
Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
17 20A** Horn feed
18 20A** Transmission control indicator
light, Tow/haul switch
19 — Not used
20 30A** PCM relay coil, PCM relay (PDB
fuses#3,5,7,17)
21 20A** Fuel pump motor, Fuel injectors
22 20A** Diagnostic tool connector, Cigar
lighter feed
23 40A** Blower motor feed
24 50A** IP battery feed (fuses #4, 10, 16,
22)
25 40A** Ignition switch feed (IP fuses #1,
5, 7, 11, 13, 14, 17, 19, 23; PDB
fuses #9, 11)
26 40A** Ignition switch feed (IP fuses #5,
11, 17, 23, 26, 27, 32, 38)
27 30A** Multifunction switch (headlamps)
28 30A** Starter solenoid
29 60A** Power brake assist motor***
Relay 1 — A/C clutch
Relay 2 — Fuel pump relay
Relay 3 — Horn relay
Relay 4 — Starter relay
Relay 5 — Blower motor relay
Relay 6 — PCM relay
Diode 1 — Fuel pump diode
Diode 2 — A/C clutch diode
* Mini Fuses ** Maxi Fuses ***Vehicles with Hydromax brake assist
only
2008 Motorhome(mot)
Supplement
USA(fus)
Roadside Emergencies
68 

IDENTIFYING COMPONENTS IN THE ENGINE COMPARTMENT
6.8L V10 engine
1. Engine coolant reservoir
2. Engine oil filler cap
3. Automatic transmission fluid dipstick
4. Power distribution box
5. Air filter assembly
6. Engine oil dipstick
7. Brake fluid reservoir
8. Power steering fluid reservoir
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Supplement
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Maintenance and Specifications
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•Resting your foot on the brake pedal while driving may reduce fuel
economy.
•Combine errands and minimize stop-and-go driving.
Maintenance
•Keep tires properly inflated and use only recommended size.
•Operating a vehicle with the wheels out of alignment will reduce fuel
economy.
•Use recommended engine oil. Refer toMaintenance product
specifications and capacitiesin this chapter.
•Perform all regularly scheduled maintenance items. Follow the
recommended maintenance schedule and owner maintenance checks
found inscheduled maintenance information.
Conditions
•Heavily loading a vehicle or towing a trailer may reduce fuel economy
at any speed.
•Carrying unnecessary weight may reduce fuel economy (approximately
1 mpg [0.4 km/L] is lost for every 400 lb [180 kg] of weight carried).
•Adding certain accessories to your vehicle (for example bug
deflectors, rollbars/light bars, running boards, ski/luggage racks) may
reduce fuel economy.
•Using fuel blended with alcohol may lower fuel economy.
•Fuel economy may decrease with lower temperatures during the first
8–10 miles (12–16 km) of driving.
•Driving on flat terrain offers improved fuel economy as compared to
driving on hilly terrain.
•Transmissions give their best fuel economy when operated in the top
cruise gear and with steady pressure on the gas pedal.
•Close windows for high speed driving.
EPA fuel economy estimates
Every new vehicle should have a window sticker containing EPA fuel
economy estimates. Contact your authorized dealer if the window sticker
is not supplied with your vehicle. The EPA fuel economy estimates
should be your guide for the fuel economy comparisons with other
vehicles. Your fuel economy may vary depending upon the method of
operation and conditions.
2008 Motorhome(mot)
Supplement
USA(fus)
Maintenance and Specifications
108 

MOTORCRAFT PART NUMBERS
Component 6.8L V10 engine
Air filter element FA-1782
Battery BXT-65-750
Fuel filter FG-872
Oil filter FL-820-S
PCV valve
1
Spark plugs2
Transmission fluid filter FT-175
1The PCV valve is a critical emission component. It is one of the items
listed inscheduled maintenance informationand is essential to the
life and performance of your vehicle and to its emissions system.
For PCV valve replacement, see your authorized dealer. Refer to
scheduled maintenance informationfor the appropriate intervals for
changing the PCV valve.
Replace the PCV valve with one that meets Ford material and
design specifications for your vehicle, such as a Motorcraft or
equivalent replacement part. The customer warranty may be void
for any damage to the emissions system if such a PCV valve is not
used.
2For spark plug replacement, see your authorized dealer. Refer to
scheduled maintenance informationfor the appropriate intervals for
changing the spark plugs.
Replace the spark plugs with ones that meet Ford material and
design specifications for your vehicle, such as Motorcraft or
equivalent replacement parts. The customer warranty may be
void for any damage to the engine if such spark plugs are not
used.
2008 Motorhome(mot)
Supplement
USA(fus)
Maintenance and Specifications
120 

Item Capacity Ford Part NameFord Part Number /
Ford Specification
Engine oil 6.0 quarts (5.7L)Motorcraft SAE 5W-20
Premium Synthetic Blend
Motor Oil (US)
Motorcraft SAE 5W-20
Super Premium Motor
Oil (Canada)XO-5W20-QSP (US)
CXO-5W20-LSP12
(Canada) /
WSS-M2C930-A with
API Certification Mark
Automatic transmission
Torqshift 5-speed17.5 quarts
(16.6L)
3
Motorcraft MERCONLV
AT F
4
XT-10-QLV /
MERCONLV
WSS-M2C938-A
Power steering fluidKeep in FULL
range on dipstick
Motorcraft MERCONV
AT FXT-5-QM /
MERCONV
Parking brake assemblyFill to bottom of
fill plug hole
Rear Axle
Dana 804.0 quarts (3.9L)
5
Motorcraft SAE 75W-90
Synthetic Axle LubricantXY-75W90-QLS /
GL-5
Rear Axle
Dana S1107.0 quarts (6.6L)
6
Motorcraft SAE 75W-140
Synthetic Rear Axle
LubricantXY-75W140-QL /
WSL-M2C192-A and
GL-5
Rear Axle
Dana S1307.0 quarts (6.6L)
5
Motorcraft SAE 75W-140
Synthetic Rear Axle
LubricantXY-75W140-QL /
WSL-M2C192-A and
GL-5
Rear Axle
Dana Spicer 17060S16.0 quarts
(15.1L)Motorcraft SAE 75W-140
Synthetic Rear Axle
LubricantXY-75W140-QL /
WSL-M2C192-A and
GL-5
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Supplement
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Maintenance and Specifications
122 

A
ABS (see Brakes) .......................52
Air cleaner filter ...............118–120
Ambulance packages ....................5
Antifreeze (see Engine
coolant) .......................................95
Anti-lock brake system
(see Brakes) ..........................52–53
Automatic transmission
driving an automatic
overdrive ...................................57
fluid, adding ............................115
fluid, checking ........................115
fluid, refill capacities ..............121
fluid, specification ..................121
Axle
lubricant specifications ..........121
refill capacities ........................121
B
Battery .........................................93
acid, treating emergencies .......93
jumping a disabled battery ......75
maintenance-free ......................93
replacement, specifications ...120
servicing ....................................93
Brakes ..........................................51
anti-lock ...............................52–53
anti-lock brake system (ABS)
warning light .............................53
fluid, checking and adding ...112,
115
fluid, refill capacities ..............121
fluid, specifications .................121
lubricant specifications ..........121
shift interlock ............................55
Bulbs ............................................17
C
Capacities for refilling fluids ....121Cleaning your vehicle
engine compartment ................88
wheels ........................................88
Coolant
checking and adding ................95
refill capacities ..................99, 121
specifications ..........................121
Cruise control
(see Speed control) ....................19
Customer Assistance ..................61
Ford Extended Service Plan ...84
Getting assistance outside the
U.S. and Canada .......................85
Getting roadside assistance .....61
Getting the service you
need ...........................................81
Ordering additional owner’s
literature ...................................86
Utilizing the
Mediation/Arbitration
Program .....................................84
D
Daytime running lamps
(see Lamps) ................................16
Dipstick
automatic transmission
fluid ..........................................115
engine oil ...................................91
Driving under special
conditions ....................................59
through water ...........................60
E
Emergencies, roadside
jump-starting ............................75
Emission control system ..........109
Engine ........................................124
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Supplement
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Index
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cleaning .....................................88
coolant .......................................95
fail-safe cooling .......................100
idle speed control .....................93
lubrication specifications .......121
refill capacities ........................121
service points ............................90
Engine oil ....................................91
checking and adding ................91
dipstick ......................................91
filter, specifications ..........92, 120
recommendations .....................92
refill capacities ........................121
specifications ..........................121
Event data recording ....................5
Exhaust fumes ............................50
F
Fail safe cooling ........................100
Fluid capacities .........................121
Fuel ............................................101
calculating fuel economy .......105
capacity ...................................121
choosing the right fuel ...........104
comparisons with EPA fuel
economy estimates .................108
detergent in fuel .....................105
filling your vehicle with
fuel ...................................101, 106
filter, specifications ........101, 120
improving fuel economy ........105
octane rating ...................104, 124
quality ......................................104
running out of fuel .................105
safety information relating to
automotive fuels .....................101
Fuses ............................................62G
Gas mileage (see Fuel
economy) ...................................105
Gauges .........................................13
transmission fluid
temperature gauge ...................16
H
Hazard flashers ...........................61
Headlamps ...................................16
daytime running lights .............16
flash to pass ..............................17
high beam .................................16
turning on and off ....................16
I
Ignition .................................48, 124
Inspection/maintenance (I/M)
testing ........................................110
Instrument panel
cluster ..........................................8
lighting up panel and
interior .......................................17
J
Jump-starting your vehicle ........75
K
Keys
positions of the ignition ...........48
L
Lamps
daytime running light ...............16
headlamps .................................16
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Supplement
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Index
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headlamps, flash to pass ..........17
instrument panel, dimming .....17
Lights, warning and indicator ......8
anti-lock brakes (ABS) ............53
Load limits ...................................39
Loading instructions ...................43
Lubricant specifications ...........121
Lug nuts ......................................75
M
Message center ...........................11
Motorcraft parts ................101, 120
O
Octane rating ............................104
Oil (see Engine oil) ....................91
Overdrive .....................................19
P
Parking brake ..............................54
Parts (see Motorcraft parts) ....120
Power distribution box
(see Fuses) .................................66
Power steering
fluid, checking and adding ....112
fluid, refill capacity ................121
fluid, specifications .................121
R
Relays ....................................62, 69
Roadside assistance ....................61
S
Safety defects, reporting ......86–87Servicing your vehicle ................89
Spark plugs,
specifications .....................120, 124
Special notice ................................4
Specification chart,
lubricants ...................................121
Speed control ..............................19
Starting your vehicle ............48–50
jump starting ............................75
Steering wheel
tilting .........................................18
T
Tilt steering wheel ......................18
Tires .......................................22–23
alignment ..................................32
care ............................................28
changing ....................................71
checking the pressure ..............27
inflating .....................................24
replacing ..............................30, 73
rotating ......................................32
safety practices .........................31
sidewall information .................33
snow tires and chains ..............38
spare tire ...................................69
terminology ...............................23
tire grades .................................23
treadwear ............................22, 29
Towing .........................................44
trailer towing ............................44
wrecker ......................................80
Transmission ...............................55
automatic operation .................19
brake-shift interlock (BSI) ......55
fluid, checking and adding
(automatic) .............................115
fluid, refill capacities ..............121
2008 Motorhome(mot)
Supplement
USA(fus)
Index
128