2003 FORD SUPER DUTY brake

Special loading instructions for owners of pickup trucks and
utility-type vehicles
For important information regarding safe operation of this type
of vehicle, see thePreparing to drive your vehiclesection in
this chapter.
Loaded vehicles mayhandle differentlythan unloaded vehicles.
Extra precautions, such as slower speeds and increased stopping
distance, should be taken when driving a heavilyloaded vehicle.
Your vehicle can haul more cargo and people than most passenger cars.
Depending upon the type and placement of the load, hauling cargo and
people mayraise the center of gravityof the vehicle.
Calculating the load your vehicle can carry/tow
1. Use the appropriate maximum GCWR chart (in theTrailer Towing
section in this chapter) for your type of engine and rear axle ratio.
2. Weigh your vehicle without cargo. To obtain correct weights, take your
vehicle to a shipping companyor an inspection station for trucks.
3. Subtract your loaded weight from the maximum GCWR in the chart.
This is the maximum trailer weight your vehicle can tow. It must be
below the maximum trailer weight shown in the chart.
TRAILER TOWING
Your vehicle maytow a Conventional/Class IV trailer or fifth wheel trailer
provided the maximum trailer weight is less than or equal to the
maximum trailer weight listed for your engine and rear axle ratio on the
following charts.
2nd unit bodies are not included in maximum trailer weight ratings. The
weight of the additional “body” must be subtracted from the maximum
trailer weight.
Your vehicle’s load capacityis designated byweight, not byvolume, so
you cannot necessarily use all available space when loading a vehicle.
Towing a trailer places an additional load on your vehicle’s engine,
transmission, axle, brakes, tires and suspension. Inspect these
components carefullyprior to and after anytowing operation. The
following trailer towing charts applyto vehicles equipped with gasoline
engines; for Diesel engines, refer to the7.3 Liter Power Stroke Direct
Injection Turbo Diesel Supplement.
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2. Measure the height of a reference point on the front and rear bumpers
at the center of the vehicle.
3. Attach the trailer to the vehicle and adjust the hitch equalizers so that
the front bumper height is within 0–13 mm (0.5 in) of the reference
point. After proper adjustment, the rear bumper should be no higher
than in Step 2.
Note:Adjusting an equalizing hitch so the rear bumper of the vehicle is
higher than it was unloaded will defeat the function of the load
equalizing hitch and maycause unpredictable handling.
Safety chains
Always connect the trailer’s safety chains to the frame or hook retainers
of the vehicle hitch. To connect the trailer’s safetychains, cross the
chains under the trailer tongue and allow slack for turning corners.
If you use a rental trailer, follow the instructions that the rental agency
gives to you.
Do not attach safety chains to the bumper.
Trailer brakes
Electric brakes and manual, automatic or surge-type trailer brakes are safe
if installed properlyand adjusted to the manufacturer’s specifications. The
trailer brakes must meet local and Federal regulations.
Do not connect a trailer’s hydraulic brake system directly to your
vehicle’s brake system. Your vehicle may not have enough
braking power and your chances of having a collision greatly increase.
The braking system of the tow vehicle is rated for operation at the
GVWR not GCWR.
Trailer lamps
Trailer lamps are required on most towed vehicles. Make sure your
trailer lamps conform to local and Federal regulations. See your dealer or
trailer rental agencyfor proper instructions and equipment for hooking
up trailer lamps.
Using a step bumper (if equipped)
The rear bumper is equipped with an integral hitch and onlyrequires a
ball with a 25.4 mm (one inch) shank diameter. The bumper has a 2,270
kg (5,000 lb.) trailer weight and 227 kg (500 lb.) tongue weight capacity.
If it is necessaryto relocate the trailer hitch ball position, a
frame-mounted trailer hitch must be installed.
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146

Driving while you tow
When towing a trailer:
•Turn off the speed control. The speed control mayshut off
automaticallywhen you are towing on long, steep grades.
•Consult your local motor vehicle speed regulations for towing a trailer.
•To eliminate excessive shifting, use a lower gear. This will also assist
in transmission cooling. (For additional information, refer to the
Understanding the positions of the 4–speed automatic
transmissionsection in this chapter.
•Anticipate stops and brake gradually.
•Do not exceed the GCWR rating or transmission damage mayoccur.
Servicing after towing
If you tow a trailer for long distances, your vehicle will require more
frequent service intervals. Refer to your scheduled maintenance guide for
more information.
Trailer towing tips
•Practice turning, stopping and backing up before starting on a trip to
get the feel of the vehicle trailer combination. When turning, make
wider turns so the trailer wheels will clear curbs and other obstacles.
•Allow more distance for stopping with a trailer attached.
•The trailer tongue weight should be 10–15% of the loaded trailer
weight.
•After you have traveled 80 km (50 miles), thoroughly check your
hitch, electrical connections and trailer wheel lug nuts.
•To aid in engine/transmission cooling and A/C efficiencyduring hot
weather while stopped in traffic, place the gearshift lever in P (Park)
(automatic transmission) or N (Neutral) (manual transmissions).
•Vehicles with trailers should not be parked on a grade. If you must
park on a grade, place wheel chocks under the trailer’s wheels.
Launching or retrieving a boat
When backing down a ramp during boat launching or retrieval,
•Do not allow the static water level to rise above the bottom edge of
the rear bumper.
•Do not allow waves to break higher than 15 cm (6 inches) above the
bottom edge of the rear bumper.
•Disconnect the trailer tow electrical connector to prevent blown fuses
caused bywater entering into your trailer’s electrical wiring.
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Standard fuse amperage rating and color
COLOR
Fuse
ratingMini
fusesStandard
fusesMaxi
fusesCartridge
maxi
fusesFuse link
cartridge
2A GreyGrey — — —
3A Violet Violet — — —
4A Pink Pink — — —
5A Tan Tan — — —
7.5A Brown Brown — — —
10A Red Red — — —
15A Blue Blue — — —
20A Yellow Yellow Yellow Blue Blue
25A Natural Natural — — —
30A Green Green Green Pink Pink
40A — — Orange Green Green
50A — — Red Red Red
60A — — Blue — Yellow
70A — — Tan — Brown
80A — — Natural — Black
Passenger compartment fuse panel / power distribution box
The fuse panel is located below and to the left of the steering wheel by
the brake pedal. Remove the panel cover to access the fuses.
To remove the fuse panel cover,
turn the panel fasteners
counterclockwise.
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Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse Panel
Description
12 20A* Cigar lighter/OBD II
13 5A* Power mirrors/switches
14 15A* Daytime running lamps (DRL)
15 10A* Not used
16 15A* Not used
17 15A* Exterior lamps
18 20A* Turn lamps/Brake on-off switch (high)
19 10A* Bodysecuritymodule/4x4 module
20 — Not used
21 25A* Not used
22 20A* Engine control
23 20A* Engine control (gasoline engine only)
24 15A* Not used
25 10A* 4-Wheel Anti-lock Brake System (4WABS)
module
26 10A* Air bags
27 15A* Ignition switch Run feed
28 10A* EATC module/Front blower relaycoil
29 10A* Customer access
30 15A* Highbeam headlamps
31 15A* Clutch interlock switch (manual transmissions
only), Transmission range sensor (automatic
transmissions only) then to starter relay coil
(all transmissions)
32 5A* Radio (start)
33 15A* Front wiper
34 10A* Brake on-off switch
35 10A* Instrument cluster
36 10A* PCM Keep-Alive
37 15A* Horn
38 20A* Trailer tow park lamps and backup lamps
39 — Not used
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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 10A* Not used
45 10A* Ignition switch Run/Start feed
46 10A* Left-hand lowbeam
47 10A* Right-hand lowbeam
48 10A* Not used
101 30A** Trailer tow electric brake
102 30A** Door locks/Bodysecuritymodule
103 50A** Ignition switch
104 40A** Not used
105 30A** Injector driver module (Diesel engine only)
106 30A** Front wiper main
107 40A** Front blower motor
108 40A** Not used
109 30A** Heated seats
110 50A** Ignition switch
111 30A** 4WD/Shift on the fly
112 30A** Left-hand power seats
113 30A** Starter motor
114 30A** Right-hand power seats
115 20A** Trailer tow batterycharge
116 30A** Ignition switch
601 30A CB*** Door window motors
602 60A** 4WABS module
210 — Not used
211 — Not used
212 — Not used
301 — Front blower motor relay
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Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse Panel
Description
302 — Powertrain (EEC) relay
303 — Injector driver module relay(Diesel engine
only)
304 — Not used
305 — Trailer tow batterycharge relay
306 — Delayed accessory relay
307 — Starter relay
* Mini Fuses ** Maxi Fuses ***Circuit Breaker
CHANGING A FLAT TIRE
If you get a flat tire while driving:
•do not brake heavily.
•graduallydecrease the vehicle’s speed.
•hold the steering wheel firmly.
•slowlymove to a safe place on the side of the road.
The use of tire sealants is not recommended and may
compromise the integrityof your tires. The use of tire sealants
may also affect your tire pressure monitoring system (if equipped).
Spare tire information
Your vehicle maybe equipped with a spare tire that can be used as
either a spare or a regular tire. The spare tire is not equipped with wheel
trim. The wheel trim from the original wheel/tire maybe used on the
spare.
If your vehicle is equipped with 4WD, a spare tire of a different
size than the road tires should not be used. Use of such a tire
could result in damage to driveline components and an increased risk
of loss of vehicle control, vehicle rollover, personal injuryor death.
If your vehicle is equipped with a tire pressure monitoring
system, refer to Tire Pressure Monitoring System (if equipped)
in the Maintenance and specifications section for important information
before changing your tires. If the tire pressure monitoring system
becomes damaged, it will no longer function.
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3. Fullyinsert the jack handle
through the bumper hole and into
the guide tube. The keyand lock
will engage with a slight push and
counterclockwise turn. Some
resistance will be felt when turning
the jack handle assembly.
4. Turn the handle counterclockwise
and lower the spare tire until you
can slide the tire rearward and the
cable is slack.
5. Remove the retainer through the center of the wheel.
Tire change procedure
1. Park on a level surface, activate
hazard flashers and set the parking
brake.
•Automatic transmission: Place
gearshift lever in P (Park).
•Manual transmission: Place
gearshift lever in R (Reverse).
•Electronic Shift On the Fly4WD:
Place transfer case in any
position.
•Manual shift transfer case 4WD:
Place transfer case in 2H, 4H or
4L.
To prevent the vehicle from
moving when you change a
tire, be sure the parking brake is
set, then block (in both
directions) the wheel that is
diagonallyopposite (other side
and end of the vehicle) to the tire
being changed.
2. Turn engine off and block the diagonallyopposite wheel (block not
provided).
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161