2003 FORD F150 transmission

Trailer brakes
Electric brakes and manual, automatic or surge-type trailer brakes are
safe if installed properly and 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 agency for 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 only requires 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 necessary to relocate the trailer hitch ball position, a
frame-mounted trailer hitch must be installed.
Driving while you tow
When towing a trailer:
•Turn off the speed control. The speed control may shut off
automatically when 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 may occur.
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.
Driving
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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 efficiency during 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
Disconnect the wiring to the trailer before backing the trailer
into the water. Reconnect the wiring to the trailer after the
trailer is removed from the water.
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.
Exceeding these limits may allow water to enter vehicle components:
•causing internal damage to the components.
•affecting driveability, emissions and reliability.
Replace the rear axle lubricant any time the axle has been submerged in
water. Rear axle lubricant quantities are not to be checked or changed
unless a leak is suspected or repair required.
RECREATIONAL TOWING (ALL WHEELS ON THE GROUND)
An example of recreational towing would be towing your vehicle behind
a motorhome. Follow these guidelines if you have the need for
recreational towing your vehicle with all four wheels on the ground.
These guidelines are designed to ensure that your transmission is not
damaged.
Driving
169

2WD vehicles (with automatic transmissions):
•Place the transmission in N (Neutral)
•Maximum speed is 56 km (35 mph)
•Maximum distance is 80 km (50 miles)
If a distance of 80 km (50 miles) or a speed of 56 km (35 mph) must be
exceeded, the drive shaft will have to be removed before the vehicle is
towed.
Ford recommends the driveshaft be removed/installed only by a qualified
technician. See your local dealer for driveshaft removal/installation.
Improper removal/installation of the driveshaft can cause
transmission fluid loss, damage to the driveshaft and internal
transmission components.
4WD vehicles electronic shift transfer case (with automatic
transmissions):
4x4 vehicles with electronic shift on the fly cannot be towed with any
wheels on the ground.
SNOWPLOWING
Ford recommends the following specifications for low speed, personal
use snow removal:
•F-150 4x4 (except F-150 Supercrew, Lightning and Harley-Davidson
models)
•5.4L engine
•Heavy-duty service package
•Super engine cooling
•Heavy-duty front suspension package
•Automatic transmission with auxiliary automatic transmission fluid
cooling
•All-terrain tires
•Limited slip and optional axle ratio.
Do not install a snowplow and plow with your vehicle until it has been
driven at least 800 km (500 miles).
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170

Transmission operation while plowing
•Shift transfer case to 4L (4WD Low) when plowing in small areas at
speeds below 8 km/h (5 mph).
•Shift transfer case to 4H (4WD High) when plowing larger areas or
light snow at higher speeds. Do not exceed 24 km/h (15 mph).
•Do not shift the transmission from a forward gear to R (Reverse) until
the engine is at idle and the wheels are stopped.
•If the vehicle is stuck, shift the transmission in a steady motion
between forward and reverse gears. Do not rock the vehicle for more
than a few minutes. The transmission and tires may be damaged or
the engine can overheat.
Do not rock the vehicle if the engine is not at operating
temperature. Do not rock the vehicle for more than a minute. The
transmission and tires may be damaged or the engine may
overheat.
Do not spin the wheels at over 35 mph (55 km/h). The tires may
fail and injure a passenger or bystander.
Driving
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The fuses are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
1 15A Audio
2 5A Powertrain Control Module
(PCM), Cluster
3 20A Cigar lighter, Data link connector
4 5A Power mirror switch, Mirror turn
signal relays
5 15A Speed control module, Reverse
lamp, Climate mode switch,
Daytime Running Lamps (DRL)
relay, Digital Transmission Range
(DTR) sensor
6 5A Cluster, Brake shift interlock
solenoid, GEM
FUSE1 12 22
21323
617 27
718 28
819 29
930
20
31 21 11 10
RELAY
5 RELAY
4 RELAY
3 RELAY
2 RELAY
1
31424
41525
51626
Roadside Emergencies
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Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
7—Not used
8 5A Radio, Remote entry module,
GEM, In-vehicle entertainment
system (SuperCrew only)
9—Not used
10—Not used
11 30A Front washer pump relay, Wiper
run/park relay, Wiper HI/LO relay,
Windshield wiper motor
12—Not used
13 20A Stop lamp switch (Lamps),
Turn/Hazard flasher
14 15A Battery saver relay, Interior lamp
relay
15 5A Stop lamp switch (speed control,
brake shift interlock), GEM, Rear
Anti-lock Brake System (RABS)
module
16 20A Headlamps (hi beams), Cluster
(hi beam indicator)
17—Not used
18 5A Instrument illumination (dimmer
switch power)
19—Not used
20 5A Audio, GEM, PCM, Transmission
range sensor
21 15A DTR sensor, Clutch switch,
Starter relay, I/P fuse 20
22 10A Air bag module, Passenger air bag
deactivation module
Roadside Emergencies
179

Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
23 10A Trailer tow battery Charge relay,
Turn/Hazard flasher, 4x4
solenoids, 4x4 relays, Overhead
console, 4–Wheel Anti-lock Brake
System (4WABS) module, EC
mirror, Heated seats
24 10A Function selector switch assembly
25 10A Heated mirrors
26 10A Right-hand low beam headlamp
27 5A Foglamp relay and foglamp
indicator, Main light switch
(upstream)
28 10A Left-hand low beam headlamp
29 5A Autolamp module, Transmission
overdrive control switch, Central
security module, Beltminder
30 30A Passive Anti-theft transceiver,
Cluster, Ignition coils, PCM relay,
Coil on plugs, Radio noise
capacitor, ECC diode
31—Not used
Relay 1—Interior lamp relay
Relay 2—Battery saver relay
Relay 3—Not used
Relay 4—One-touch down window relay
Relay 5—Accessory delay relay
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.
Always disconnect the battery before servicing high current
fuses.
Roadside Emergencies
180

Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
8 15A* Power door locks, Central
Security Module (CSM), Lock
relays (not used on SuperCrew)
9 15A* Daytime Running Lamps (DRL),
Fog lamps
10 20A* Fuel pump
11 20A* Alternator field
12 20A* Rear auxiliary power point
(SuperCrew only)
13 15A* A/C clutch
14—Not used
15 10A* Running board lamps
16 15A* Bi-fuel injector module, fuel
selector switch and alternative
fuel injectors (Bi-fuel vehicles
only)
17—Not used
18 15A* PCM, Fuel injectors, Fuel pump
relay, Mass air flow sensor
19 10A* Trailer/Camper adapter (right
stop/turn lamp)
20 10A* Trailer/Camper adapter (left
stop/turn lamp)
21—Not used
22—Not used
23 15A* HEGO sensor, Automatic
transmission
24—Not used
101 30A** Trailer tow battery charge
Roadside Emergencies
182