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Replacing exterior bulbs
Check the operation of all the bulbs frequently.
Function Number of
bulbsTrade number
Headlamps
(aerodynamic)2 H13/9008
Headlamps (sealed beam) 2 H6054
Park lamp with
aerodynamic headlamp2 3157AK or 3157A
Park lamp with sealed
beam headlamp2 4157K/3157
Sidemarker 2 194
Tail/stop/turn/sidemarker 2 4157K/3157
Backup 2 3156K or 3156
High-mount stoplamp 1 922
Foglamp 2 9145
License plate lamp 2 194
Cargo lamp 2 906
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.
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Lights
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Page 56 of 312

Storage compartment (if equipped)
Press the release on the door to
open the storage compartment.
The storage compartment may be
used to secure sunglasses or a
similar object and the front tab can
be used for holding tickets, paper,
envelopes, etc. The front bin may be
used to store small objects.
AUXILIARY POWER POINT (12VDC)
Power outlets are designed for accessory plugs only. Do not insert
any other object in the power outlet for this will damage the
outlet and blow the fuse. Do not hang any type of accessory or
accessory bracket from the plug. Improper use of the power
outlet can cause damage not covered by your warranty.
The auxiliary power point is located
on the instrument panel.
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.
Improper use of the lighter can cause damage not covered by your warranty.
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Driver Controls
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Page 64 of 312

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 4
(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 4 [ON] position.)
When switched on by the operator they provide 10 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
with a fuse located inside the glove
box.
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Driver Controls
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Page 185 of 312

Manual Shift On Stop (MSOS) 4x4 system (if equipped)
The 4WD system is engaged or
disengaged by rotating the control
for both front wheel hub locks from
the FREE or LOCK position, then
manually engaging or disengaging
the transfer case with the
floor-mounted shifter. For increased
fuel economy in 2WD, rotate both
hub locks to the FREE position.
•For proper operation, make
sure that each hub is fully
engaged and that both hub locks are set to the same position
(both set to LOCK or both set to FREE). To engage LOCK,
turn the hub locks completely clockwise; to disengage the hubs
(FREE), turn the hub locks completely counterclockwise.
•Some vehicles may be equipped with wheel ornaments that cover the
4x4 manual hub lock. These ornaments must be removed to access
the manual hub locks.
Electronic Shift On the Fly (ESOF) 4x4 system (if equipped)
If equipped with the electronic shift 4WD System, and the
instrument panel control is moved to 4X4 LOW (4WD Low) while
the vehicle is moving above 3 mph (5 km/h), the system will not
engage and no damage will occur to the 4WD system. Before 4X4
LOW (4WD Low) can be engaged, the vehicle speed must be
below 3 mph (5 km/h) with the brake pedal depressed and the
transmission in N (Neutral). This vehicle is equipped with a
non-synchronous low range gearset which will not allow the
transfer case to shift into 4X4 LOW (4WD Low) if vehicle speed
is above 3 mph (5 km/h). It is recommended that a shift to 4X4
LOW (4WD Low) is performed while the vehicle is moving at a
speed below 3 mph (5 km/h).
The 4WD system:
•provides 4x4 High engagement and disengagement while the vehicle is
moving.
•is operated by a rotary control located on the instrument panel that
allows you select 2WD, 4x4 High or 4x4 Low operation.
•uses auto-manual hub locks that can be engaged and disengaged
automatically based on the 4x4 mode selected.
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
185
Page 207 of 312
To remove a fuse use the fuse puller
tool provided on the fuse panel
cover.
To reinstall the cover, align and
engage the two hooked clips at the
bottom of the cover onto the
instrument panel, then lift the panel
and press the top clips firmly into
place.
Always disconnect the battery before servicing high current
fuses.
Always replace the cover to the passenger compartment fuse
panel before reconnecting the battery.
If the battery has been disconnected and reconnected, refer to the
Batterysection of theMaintenance and Specificationschapter.
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
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Page 208 of 312
The fuses are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
1 15A* Adjustable pedals
2 10A* Cluster
3 10A* Upfitter #3
4 20A* Power point (Instrument panel)
5 10A* Upfitter #4
6 — Not used
7 30A* High beam headlamps,
Flash-to-pass
8 20A* Back-up lamps
9 — Not used
10 — Not used
11 20A* Radio (Main)
12 20A* Cigar lighter, OBD II
13 5A* Power mirrors
14 — Not used
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
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Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
15 — Not used
16 — Not used
17 15A* Exterior lamps
18 20A* Flasher, Brake On-Off (BOO)
lamps
19 10A* Body Security Module (BSM)
(Security)
20 15A* Trailer tow Electric Brake
Controller (EBC)
21 20A* Heated seats
22 20A* Engine control
23 20A* Engine control (gasoline engine
only)/Climate control (Diesel
engine only)
24 15A* Tow haul, Blower relay, Electronic
Automatic Temperature Control
(EATC)
25 — Not used
26 10A* Airbags
27 15A* Ignition switch RUN feed
28 10A* Trailer tow EBC logic
29 10A* Customer access
30 15A* High beam headlamps
31 15A* Starter relay
32 5A* Radio (start)
33 15A* Cluster, 4x4, Wipers
34 10A* BOO switch (Low current)
35 10A* Instrument cluster
36 — Not used
37 15A* Horn
38 20A* Trailer tow park lamps
39 15A* Heated mirrors
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
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Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
40 20A* Fuel pump
41 10A* Instrument cluster
42 15A* Delayed accessory
43 10A* Fog lamps
44 — Not used
45 10A* Ignition switch RUN/START feed
46 10A* Left-hand low beam headlamp
47 10A* Right-hand low beam headlamp
48 — Not used
101 30A** Trailer tow EBC
102 30A** BSM (Door locks)
103 30A** Ignition switch
104 — Not used
105 — Not used
106 — Not used
107 20A** Trailer tow battery charge
108 30A** Upfitter #1
109 30A** Upfitter #2
110 30A** Ignition switch
111 — Not used
112 30A** Power seat (Driver)
113 30A** Starter
114 30A** Power seat (Passenger)
115 20A** Upfitter control
116 30A** Ignition switch
210 — Not used
211
1 2ISO relay Back-up lamps
212 — Not used
301 Full ISO relay Trailer tow battery charge
302 Full ISO relay Powertrain Control Module (PCM)
303 — Not used
2006 F-250/350/450/550(f23)
Owners Guide (post-2002-fmt)
USA(fus)
Roadside Emergencies
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