2008 FORD SUPER DUTY tow

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse Panel
Description
35 10A Reverse Sensing System (RSS), 4x4
module, 4x4 solenoid, Traction control
switch, Tow/Haul switch (Diesel engine)
36 5A Passive Anti-Theft System (PATS)
transceiver, Cluster control
37 10A Dual automatic or Manual climate control,
PTC control
38 20A Subwoofer
39 20A Radio
40 20A 4x4 module, Satellite radio module
41 15A Radio, Electrochromatic rear view mirror,
Lock switch illumination
42 10A Heated seat relay coil, Upfitter switch
relay coils, Heated mirror relay coil
43 10A Fuel tank selector switch, 4x4 module
44 10A Run/Start customer access feed (PTO)
45 5A Front wiper logic, Blower motor relay coil
46 7.5A Not used (spare)
47 30A Circuit
BreakerPower windows, Moonroof, Power Sliding
Backlite
48 Relay Delayed accessory
Power distribution box
The power distribution box is located in the engine compartment. The
power distribution box contains high-current fuses that protect your
vehicle’s main electrical systems from overloads.
Always disconnect the battery before servicing high current
fuses.
To reduce risk of electrical shock, always replace the cover to
the Power Distribution Box before reconnecting the battery or
refilling fluid reservoirs.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
273

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
39 50A* ECM power (Diesel engine)
40 30A* Starter relay
41 20A* Power point (Center console - Front)
42 30A* Trailer park lamp relay
43 20A* Power point (Center console - Rear)
44 30A* Trailer battery charge relay
45 30A* Driver power seat or Memory module
46 40A* Run/Start relay
47 50A* GPCM #2 (Diesel engine only)
48 30A* ESOF relay hi-lo
49 30A* Wiper motor
50 30A* PCM relay coil, PCM relay (Gasoline
engines only)
51 — Not used
52 — Not used
53 Relay PCM power bus (Fuses 68, 70, 72, 74, 76)
(Diesel engine only)
54 Relay Starter solenoid
55 Relay Trailer tow park lamps
56 Relay Trailer tow battery charge
57 Relay Power Distribution Box (PDB) bus (fuses
67, 69, 71, 73, 75, 77)
SJB Run /Start bus (Fuses 29–37, 46)
58 Relay ESOF hi-lo
59 Relay PCM power bus (Fuses 68, 70, 72, 74, 76)
(Gasoline engines only)
60 Diode Starter relay (Gasoline engines only)
61 Diode A/C clutch
62 Diode Fuel pump
63 15A** Trailer tow back-up lamps
64 5A** Mirror marker lamps
65 — Not used
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
276

•Winter weather driving capability
•Wet weather driving capability
It is not recommended that the vehicle be operated in 4WD modes with
a temporary emergency spare tire. If 4WD operation is necessary, do not
operate above speeds of 10 mph (16 km/h) or for distances above
50 miles (80 km).
3.Full-size dissimilar spare without label on wheel
When driving with the full-size dissimilar spare tire/wheel,do not:
•Exceed 70 mph (113 km/h)
•Use more than one dissimilar spare tire/wheel at a time
•Use commercial car washing equipment
•Use snow chains on the end of the vehicle with the dissimilar spare
tire/wheel
The usage of a full-size dissimilar spare tire/wheel can lead to
impairment of the following:
•Handling, stability and braking performance
•Comfort and noise
•Ground clearance and parking at curbs
•Winter weather driving capability
•Wet weather driving capability
•All-Wheel driving capability (if applicable)
•Load leveling adjustment (if applicable)
When driving with the full-size dissimilar spare tire/wheel additional
caution should be given to:
•Towing a trailer
•Driving vehicles equipped with a camper body
•Driving vehicles with a load on the cargo rack
Drive cautiously when using a full-size dissimilar spare tire/wheel and
seek service as soon as possible.
Stopping and securing the vehicle
To help prevent the vehicle from moving when you change a tire,
be sure the parking brake is set, then block (in both directions)
the wheel that is diagonally opposite to the tire being changed.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
279

3. Fully insert the jack handle (with
one extension) through the bumper
hole and into the guide tube. The
key and lock will engage with a
slight push and counterclockwise
turn. Some resistance will be felt
when turning the jack handle
assembly.
4. Turn the handle counterclockwise
and lower the spare tire until you
can slide the tire rearward and the
cable is slack.
5. Remove the retainer through the center of the wheel.
Tire change procedure
1. Turn engine off and block the
wheel that is diagonally opposite of
the flat tire using the wheel chock,
if equipped.If the vehicle is a
4x4,lock the manual hub on the
wheel.
2. Remove the jack, jack handle, lug wrench and spare tire from the
stowage locations.
3. Use the tip of the lug wrench to remove any wheel trim.
4. Loosen each wheel lug nut one-half turn counterclockwise but do not
remove them until the wheel is raised off the ground.
When one of the rear wheels is off the ground, the transmission
alone will not prevent the vehicle from moving or slipping off the
jack, even if the transmission is in P (Park) (automatic transmission)
or R (Reverse) (manual transmission). To help prevent the vehicle
from moving when you change the tire, be sure that the parking brake
is set and the diagonally opposite wheel is blocked.
If the vehicle slips off the jack, you or someone else could be
seriously injured.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
282

The following steps apply to all vehicles:
18. Remove the jack and fully
tighten the lug nuts in the order
shown. Refer toWheel lug nut
torque specificationslater in this
chapter for the proper lug nut
torque specification.
8–lug nut torque sequence
10–lug nut torque sequence
19. Stow the flat tire. Refer toStowing the flat/spare tireif the vehicle
is equipped with a spare tire carrier.
Note:Do not stow the Harley-Davidson flat tire and wheel using the
spare tire winch mechanism; store the flat in the bed of the truck.
20. Stow the jack, jack handle and lug wrench. Make sure the jack is
securely fastened so it does not rattle when driving.
21. Unblock the wheels.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
288

Stowing the flat/spare tire
Note:Failure to follow spare tire stowage instructions may result in
failure of cable or loss of spare tire.
1. Lay the tire on the ground with the valve stem facing in the direction
specified on the Tire Changing Instructions located in the glove box.
2. Slide the wheel partially under the vehicle and install the retainer
through the wheel center. Pull on the cable to align the components at
the end of the cable.
3. Turn the jack handle clockwise until the tire is raised to its stowed
position underneath the vehicle. The effort to turn the jack handle
increases significantly and the spare tire carrier ratchets or slips when
the tire is raised to the maximum tightness. Tighten to the best of your
ability, to the point where the ratchet/slip occurs, if possible. The spare
tire carrier will not allow you to overtighten. If the spare tire carrier
ratchets or slips with little effort, take the vehicle to your authorized
dealer for assistance at your earliest convenience.
4. Check that the tire lies flat against the frame and is properly
tightened. Try to push or pull, then turn the tire to be sure it will not
move. Loosen and retighten, if necessary. Failure to properly stow the
spare tire may result in failure of the winch cable and loss of the tire.
5. Repeat this tightness check procedure when servicing the spare tire
pressure (every six months, perscheduled maintenance information),
or at any time that the spare tire is disturbed through service of other
components.
6. If removed, install the spare tire lock (if equipped) into the bumper
drive tube with the spare tire lock key (if equipped) and jack handle.
WHEEL LUG NUT TORQUE SPECIFICATIONS
On vehicles equipped with single rear wheels, retighten the lug nuts to
the specified torque at 500 miles (800 km) after any wheel disturbance
(tire rotation, changing a flat tire, wheel removal, etc.).
On vehicles equipped with dual rear wheels, retighten the wheel lug nuts
to the specified torque at 100 miles (160 km), and again at 500 miles
(800 km) of new vehicle operation and after any wheel disturbance (tire
rotation, changing a flat tire, wheel removal, etc.).
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
289

WRECKER TOWING
If you need to have your vehicle towed, contact a professional towing
service or, if you are a member of a roadside assistance program, your
roadside assistance service provider.
On 4x2 vehicles, it is acceptable to tow the vehicle with the front wheels
on the ground and the rear wheels off the ground using a wheel lift
On 4x4 vehicles, it is recommended that your vehicle be towed using
flatbed equipment with all the wheels off the ground. However, a wheel
lift may be used to lift the rear of the vehicle so long as, depending on
vehicle configurations, the following preparations are met:
•On Electronic Shift-On-the-Fly (ESOF) vehicles, the 4x4 control is
turned to the 2WD position prior to towing.
•On manual-shift transfer case vehicles, the front wheel hub locks are
in the FREE position prior to towing.
Note:Towing an ESOF 4x4 vehicle with the front wheels on the ground
without disengaging the front hubs may cause damage to the automatic
transmission.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
296

Note:Towing an a 4x2 or an ESOF 4x4 vehicle with the rear wheels on
the ground for more than 50 miles (80 km) and/or in excess of 35 mph
(56 km/h) may cause damage to the automatic transmission.
Note:On Dual Rear Wheel (DRW) vehicles, an outer rear wheel must be
removed prior to using a wheel lift wrecker.
If the vehicle is towed by other means or incorrectly, vehicle
damage may occur.
Ford Motor Company produces a towing manual for all authorized tow
truck operators. Have your tow truck operator refer to this manual for
proper hook-up and towing procedures for your vehicle.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
297