
Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
301—Fuel heater relay (CAT and
Cummins only)/7.3L Power Stroke
PCM relay)
302—Park lamps relay
303—Blower motor relay
304—Air ABS relay
401—Not used
501—Not used
502—Not used
503 Diode 7.3L Power Stroke PCM diode
* Mini Fuses ** Maxi Fuses
Relays
The relay box is located on the rear crossmember.
Air Brake Trailer Tow Relays (if equipped)
Roadside Emergencies
159

excessive or prolonged breathing of fuel vapor can cause serious
illness and permanent injury.
•Avoid getting fuel liquid in your eyes. If fuel is splashed in the eyes,
remove contact lenses (if worn), flush with water for 15 minutes and
seek medical attention. Failure to seek proper medical attention could
lead to permanent injury.
•Fuels can also be harmful if absorbed through the skin. If fuel is
splashed on the skin and/or clothing, promptly remove contaminated
clothing and wash skin thoroughly with soap and water. Repeated or
prolonged skin contact with fuel liquid or vapor causes skin irritation.
If you must replace the fuel filler cap, replace it with a genuine
Ford or Motorcraft part. The customer warranty may be void for
any damage to the fuel tank or fuel system if a genuine Ford or
Motorcraft fuel filler cap is not used.
If you do not use the proper fuel filler cap, excessive pressure or
vacuum in the fuel tank may damage the fuel system or cause
the fuel system to work improperly in a collision, which may result in
possible personal injury.
Choosing the right fuel
At operating temperatures below 0°C (32°F), use a blend of No. 1D and
No. 2D Diesel fuels, also known as winterized No. 2D.
Do not use diesel fuel blended with waste oil in engines equipped with a
catalytic converter-muffler. Blending waste oil in with the fuel will plug
the catalytic converter-muffler, resulting in a significant loss of engine
power. Your emissions warranty will be voided if blending waste oil with
diesel fuel is practiced.
Use low sulfur (less than 0.05% by weight) fuel as required by the EPA
for emission compliance.
Do not mix diesel fuel with gasoline, gasohol or alcohol. This
could cause an explosion resulting in personal injury.
Do not use starting fluid such as ether or gasoline. Such fluids
can cause immediate explosive damage to the engine and
possible personal injury.
Maintenance and Specifications
193

Fuel filter replacement—7.3L Power Stroke engine
The fuel filter/water separator is
located on the right side of the
engine. Replace the fuel filter/water
separator as recommended in the
general maintenance information
section, or sooner if it becomes
plugged. Vehicles operated on fuel
with more than average impurities
may require replacement of the fuel
filter more frequently. The filter has
a water drain valve built into the
bottom of the filter housing.
Removal
1. Remove the fuel filter cap by
turning counterclockwise. The fuel
filter element will come out with the
cap.
2. Remove and discard the bevel gasket. Carefully clean the mating
surfaces.
3. Press in on the fuel filter element locking tabs to separate the element
from the cap.
Installation
Note:The engine will not run properly if the fuel filter is not installed in
housing.
Maintenance and Specifications
197

Emissions control system(s) laws
Federal law prohibits vehicle manufacturers, dealers and other persons
engaged in the business of repairing, servicing, selling, leasing or trading
motor vehicles, as well as fleet operators from knowingly removing or
rendering an emissions control device or system inoperative. Further,
modifications of the emissions control system(s) could create liability on
the part of individual owners under the laws of some states. In Canada,
modification of the emissions control system could create liability under
applicable Federal or Provincial laws.
NOISE EMISSIONS WARRANTY, PROHIBITED TAMPERING ACTS
AND MAINTENANCE
On January 1, 1978, Federal regulations became effective governing the
noise emissions on trucks over 4 535 kgs. (10 000 lbs.) GVWR. The
following statements concerning prohibited tampering acts and
maintenance and the noise warranty are found in the Warranty Guide,
and are applicable to completed trucks.
Tampering with noise control system prohibited
Federal law prohibits the following acts or the causing thereof: (1) The
removal or rendering inoperative, by any person other than for purposes
of maintenance, repair or replacement, of any device or element of
design incorporated into any new vehicle for the purpose of noise control
prior to its sale or delivery to the ultimate purchaser or while it is in use,
or (2) the use of the vehicle after such device or element of design has
been removed or rendered inoperative by any person.
Among those acts presumed to constitute tampering are the following
acts listed:
Vehicle System Acts
Acoustical Shielding Removal of noise shields, hood
blanket, tunnel liner or acoustical
absorptive material.
Engine Removal or rendering inoperative
the engine speed governor so as to
allow engine speed to exceed
manufacturer specifications.
Removal of engine mounted noise
shield or oil pan enclosure.
General Maintenance Information
227

Maintenance Operation Frequency - Observation
Inspect the automatic slack
adjuster functionInsufficient power shown in loaded
practice stop
Check the operation of the
brakes, the clutch, and the
steering (*b,a)Vehicle handling qualities not up to
par
Inspect the vehicle for missing,
damaged, or mislocated noise
shieldsExcessive noise emanates from under
the cab or engine compartment
Check the engine performance
and the engine governorExcessive engine noise
Inspect the fan, the fan shroud,
and the fan clutchEngine overheats, fans runs at high
speed constantly, excessive fan noise,
or fan wobble due to worn bearings
Check for operation of ABS
warning lampAt each engine start up
Inspect the entire exhaust
system (including inlet pipe,
muffler, outlet pipe and all
exhaust clamps and fasteners)
for holes, leakage, breakage,
looseness and corrosive
damageExcessive noise or the smell of fumes
is experienced
Inspect the engine air
induction system (including the
air ducts, the air cleaner, and
the air cleaner element) for
loose fitting, damaged or
missing componentsExcessive noise emanates from the
engine compartment
Inspect the tires and check the
air pressure (*c)Poor steering, wandering or excessive
tire wear
Balance the wheels and the
tiresVibration or abnormal tire wear
indicates imbalance
Check the front end alignment
(*c)Poor steering, wandering or excessive
tire wear
General Maintenance Information
237

A
Air cleaner filter .......................206
Air conditioning
manual heating and air
conditioning system .................57
Audio system
(see Radio) ................20, 25, 32, 40
Automatic transmission ............132
Auxiliary power point .................73
B
Battery .......................................184
jumping a disabled battery ....165
voltage gauge ............................17
BeltMinder ...................................96
Brakes ................................113, 119
anti-lock ...................114–115, 121
anti-lock brake system
(ABS) warning light ...11–12, 115
brake warning light ............11–12
fluid, checking and adding ....203
parking ....................116, 118, 122
pedals (see Power
adjustable foot pedals) ............73
trailer .......................................124
C
CD-6 disc .....................................40
CD-single premium .....................32
Child safety restraints ..............101
child safety belts ....................101
Child safety seats ......................104
attaching with tether straps ..108
in front seat ............................106
in rear seat ..............................106
tether anchorage hardware ...108Cleaning your vehicle
engine compartment ..............175
exterior ....................................177
instrument panel ....................176
interior .....................................176
plastic parts ............................176
washing ....................................174
waxing .....................................174
wheels ......................................175
woodtone trim ........................176
Climate control (see Air
conditioning or Heating) ......56–57
Clock ..........................23, 29, 36, 44
Clutch ........................................202
fluid ..........................................202
Compass, electronic ....................70
calibration .................................72
set zone adjustment .................71
Console
overhead ....................................70
Controls
power seat .................................89
Coolant ......................................186
refill capacities ........................190
Cruise control
(see Speed control) ....................76
Customer Assistance ................150
Getting assistance outside
the U.S. and Canada ..............171
Getting roadside assistance ...150
Getting the service
you need .................................166
Ordering additional
owner’s literature ...................172
The Dispute Settlement
Board .......................................168
Index
243

Instrument panel
cleaning ...................................176
lighting up panel
and interior ...............................62
J
Jump-starting your vehicle ......165
K
Keys
key in ignition chime ...............15
removing from the ignition ....145
L
Lamps ..........................................72
bulb replacement
specifications chart ..................64
cargo lamps ...............................62
daytime running light ...............61
fog lamps ...................................62
headlamps .................................61
headlamps, flash to pass ..........61
instrument panel, dimming .....62
interior lamps ...........................63
replacing bulbs ...................63–67
Lane change indicator
(see Turn signal) ........................63
Lights, warning and
indicator ..................................9, 14
anti-lock brakes
(ABS) ..........................11–12, 115
brake ....................................11–12
charging system ........................13
check coolant ......................12–13
high beam .................................14
safety belt .................................12
service engine soon ....................9
turn signal indicator .................14
Lubricant specifications ...........218M
Maintenance and Care ..............229
Manual transmission .................141
Mirrors .........................................75
heated ........................................73
side view mirrors (power) .......75
O
Odometer .....................................18
P
Panic alarm feature,
remote entry system ..................83
Parking brake ............116, 118, 122
Power distribution box
(see Fuses) ...............................155
Power door locks ........................82
Power mirrors .............................75
Power point .................................73
Power steering ..................130–131
fluid, checking and adding ....201
Power Windows ...........................74
R
Radio ..........................20, 25, 32, 40
Radio reception .....................54–55
Refill capacities for fluids ........215
Relays ................................151, 159
Remote entry system ...........82–83
illuminated entry ......................85
locking/unlocking doors .....82–83
panic alarm ...............................83
replacement/additional
transmitters ...............................84
Index
245