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3. Move the 4WD control to the desired position.
The message center will display4X4 SHIFT IN PROGRESSduring the
shift. The message center will then display the system mode selected.
If any of the above shift conditions are not met, the shift will not occur
and the message center will display information guiding the driver
through the proper shifting procedures.
If 4X4 SHIFT IN PROGRESS is displayed for more than five
seconds, transfer case gear tooth blockage is present. To alleviate
this condition, move the vehicle forward approximately five feet
(2 meters). If a blocked shift remains present, reset the 4X4
mode select switch to the desired mode. The system will
reattempt a shift.
Note:Some noise may be heard as the system shifts or engages; this is
normal.
Electronic locking differential (ELD) (if equipped)
The electronic locking differential (ELD) is a device housed in the rear
axle which allows both rear wheels to turn at the same speed. The ELD
can provide additional traction should the vehicle become stuck. The
ELD is electronically activated by the driver and can be shifted on the
fly. It is intended for use in mud, rocks, sand, or any off-road condition
where maximum traction is needed. It is not intended for use on dry
pavement.
The ELD is affected by the following conditions:
•The 4WD control must be in either 4H or 4L mode.
•The ELD will not engage if the vehicle speed is above 20 mph
(30 km/h) in 4X4 High or 56 mph (90 km/h) in 4X4 Low.
•In 4X4 High, the ELD will disengage at speeds above 25 mph
(40 km/h) and will automatically reengage at speeds below 20 mph
(30 km/h).
•In 4X4 Low, the ELD will disengage at speeds above 62 mph
(100 km/h) and will automatically reengage at speeds below 56 mph
(90 km/h).
•The ELD will not engage if one wheel is spinning 9 mph (15 km/h)
faster than the other.
The ELD is designed for off-road use only.
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Owners Guide, 1st Printing
USA(fus)
Driving
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Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
11 10A Not used (spare)
12 7.5A Power mirror switch, Memory seat
module microprocessor power,
Steering column switch
13 5A SYNC
14 10A Not used (spare)
15 10A Climate control
16 15A Ignition switch feed
17 20A All lock motor feeds
18 20A Driver memory seat switch
19 25A Not used (spare)
20 15A Adjustable pedals, Datalink
21 15A Fog lamps, Fog lamp indicator
22 15A Park lamps, Side marker lamps
23 15A High beam headlamps
24 20A Horn
25 10A Interior demand lamps, Mid box
power feed
26 10A Instrument panel cluster, Key out
inhibit solenoid, Radio info display
(CID), Radio buttons, Key-in
chime
27 20A Not used
28 5A Radio muting
29 5A Instrument panel cluster
30 5A Passenger airbag disable indicator
31 10A Restraints control module
32 10A Non-integrated compass module,
Heated-only seat module
33 10A Trailer brake controller
34 5A Electronic locking differential
indicator
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Owners Guide, 1st Printing
USA(fus)
Roadside Emergencies
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Fuse/Relay
LocationFuse Amp
RatingProtected Circuits
35 10A Rear park assist
36 5A PATS transceiver
37 10A Not used (spare)
38 20A Subwoofer
39 20A Radio, Navigation display
40 20A Not used (spare)
41 15A EC mirror, Door lock switch
illumination, Radio accessory
delay
42 10A Not used (spare)
43 10A Heated mirror/backlight relay,
Rain sensor, Reverse camera
44 10A Not used (spare)
45 5A Front wiper logic, Blower motor
relay
46 7.5A Occupant classification sensor
(OCS)
47 30A Circuit
BreakerPower windows, Moon roof,
Power sliding backlight
48 — Delayed accessory relay (Feeds
fuse 41 and circuit breaker 47)
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.
WARNING:Always disconnect the battery before servicing high
current fuses.
WARNING:To reduce risk of electrical shock, always replace
the cover to the Power Distribution Box before reconnecting the
battery or refilling fluid reservoirs.
If the battery has been disconnected and reconnected, refer to the
Batterysection of theMaintenance and Specificationschapter.
2009 F-150(f12)
Owners Guide, 1st Printing
USA(fus)
Roadside Emergencies
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