
Child booster seats
The belt-positioning booster (booster seat) is used to improve the fit of
the vehicle safety belt. Children outgrow a typical child seat (e.g.,
convertible or toddler seat) when they weigh about 40 lb (18 kg) and are
around four (4) years of age. Consult your child safety seat owner guide
for the weight, height, and age limits specific to your child safety seat.
Keep your child in the child safety seat if it properly fits the child,
remains appropriate for their weight, height and age AND if properly
secured to the vehicle.
Although the lap/shoulder belt will provide some protection, children
who have outgrown a typical child seat are still too small for lap/shoulder
belts to fit properly, and wearing an improperly fitted vehicle safety belt
could increase the risk of serious injury in a crash. To improve the fit of
both the lap and shoulder belt on children who have outgrown child
safety seats, Ford Motor Company recommends use of a belt-positioning
booster.
Booster seats position a child so that vehicle lap/shoulder safety belts fit
better. They lift the child up so that the lap belt rests low across the hips
and the knees bend comfortably at the edge of the cushion, while
minimizing slouching. Booster seats may also make the shoulder belt fit
better and more comfortably. Try to keep the belt near the middle of the
shoulder and across the center of the chest. Moving the child closer (a
few centimeters or inches) to the center of the vehicle, but remaining in
the same seating position, may help provide a good shoulder belt fit.
When children should use booster seats
Children need to use booster seats from the time they outgrow the
toddler seat until they are big enough for the vehicle seat and
lap/shoulder belt to fit properly. Generally this is when they reach a
height of at least 4 feet 9 inches (1.45 meters) tall (around age eight to
age twelve and between 40 lb (18 kg) and 80 lb (36 kg) or upward to
100 lb (45 kg) if recommended by your child restraint manufacturer).
Many state and provincial laws require that children use approved
booster seats until they reach age eight, a height of 4 feet 9 inches
(1.45 meters) tall, or 80 lb (36 kg).
Seating and Safety Restraints
211
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)

Booster seats should be used until you can answer YES to ALL of these
questions when seated without a booster seat:
•Can the child sit all the way back
against the vehicle seat back with
knees bent comfortably at the
edge of the seat cushion?
•Can the child sit without
slouching?
•Does the lap belt rest low across
the hips?
•Is the shoulder belt centered on the shoulder and chest?
•Can the child stay seated like this for the whole trip?
Types of booster seats
There are generally two types of belt-positioning booster seats: backless
and high back. Always use booster seats in conjunction with the vehicle
lap/shoulder belt.
•Backless booster seats
If your backless booster seat has a
removable shield, remove the
shield. If a vehicle seating position
has a low seat back or no head
restraint, a backless booster seat
may place your child’s head (as
measured at the tops of the ears)
above the top of the seat. In this
case, move the backless booster
to another seating position with a
higher seat back or head restraint and lap/shoulder belts, or consider
using a high back booster seat.
•High back booster seats
If, with a backless booster seat,
you cannot find a seating position
that adequately supports your
child’s head, a high back booster
seat would be a better choice.
Seating and Safety Restraints
212
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)

Children and booster seats vary in size and shape. Choose a booster that
keeps the lap belt low and snug across the hips, never up across the
stomach, and lets you adjust the shoulder belt to cross the chest and
rest snugly near the center of the shoulder. The drawings below compare
the ideal fit (center) to a shoulder belt uncomfortably close to the neck
and a shoulder belt that could slip off the shoulder. The drawings below
also show how the lap belt should be low and snug across the child’s
hips.
If the booster seat slides on the vehicle seat, placing a rubberized mesh
sold as shelf or carpet liner under the booster seat may improve this
condition. Do not introduce any item thicker than this under the booster
seat. Check with the booster seat manufacturer’s instructions.
The importance of shoulder belts
Using a booster without a shoulder belt increases the risk of a child’s
head hitting a hard surface in a collision. For this reason, you should
never use a booster seat with a lap belt only. It is generally best to use a
booster seat with lap/shoulder belts in the back seat.
Move a child to a different seating location if the shoulder belt does not
stay positioned on the shoulder during use.
Seating and Safety Restraints
213
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)

Follow all instructions provided by the manufacturer of the booster seat.
WARNING:Never place, or allow a child to place, the shoulder
belt under a child’s arm or behind the back because it reduces
the protection for the upper part of the body and may increase the risk
of injury or death in a collision.
Child restraint and safety belt maintenance
Inspect the vehicle safety belts and child safety seat systems periodically
to make sure they work properly and are not damaged. Inspect the
vehicle and child seat safety belts to make sure there are no nicks, tears
or cuts. Replace if necessary. All vehicle safety belt assemblies, including
retractors, buckles, front safety belt buckle assemblies, buckle support
assemblies (slide bar-if equipped), shoulder belt height adjusters (if
equipped), shoulder belt guide on seatback (if equipped), child safety
seat LATCH and tether anchors, and attaching hardware, should be
inspected after a collision. Refer to the child restraint manufacturer’s
instructions for additional inspection and maintenance information
specific to the child restraint. Ford Motor Company recommends that all
safety belt assemblies in use in vehicles involved in a collision be
replaced. However, if the collision was minor and an authorized dealer
finds that the belts do not show damage and continue to operate
properly, they do not need to be replaced. Safety belt assemblies not in
use during a collision should also be inspected and replaced if either
damage or improper operation is noted.
For proper care of soiled safety belts, refer toInteriorin theCleaning
chapter.
WARNING:Failure to inspect and if necessary replace the
safety belt assembly or child restraint system under the above
conditions could result in severe personal injuries in the event of a
collision.
Seating and Safety Restraints
214
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)

NOTICE TO UTILITY VEHICLE AND TRUCK OWNERS
Utility vehicles and trucks handle
differently than passenger cars in
the various driving conditions that
are encountered on streets,
highways and off-road. Utility
vehicles and trucks 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.
WARNING:Utility vehicles have a significantly higher rollover
rate than other types of vehicles. To reduce the risk of serious
injury or death from a rollover or other crash you must:
•Avoid sharp turns and abrupt maneuvers;
•Drive at safe speeds for the conditions;
•Keep tires properly inflated;
•Never overload or improperly load your vehicle; and
•Make sure every passenger is properly restrained.
WARNING:In a rollover crash, an unbelted person is
significantly more likely to die than a person wearing a seat belt.
All occupants must wear seat belts and children/infants must use
appropriate restraints to minimize the risk of injury or ejection.
Study your owner’s guide and any supplements for specific information
about equipment features, instructions for safe driving and additional
precautions to reduce the risk of an accident or serious injury.
Tires, Wheels and Loading
215
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)

A
Accessory delay ........................126
Air cleaner filter ...............388–389
Air conditioning ........................102
Airbag supplemental restraint
system ........................................184
and child safety seats ............186
description ..............................184
disposal ....................................188
driver airbag ............................186
indicator light .........................188
operation .................................186
passenger airbag .....................186
passenger deactivation
switch ......................................189
Ambulance packages ....................7
Antifreeze
(see Engine coolant) ................364
Anti-lock brake system
(see Brakes) ......................268–269
Anti-theft system ..............159, 162
arming the system ..........160, 162
disarming a triggered
system .....................................162
triggering .................................162
Audio system
(see Radio) ......................43, 45, 52
Automatic transmission ............275
driving an automatic
overdrive .................................275
fluid, adding ............................383
fluid, checking ........................383
fluid, refill capacities ..............390
Auxiliary Input Jack ...................59
Auxiliary power point ...............124
Axle
refill capacities ........................390B
Battery .......................................362
acid, treating emergencies .....362
jumping a disabled battery ....330
maintenance-free ....................362
replacement, specifications ...389
servicing ..................................362
Bed extender ............................145
Belt-Minder.............................180
Booster seats .............................211
Brakes ........................................268
anti-lock ...........................268–269
anti-lock brake system (ABS)
warning light ...........................268
fluid, checking and adding ....382
fluid, refill capacities ..............390
parking ....................................269
shift interlock ..........................273
trailer .......................................255
Bulbs ..........................................113
C
Capacities for refilling fluids ....390
Cassette tape player ...................43
Cell phone use ............................10
Child safety seats ......................198
attaching with tether straps ..206
in front seat ....................199, 202
in rear seat ..............199, 202, 206
LATCH .....................................206
Child safety seats - booster
seats ...........................................211
Cleaning your vehicle
engine compartment ..............346
instrument panel ............348–349
interior .....................................349
plastic parts ............................347
Index
402
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)

Instrument panel
cleaning ...........................348–349
cluster ........................................14
lighting up panel and
interior .....................................109
J
Jump-starting your vehicle ......330
K
Keyless entry system
autolock ...................................149
keypad .....................................157
locking and unlocking doors ..159
programming entry code .......157
Keys ...................................160–161
positions of the ignition .........263
L
Lamps
autolamp system .....................107
daytime running light .............108
fog lamps .................................107
headlamps ...............................107
headlamps, flash to pass ........108
instrument panel, dimming ...109
interior lamps .........................113
replacing bulbs ...............115–119
LATCH anchors .........................206
Lights, warning and indicator ....14
anti-lock brakes (ABS) ..........268
Limited-slip axle .......................272
Load limits .................................243
Loading instructions .................250
Locks
autolock ...................................149
childproof ................................152doors ........................................148
Lug nuts ....................................329
Lumbar support, seats .....167–168
M
Manual transmission .................278
fluid capacities ........................390
reverse .....................................279
Message center .....................25, 33
english/metric button .........28, 37
system check button ................37
warning messages ...............28, 38
Mirrors ...............................126–127
automatic dimming rearview
mirror ......................................126
fold away .........................128–130
side view mirrors (power) .....127
signal .......................................130
Moon roof ..................................138
Motorcraftparts ..............370, 389
N
Navigation system .......................97
O
Octane rating ............................374
Oil (see Engine oil) ..................359
P
Parking brake ............................269
Parts
(see Motorcraftparts) ...........389
Pedals (see Power adjustable
foot pedals) ...............................131
Power adjustable foot pedals ...131
Index
405
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)

Power distribution box
(see Fuses) ...............................310
Power door locks ......................148
Power mirrors ...........................127
Power point ...............................124
Power steering ..........................271
fluid, checking and adding ....381
fluid, refill capacity ................390
Power Windows .........................124
Preparing to drive your
vehicle ........................................273
R
Radio ................................43, 45, 52
Rear seat entertainment
system ..........................................68
Rear-view camera system .........282
Relays ........................................305
Remote entry system ...............152
illuminated entry ....................157
locking/unlocking
doors ................................148, 153
replacing the batteries ...........155
Reverse sensing system ...........280
Roadside assistance ..................302
S
Safety belts
(see Safety restraints) .....172–177
Safety defects, reporting ..........343
Safety restraints ................172–177
Belt-Minder...........................180
extension assembly ................183
for adults .........................173–177
for children .............................194lap belt ....................................179
warning light and
chime ...............................179–180
Safety restraints - LATCH
anchors ......................................206
Safety seats for children ..........198
Safety Compliance
Certification Label ....................395
Satellite Radio Information ........65
Seats ..........................................163
child safety seats ....................198
cleaning ...................................351
heated ......................................102
memory seat ...................154, 168
SecuriCode keyless entry
system ........................................157
SecuriLock passive
anti-theft system ...............159, 161
Servicing your vehicle ..............354
Setting the clock
AM/FM/CD .................................47
AM/FM/In-dash 6 CD ................54
Snowplowing .................7, 299–300
SOS Post Crash Alert ...............188
Spark plugs,
specifications .....................389, 394
Special notice ................................7
ambulance conversions ..............7
diesel-powered vehicles .............6
four-wheel drive vehicles .......301
utility-type vehicles ....................6
Speed control ............................131
Starting your vehicle ........263–265
jump starting ..........................330
Steering wheel
controls ....................................134
tilting .......................................121
Index
406
2010 F-250/350/450/550(f23)
Owners Guide, 1st Printing
USA(fus)