Fuse/Relay
locationFuse amp
ratingFuse description
304 — DEF (Urea) line heaters relay (diesel engine
only)
— Powertrain control module power VPWR1
(gasoline engine only)
Individual maxi-fuse holder in engine compartment
Fuse
locationFuse amp
ratingFuse description
9925 30A Hydraulic brakes pump motor 1
Relay center
The relay center is located along the passenger side A-pillar on the right
side of the footwell.
Relay
locationRelay description
R1 Spring applied hydraulic release warning chime module or
PCM power VPWR 2, 3 and 4
R2 A/C compressor clutch
R3 Power windows
R4 Flasher (standard/LED)
R5 Upfitter relay 1
R6 Upfitter relay 2
R7 Headlights
R8 Spare
R1
R9 R10 R11 R12 R13 R14 R15 R16 R17
R18 R19 R20 R21 R22 R23 R24 R25 R26
R2 R3 R4 R5 R6 R7 R8
Roadside Emergencies
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Supplement, 2nd Printing
USA(fus)
Relay
locationRelay description
R9 Upfitter relay 3
R10 Starter
R11 DCU (diesel engine only)
R12 Two–speed axle/Differential lock
R13 Door lock
R14 Air tank moisture valve
R15 DRL #1
R16 Heated mirrors
R17 Spare
R18 Upfitter relay 4
R19 Shift interlock/EPRNDL display
R20 Selective Catalyst Reduction (SCR) system (NOx) (diesel
engine only)
R21 Run
R22 Door unlock
R23 ABS warning indicator
R24 DRL #2
R25 Park lights
R26 Spare
Roadside Emergencies
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Supplement, 2nd Printing
USA(fus)
•The service engine soonindicator may come on. For more
information on the service engine soon
indicator, refer to
Warning lights and chimesin theInstrument Clusterchapter.
Selective Catalytic Reduction (SCR) System - diesel engines
Your vehicle is equipped with a selective catalytic reduction (SCR)
system to help reduce emission levels of oxides of nitrogen from the
exhaust of the diesel engine. The system automatically injects diesel
exhaust fluid (DEF) into the exhaust system to enable proper SCR
function.
Importance of maintaining the DEF level
In order for the SCR system to operate properly, the DEF must be
maintained. Generally, the DEF tank should be filled before the DEF
gauge in the instrument cluster reached the first low level warning (refer
toDEF warning messages and vehicle operations).
The engine control unit monitors the amount of fluid available in the
DEF tank. Failure to maintain an adequate amount of DEF in the system
generates warning messages that appear in the instrument cluster
message center and, unless the DEF tank is refilled, leads to a forced
reduction of engine operations.
DEF warning messages and vehicle operations
Your vehicle is equipped with a DEF gauge located in the instrument
cluster. The low level warning symbols (see chart) are illuminated if the
DEF gauge level drops below 0.5 gallon (1.9L) in the 5 gallon (19.0L)
DEF tank or 1 gallon (3.8L) in the 9 gallon (34.0L) DEF tank.
Upon filling the DEF tank after a low level warning, normal operation
resumes when the vehicle is restarted.
Continued driving without refilling results in the following actions as
required by the U.S. Environmental Protection Agency (EPA):
DEF Low Level Warning and Vehicle Consequence
DEF Tank LevelIndicator
LampsConsequence Remedy
Above initial
warning threshold
(Over 10% full)None None None
Maintenance and Specifications
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ELECTRICAL SYSTEM INSPECTIONS
Periodically inspect electrical connectors on the outside of the cab, and
on the engine and frame for corrosion and tightness. Exposed terminals
such as the fuel sender, cranking motor, alternator and feed-through
studs should be cleaned and re-coated with a lubricant sealing grease
such as MotorcraftSilicone Brake Caliper Grease and Dielectic
Compound XG-3, or equivalent. This should include the ground cable
connector for batteries, engine and cab as well as the jump starting stud.
Accessory feed connections
Vehicle electrical systems are complex and often include powertrain
components such as engine and transmission controls, instrument panels,
ABS, etc. While most systems operate on battery voltage (12 volts),
some systems can be as high as 90 volts or as low as 5 volts. Refer to the
Electrical Circuit Diagram Manuals, available from your vehicle’s
manufacturer, to ensure that any additional body lights and accessories
are connected to circuits that are both appropriate and not overloaded.
No modification should be made to any vehicle control system without
first contacting your dealer.
SUSPENSION INSPECTION
Note:Do not adjust air suspension height to any setting other than the
specified setting. Altering the height setting changes the driveline angle
and may result in unwarrantable component damage, such as
transmission component damage.
Verify drive axle air suspension height and height control valve
performance at engine oil change intervals.
Periodically check:
•
Condition of spring leaves for evidence of fatigue, bending or breakage.
•Condition of suspension mounting brackets and bushings.
•Torque rod mounting fasteners for tightness.
•For proper suspension alignment; this must be maintained at all times.
•U-bolts after the chassis has been operating under load for 1,000 miles
(1,600 km) or six months (whichever comes first), the U-bolt nuts
must be re-torqued. The U-bolt nuts must be re-torqued every
36,000 miles (58,000 km) thereafter. The U-bolt and nut threads and
seats should be cleaned and lubricated to ensure a “like new”
condition when re-torquing.
Note:See theU-bolt nut torquechart later in this section.
Maintenance and Specifications
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USA(fus)
gauge .........................................28
improving fuel economy ........216
octane rating ...........207, 262–263
quality ......................................208
running out of fuel .........107, 209
safety information relating to
automotive fuels .....................204
Fuses ..................................153, 162
G
Gas mileage
(see Fuel economy) .................216
Gauges .........................................28
battery voltage gauge ...............28
engine coolant temperature
gauge .........................................28
engine oil pressure gauge ........28
fuel gauge ..................................28
odometer ...................................28
speedometer .............................28
tachometer ................................28
trip odometer ............................28
H
Hazard flashers .........................153
Headlamps ...................................50
aiming ........................................51
daytime running lights .............50
high beam .................................50
warning chime ..........................20
Heating
heating and air conditioning
system .......................................47
Hood ..........................................189
I
Ignition .......................103, 262–263
chime .........................................20Infant seats (see Safety seats) ..92
Instrument panel
cleaning ...................................178
lighting up panel and
interior .......................................51
J
Jump-starting your vehicle ......162
K
Keys
key in ignition chime ...............20
positions of the ignition .........103
L
Lamps
bulb replacement
specifications chart ..................52
cargo lamps ...............................51
daytime running light ...............50
headlamps .................................50
high beams ................................50
instrument panel, dimming .....51
interior lamps ...........................52
replacing bulbs ...................52–54
Lane change indicator
(see Turn signal) ........................51
Lights, warning and indicator ....20
air suspension ...........................20
anti-lock brakes (ABS) ....20, 127
brake ..........................................20
charging system ........................20
safety belt .................................20
service engine soon ..................20
traction control off ...................20
turn signal indicator .................20
Locks
childproof ..................................68
Index
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USA(fus)
Steering .....................................188
Steering wheel
controls ................................56, 65
tilting .........................................56
Suspension ........................129, 229
SYNC..........................................46
T
Tachometer .................................28
Tires ...........................................238
Towing
wrecker ....................................166
Traction control
off light ......................................20
Transmission .....................132, 138
automatic operation ...............132
brake-shift interlock (BSI) ....131
fluid, checking and adding
(automatic) .............................226
fluid, checking and adding
(manual) .................................227
fluid, refill capacities ..............261
lubricant specifications ..........245
manual operation ....................138
Turn signal ..................................51
U
Upfitter controls .........................65UREA
.........................................210
USB port
......................................45
V
Vehicle loading
..................146–147
Voltmeter
(see Battery voltage gauge)
......28
W
Warning chimes
...........................20
Warning lights (see Lights)
.......20
Washer fluid
..............................191
Water, Driving through
.............108
Wheels
.......................................232
Windows
power
.........................................58
Windshield washer fluid and
wipers
..........................................55
operation
...................................55
replacing wiper blades
...........192
Wrecker towing
.........................166
Index
306
2012 F-650/750(f67)
Supplement, 2nd Printing
USA(fus)