2008 FORD SUPER DUTY ABS

Anti-lock brake system:If the
ABS light stays illuminated or
continues to flash, a malfunction has
been detected, have the system
serviced immediately by your
authorized dealer. Normal braking is still functional unless the brake
warning light also is illuminated.
Airbag readiness:If this light fails
to illuminate when ignition is turned
to RUN, continues to flash or
remains on, have the system
serviced immediately by your authorized dealer. A chime will also sound
when a malfunction in the supplemental restraint system has been
detected.
Safety belt:Reminds you to fasten
your safety belt. A BeltMinder

chime will also sound to remind you
to fasten your safety belt. Refer to
theSeating and Safety Restraints
chapter to activate/deactivate the BeltMinder
chime feature.
Engine oil pressure:Illuminates
when the oil pressure falls below the
normal range. Refer toEngine oil
in theMaintenance and
Specificationschapter.
Charging system:Illuminates when
the battery is not charging properly.
Powertrain malfunction/Reduced
power/Electronic throttle
control (RTT):Displays when the
engine has defaulted to a
“limp-home” operation or when a
transmission problem has been
detected and shifting may be restricted. If the light remains on, have the
system serviced immediately by your authorized dealer.
ABS
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Instrument Cluster
14

Function Number of
bulbsTrade number
Sidemarker 2 194
Tail/stop/turn/sidemarker
(Pick-up only)2 4157K or 3157
Tail/stop/turn/sidemarker
(Chassis cabs only)2 3157
Back-up (Pick-ups only) 2 3156 or 3156K
Back-up (Chassis cabs only) 2 3157
High-mount stoplamp 1 906
Foglamp 2 9145
License plate lamp 2 194
Cargo lamp 2 906
Mirror turn signal 2 2825
Mirror clearance lamp 2 2825
Front clearance lamps (2) and
Front identification lamps (3)5 194
Rear fender clearance* 4 W5W
Interior visor lamp (if equipped) 4 194
Rear identification 3 194
All replacement bulbs are clear in color except where noted.
To replace all instrument panel lights - see your authorized dealer
* Dual rear wheels, or if equipped.
Replacing headlamp bulbs (aerodynamic)
1. Make sure that the headlamp control is in the OFF position and open
the hood.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Lights
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Replacing brake/tail/turn/back-up lamp bulbs - Pick-ups only
1. Make sure the headlamp switch is
in the OFF position and then open
the tailgate to expose the lamp
assemblies.
2. Remove the two bolts from the
tail lamp assembly and carefully pull
the lamp assembly from the tailgate
pillar by releasing the two retaining
tabs.
3. Rotate the bulb socket counterclockwise and remove from lamp
assembly.
4. Pull the bulb straight out of the socket.
Install the new bulb(s) in reverse order.
Replacing brake/tail/turn/back-up lamp bulbs - Chassis cabs only
1. Make sure the headlamp switch is
in the OFF position.
2. Remove the four screws and the
lamp lens from lamp assembly.
3. Carefully pull the bulb straight
out of the socket and push in the
new bulb.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Lights
91

PARK BRAKE ENGAGEDDisplayed when the parking brake is applied
(or not fully released).
CHECK BRAKE SYSTEMDisplayed when a fault has been detected by
the ABS module.
TRAILER FAULT (if equipped):Displayed if there is a short circuit on
the electric brake output wire or the trailer brakes are drawing too much
current. Refer toIntegrated trailer brake controllerin theTires,
Wheels and Loadingchapter for more information.
TBC FAULT (if equipped):Displayed in response to faults sensed by
the trailer brake controller (TBC). In the event this message is seen,
please take your vehicle to an authorized dealer for diagnosis and repair.
Refer toIntegrated trailer brake controllerin theTires, Wheels and
Loadingchapter for more information.
TRAILER DISCONNECTED (if equipped):Displayed when a trailer
connection becomes disconnected, either intentionally or unintentionally,
and has been sensed during a given ignition cycle. Refer toIntegrated
trailer brake controllerin theTires, Wheels and Loadingchapter for
more information.
CHECK AIR FILTER (Diesel engine only):Refer toInstrument
Clusterin your6.0/6.4 Liter Power Stroke Direct Injection Turbo
Diesel Owner’s Guide Supplement.
LOW BRAKE FLUID LEVELIndicates the brake fluid level is low and
the brake system should be inspected immediately. Refer toBrake fluid
in theMaintenance and Specificationschapter.
DRAIN WATER SEPARATOR (Diesel engine only)Displayed when
the water separator has reached a predetermined capacity and needs to
be drained. Refer to your6.0/6.4 Liter Power Stroke Direct Injection
Turbo Diesel Owner’s Guide Supplementfor more information.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Driver Controls
121

Warning messages that have been reset are divided into two categories:
•They will reappear on the display ten minutes from the reset.
•They will not reappear until an ignition OFF-RUN cycle has been
completed.
This acts as a reminder that these warning conditions still exist within
the vehicle.
Warning display Status
Park brake engaged Warning returns after
10 minutes if condition
still exists. Check brake system
Driver door ajar Warning returns after
the ignition key is
turned from OFF to
RUN. Passenger door ajar
Rear left door ajar
Rear right door ajar
Low fuel level
Trailer fault (if equipped)
TBC fault (if equipped)
Trailer disconnected (if equipped)
Check air filter (Diesel engine only)
Low brake fluid level
Drain water separator (Diesel engine only)
DRIVER DOOR AJARDisplayed when the driver’s door is not
completely closed.
PASSENGER DOOR AJARDisplayed when the passenger’s door is not
completely closed.
REAR LEFT DOOR AJARDisplayed when the rear left door is not
completely closed.
REAR RIGHT DOOR AJARDisplayed when the rear right door is not
completely closed.
LOW FUEL LEVEL
Displayed as an early reminder of a low fuel condition.
PARK BRAKE ENGAGEDDisplayed when the parking brake is applied
(or not fully released).
CHECK BRAKE SYSTEMDisplayed when a fault has been detected by
the ABS module.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Driver Controls
129

Position the safety belt height adjusters so that the belt rests
across the middle of your shoulder. Failure to adjust the safety
belt properly could reduce the effectiveness of the seat belt and
increase the risk of injury in a collision.
To adjust the shoulder belt height,
push the button and slide the height
adjuster up or down. Release the
button and pull down on the height
adjuster to make sure it is locked in
place.
Center lap and shoulder belt (Regular Cab center seating
position/Super Cab and Crew Cab rear center seating positions)
Always use both the lap and shoulder safety belt in the Regular
Cab center seating position or in the Super Cab/Crew Cab rear
center seating positions.
Regular Cabs with a center 20% seat or Crew Cabs with a rear
60/40 split bench
If you carry large cargo behind the seat or items that might damage or
soil the belt, detach the belt from the seat:
1. Release the mini-buckle by
inserting a key or safety belt tongue
into the slot.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Seating and Safety Restraints
163

Loaded vehicles may handle differently than unloaded vehicles.
Extra precautions, such as slower speeds and increased stopping
distance, should be taken when driving a heavily loaded vehicle.
Your vehicle can haul more cargo and people than most passenger cars.
Depending upon the type and placement of the load, hauling cargo and
people may raise the center of gravity of the vehicle.
TRAILER TOWING
Note:The trailer towing charts in this section apply to vehicles equipped
with gasoline engines; for vehicles equipped with diesel engines, refer to
your6.0/6.4 Liter Power Stroke Direct Injection Turbo Diesel Owner’s
Guide Supplement.
Your vehicle may tow a Conventional/Class IV trailer or fifth wheel trailer
provided the maximum trailer weight is less than or equal to the
maximum trailer weight listed for your engine and rear axle ratio on the
following charts.
To calculate your maximum trailer weight:
For pickup trucks:Take curb weight, hitch hardware and the driver’s
weight, then subtract them from the GCWR listed for your vehicle series,
engine, transmission and drive axle ratio(refer to the chart/table in the
following text). This calculation will give you the maximum trailer
weight possible for your vehicle.
For chassis cabs and pickup trucks with aftermarket equipment:
Weigh your vehicle at a certified scale and subtract this actual curb
weight, hitch hardware, and the driver’s weight from the GCWR listed for
your vehicle series, engine, transmission and drive axle ratio(refer to
the chart/table in the following text). This calculation will give you the
maximum trailer weight possible for your vehicle.
The weight of all additional cargo and passengers must be subtracted
from the maximum trailer weight calculated above.
Further trailer/hitch restrictions and limitations exist depending on the
type of trailer and hitch used. These additional maximum trailer weight
and tongue load limitations are listed in the chart/table that follows the
listing of GCWRs.
Towing a trailer places an additional load on your vehicle’s engine,
transmission, axle, brakes, tires and suspension. Inspect these
components carefully prior to and after any towing operation. Refer to
Transmission fluid temperature gaugein theInstrument Cluster
chapter for the transmission fluid temperature information.
2008 F-250/350/450/550(f23)
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Tires, Wheels and Loading
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•Avoid towing in adverse weather conditions. The TBC does not
provide anti-lock control of the trailer wheels. Trailer wheels can
lock-up on slippery surfaces, resulting in reduced stability of trailer
and tow vehicle.
•The TBC interacts with the brake system of the vehicle, including
ABS, in order to reduce the likelihood of trailer wheel lockup.
Therefore, if these systems are not functioning properly the TBC may
not function at full performance.
•When the vehicle is turned off, the TBC Output is disabled and the
display is shut down. Reactivation of the ignition from 3 (OFF) to 4
(ON) will awaken the TBC module.
•The TBC is only a factory or dealer installed item. Ford is not
responsible for warranty or performance of the TBC due to misuse or
customer installation.
•Do not attempt removal of the TBC without consulting the
Workshop Manual.Damage to the unit may result.
Trailer lamps
Trailer lamps are required on most towed vehicles. Make sure all running
lights, brake lights, turn signals and hazard lights are working. See your
authorized dealer or trailer rental agency for proper instructions and
equipment for hooking up trailer lamps.
Using a step bumper (if equipped)
The rear bumper is equipped with an integral hitch and only requires a
ball with a one inch (25.4 mm) shank diameter. The bumper has a
5,000 lb. (2,270 kg) trailer weight and 500 lb. (227 kg) tongue weight
capacity.
If it is necessary to relocate the trailer hitch ball position, a
frame-mounted trailer hitch must be installed.
Driving while you tow
When towing a trailer:
•Do not drive faster than 70 mph (112 km/h) during the first 500 miles
(800 km) of trailer towing and don’t make full-throttle starts.
•Turn off the speed control. The speed control may shut off
automatically when you are towing on long, steep grades.
•Consult your local motor vehicle speed regulations for towing a trailer.
•To eliminate excessive transmission shifting, activate the Tow/Haul
feature. This will also assist in transmission cooling. (For additional
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
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Tires, Wheels and Loading
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