly inflated and not overloaded. Excessive speed,
underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
TIRES
Tires are designed to give many thousands of miles of service, but they
must be maintained in order to get the maximum benefit from them.
Glossary of tire terminology
•Tire Label:A label showing the OE (Original Equipment) tire sizes,
recommended inflation pressure and the maximum weight the vehicle
can carry.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Tires, Wheels and Loading
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