Page 2 of 400
Locks and Security 146
Keys 146
Locks 146
Anti-theft system 159
Seating and Safety Restraints 162
Seating 162
Safety restraints 170
Airbags 184
Child restraints 192
Tires, Wheels and Loading 204
Tire information 206
Tire inflation 209
Tire Pressure Monitoring System (TPMS) 224
Vehicle loading 236
Trailer towing 242
Trailer brake controller-integrated 246
Recreational towing 253
Driving 255
Starting 255
Brakes 260
Traction Control™ 262
Transmission operation 265
Snowplowing 291
Roadside Emergencies 294
Getting roadside assistance 294
Hazard flasher switch 296
Fuel pump shut-off switch 296
Fuses and relays 297
Changing tires 307
Lug nut torque 321
Jump starting 322
Wrecker towing 327
Table of Contents
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Owners Guide (post-2002-fmt)
USA(fus)
ProCarManuals.com
Page 101 of 400

The auxiliary power point is located
on the instrument panel.
On SuperCab and Crew Cab models,another power point is located
on the rear of the center console (if equipped).
Do not use the power point for operating the cigarette lighter element (if
equipped).
To prevent the fuse from being blown, do not use the power point(s)
over the vehicle capacity of 12 VDC/180W.
To prevent the battery from being discharged, do not use the power
point longer than necessary when the engine is not running.
Always keep the power point caps closed when not being used.
Cigar lighter (if equipped)
Do not plug optional electrical accessories into the cigarette lighter
socket.
Do not hold the lighter in with your hand while it is heating, this will
damage the lighter element and socket. The lighter will be released from
its heating position when it is ready to be used.
Note:If the power point or cigar lighter socket is not working, a fuse
may have blown. Refer to theFuses and relaysin theRoadside
Emergencieschapter information on checking and replacing fuses.
Improper use of the lighter can cause damage not covered by your
warranty.
2008 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Driver Controls
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Page 114 of 400

UPFITTER CONTROLS (IF EQUIPPED)
Your vehicle may be equipped with
the Upfitter option package which
will provide four switches, mounted
in the center of the instrument
panel, labeled AUX 1, AUX 2, AUX 3
and AUX 4. These switches will only
operate while the ignition is in the 3
(ON) position, whether the engine
is running or not. It is, however, recommended that the engine remain
running to maintain battery charge when using the Upfitter switches for
extended duration or higher current draws. (This is even more important
for vehicles with diesel engines since the glow plugs are also draining
battery power when the ignition key is in the 3 [ON] position.)
When switched on by the operator they provide 10 amps, 15 amps or 30
amps of electrical battery power for a variety of personal or commercial
uses.
If your vehicle is equipped with this option, there will also be a relay box
located on the driver side end of the instrument panel. See your
authorized dealer for service.
The relays are coded as shown in
the accompanying illustration.
RELAY
1 RELAY
2 RELAY
3 RELAY
4
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USA(fus)
Driver Controls
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Page 266 of 400

2. Apply the brake. Use a tool (or a
small screwdriver) to pry out the
access cover. Insert the tool into the
access hole and slide the white
override button towards the left.
Move the gear shift lever into N
(Neutral) while holding the white
override disc towards the left.
When the key is in the ignition and in the OFF position, the
automatic transmission shift lever can be moved from the P
(Park) position without the brake pedal depressed. To avoid unwanted
vehicle movement, always set the parking brake.
3. Start the vehicle.
If it is necessary to use the above procedure to move the gearshift lever,
it is possible that a fuse has blown or the vehicle’s brakelamps are not
operating properly. Refer toFuses and relaysin theRoadside
Emergencieschapter.
Do not drive your vehicle until you verify that the brakelamps
are working.
Always set the parking brake fully and make sure the gearshift is
latched in P (Park). Turn the ignition to the LOCK position and
remove the key whenever you leave your vehicle.
If the parking brake is fully released, but the brake warning lamp
remains illuminated, the brakes may not be working properly.
See your authorized dealer as soon as possible.
2008 F-250/350/450/550(f23)
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USA(fus)
Driving
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Page 297 of 400
The switch has a red button on top
of it.
To reset the switch:
1. Turn the ignition off.
2. Check the fuel system for leaks.
3. If no leaks are apparent, reset the switch by pushing in on the reset
button.
4. Turn the ignition on.
5. Wait a few seconds and return the key to off.
6. Make another check for leaks.
FUSES AND RELAYS
Fuses
If electrical components in the
vehicle are not working, a fuse may
have blown. Blown fuses are
identified by a broken wire within
the fuse. Check the appropriate
fuses before replacing any electrical
components.
Note:Always replace a fuse with one that has the specified amperage
rating. Using a fuse with a higher amperage rating can cause severe wire
damage and could start a fire.
15
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USA(fus)
Roadside Emergencies
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The fuses are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
1 30A Not used (spare)
2 15A Not used (spare)
3 15A Family Entertainment System (FES)
4 30A Not used (spare)
5 10A Keypad illumination, Brake-Shift
Interlock (BSI), SPBJB
6 20A Turn signals
7 10A Left headlamp (Low beam)
8 10A Right headlamp (Low beam)
9 15A Interior lighting, Lighted running
boards
10 15A Cargo lamp
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USA(fus)
Roadside Emergencies
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Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
11 10A Not used
12 7.5A Power mirror switch, Driver power
seat (Memory)
13 5A Not used (spare)
14 10A Upfitter relay #3 feed
15 10A Climate control head
16 15A Upfitter Relay #4 Feed
17 20A All lock motor feeds
18 20A Heated seat relay feed
19 25A Not used (spare)
20 15A Adjustable pedals, Datalink
21 15A Fog lamp relay feed, Cornering
lamps
22 15A Park lamp relay feed
23 15A High beam headlight relay feed
24 20A Horn relay feed
25 10A Power telescoping mirror switch
Demand lamps - underhood and
illuminated visor (battery saver)
26 10A Cluster
27 20A Ignition switch feed, Passenger
compartment fuses 28, 42, 43, 44,
and 45, Engine compartment starter
relay coil #57 (Diesel engine),
Accessory shutoff control module (if
equipped) (Diesel engine), Engine
compartment starter relay diode
(gasoline engines)
28 5A Radio
29 5A Not used (spare)
30 5A Not used (spare)
31 10A Compass
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USA(fus)
Roadside Emergencies
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Page 302 of 400

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
32 10A Restraints Control Module (RCM),
Passenger Airbag Deactivation
Indicator
33 10A Trailer tow brake controller, Trailer
tow battery charge relay coil
34 5A Not used (spare)
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 E/C mirror
47 30A Circuit
BreakerPower windows, Moonroof, Power
Sliding Backlite
48 Relay Delayed accessory
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USA(fus)
Roadside Emergencies
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