2003 FORD E-450 trailer

GCWR (Gross Combined Weight Rating)/Trailer Weights
EngineRear
axle
ratioMaximum
GCWR - kg
(lbs.)Maximum
Loaded Trailer
Weight - kg
(lbs.)Maximum
frontal area of
trailer - m
2(ft2)
E-350 Cutaway (138”wheelbase, dual rear wheel) (10000 GVWR)
5.4L 4.10 5897 (13000) 3583 (7900) 5.52 (60)
6.8L 4.10 8391 (18500) 4536 (10000) 5.52 (60)
E-350 Chassis Cab (138”wheelbase, dual rear wheel) (10700 GVWR)
5.4L 4.10 5897 (13000) 3583 (7900) 5.52 (60)
6.8L 4.10 8391 (18500) 4536 (10000) 5.52 (60)
E-350 Chassis Cab (158”wheelbase, dual rear wheel) (11500 GVWR)
5.4L 4.10 5897 (13000) 3538 (7800) 5.52 (60)
6.8L 4.10 8391 (18500) 4536 (10000) 5.52 (60)
E-350 Chassis Cab (176”wheelbase, dual rear wheel) (11500 GVWR)
5.4L 4.10/4.56 5897 (13000) 3538 (7800) 5.52 (60)
6.8L 4.10/4.56 8391 (18500) 4536 (10000) 5.52 (60)
E-250 Stripped Chassis (Single rear wheel) (8600 GVWR)
4.2L 4.09 4990 (11000) 3311 (7300) 5.52 (60)
E-350 Stripped Chassis (138”wheelbase) (9600 GVWR)
5.4L 3.55/4.10 5897 (13000) 3992 (8800) 5.52 (60)
6.8L 4.10 8391 (18500) 4536 (10000) 5.52 (60)
E-350 Stripped Chassis (158”wheelbase) (9600 GVWR)
5.4L 3.55/4.10 5897 (13000) 3946 (8700) 5.52 (60)
6.8L 4.10 8391 (18500) 4536 (10000) 5.52 (60)
E-350 Stripped Chassis (138”wheelbase) (10000 GVWR)
5.4L 4.10 5897 (13000) 3856 (8500) 5.52 (60)
6.8L 4.10 8391 (18500) 4536 (10000) 5.52 (60)
E-350 Stripped Chassis (158”wheelbase) (10000 GVWR)
5.4L 4.10 5897 (13000) 3856 (8500) 5.52 (60)
6.8L 4.10 8391 (18500) 4536 (10000) 5.52 (60)
E-350 Chassis Cab (158”wheelbase) (11000 GVWR)
5.4L 4.10 5897 (13000) 3856 (8500) 5.52 (60)
6.8L 4.10 8391 (18500) 4536 (10000) 5.52 (60)
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GCWR (Gross Combined Weight Rating)/Trailer Weights
EngineRear
axle
ratioMaximum
GCWR - kg
(lbs.)Maximum
Loaded Trailer
Weight - kg
(lbs.)Maximum
frontal area of
trailer - m
2(ft2)
E-350 Stripped Chassis (176”wheelbase) (10000 GVWR)
5.4L 4.10 5897 (13000) 3810 (8400) 5.52 (60)
6.8L 4.10 8391 (18500) 4536 (10000) 5.52 (60)
E-450 Cutaway and Chassis Cab (all wheelbases, all GVWRs)
6.8L 4.10/4.56 9072 (20000) 4536 (10000) 5.52 (60)
E-450 Stripped Chassis (all wheelbases, all GVWRs)
5.4L 4.56 5897 (13000) 3719 (8200) 5.52 (60)
6.8L 4.56 8391 (18500) 4536 (10000) 5.52 (60)
E-550 (all wheelbases, all GVWRs)
6.8L 4.88 9072 (20000) 4536 (10000) 5.52 (60)
* Maximum trailer weight for all cutaway (E-350 and E-450) vehicles must
be calculated by subtracting the weight of the vehicle (including
incomplete vehicle weight, and payload which includes second unit body
weight, cargo, and passengers) from the GCW. Otherwise, maximum trailer
weight is 4536 kg (10000 lbs)
For high altitude operation reduce GCWR by 2% per 300 meters (1000 ft)
elevation.
To determine the maximum trailer weight designed for your particular
vehicle as equipped, follow the sectionCalculating the load your vehicle
can tow/carryearlier in this chapter.
Your vehicle’s load capacity is designated by weight, not by volume, so
you cannot necessarily use all available space when loading a vehicle.
Distribute the load so that only 10 to 15% of the total is on the tongue.
Tie down the load so that it does not shift and change the weight on the
hitch.
Towing a trailer places an additional load on your vehicle’s engine,
transmission, axle, brakes, tires and suspension. Inspect these
components carefully after any towing operation.
Note:Do not exceed the GVWR or the GAWR specified on the
certification label.
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Towing trailers beyond the maximum recommended gross trailer
weight exceeds the limit of the vehicle and could result in
engine damage, transmission damage, structural damage, loss of vehicle
control, vehicle rollover and personal injury.
Preparing to tow
Use the proper equipment for towing a trailer and make sure it is
properly attached to your vehicle. See your dealer or a reliable trailer
dealer if you require assistance.
Hitches
Do not use or install hitches that clamp onto the bumper or to the axle.
Underbody hitches are acceptable if installed properly.
Safety chains
Always connect the trailer’s safety chains to the frame or hook retainers
of the vehicle hitch. To connect the trailer’s safety chains, 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 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.
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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.
•Anticipate stops and brake gradually.
When descending long, steep downhill grades, always use a lower gear to
provide engine braking to save wear on brakes. Use Drive (Overdrive
OFF) on moderately steep hills, Second (2) on steep hills, and First (1)
on very steep hills.Do not apply your brakes continuously, as they
may overheat and become less effective.
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.
•If you will be towing a trailer frequently in hot weather, hilly conditions,
at GCW, or any combination of these factors, consider refilling your rear
axle with synthetic gear lube. Refer to theMaintenance and
specificationschapter for the lubricant specification.
•After you have traveled 80 km (50 miles), thoroughly check your
hitch, electrical connections and trailer wheel lug nuts.
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•When stopped in traffic for long periods of time in hot weather, place
the gearshift in P (Park) and increase idle speed. This aids engine
cooling and air conditioner efficiency.
•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 on a trip
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.
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.
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.
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Fuse/Relay
LocationFuse Amp
RatingPassenger Compartment Fuse
Panel Description
6 10A Brake shift interlock, Speed control,
DRL module
7 10A Multi-function switch, Turn signals
8 30A Radio capacitor(s), Ignition coil, PCM
diode, PCM power relay, Fuel heater
(Diesel only), Glow plug relay (Diesel
only)
9 30A Wiper control module, Windshield
wiper motor
10 20A Main light switch, Park lamps, License
lamp (external lamps), Multi-function
switch (flash-to-pass)
11 15A Brake pressure switch, Multi-function
switch (hazards), Brake lamp switch,
Brake lamps
12 15A Transmission Range (TR) sensor,
Backup lamps, Auxiliary battery relay
13 15A Blend door actuator, A/C heater,
Function selector switch
14 5A Instrument cluster (air bag and charge
indicator)
15 5A Trailer battery charge relay
16 30A Power seats
17—Not used
18—Not used
19 10A Air bag diagnostic monitor
20 5A Overdrive cancel switch
21 30A Power windows*
22 15A Memory power radio, Rear seat
control unit, Video screen
23 20A Cigar lighter, Data Link Connector
(DLC)
24—Not used
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If the battery has been disconnected and reconnected, refer to the
Batterysection of theMaintenance and specificationschapter.
The high-current fuses are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
1—Not used
2—Not used
3—Not used
4 10A* Powertrain Control Module (PCM) Keep
Alive Memory, Instrument cluster, Voltmeter
5 10A* Right trailer turn signal
6 10A* Left trailer turn signal
7 20A* Clearance lamps
8 60A**
I/P fuses 4, 5, 10, 11, 16, 22, 23, 28, 32, 38
9 30A**PCM power relay, Engine compartment fuse 4
10 60A** Auxiliary battery relay, Engine compartment
fuses 14, 22
11 30A** IDM relay (Diesel only)
12 60A** Engine compartment fuses 25, 27
13 50A** Blower motor relay (blower motor)
AB3
2
146 5715 14 13 12 11 10 9 823 22 21 20 19 18 17 1624 26 25 27
29
CDG F EK J H
28
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Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box Description
14 30A** Trailer running lamps relay, Trailer backup
lamps relay
15 40A** Main light switch, Daytime Running Lights
(DRL)
16 50A** Auxiliary blower motor relay
17 30A** Fuel pump relay
18 60A** I/P fuses 33, 37, 39, 40, 41
19 60A** 4WABS module
20 20A** Electric brake controller
21 50A** Modified vehicle power
22 40A**
Trailer battery charge relay, Modified vehicles
23 60A** Ignition switch, Fuse panel
24 20A* Natural gas tank valves (NGV only)
25 20A* NGV module (NGV only)
26 10A* A/C clutch (4.2L only)
27 15A* DRL module, Horn relay
28—PCM diode
29—Not used
A—Marker lamps relay
B—Stop lamp relay
C—Trailer backup lamps relay
D—Trailer running lamps relay
E—Trailer battery charge relay
F—IDM relay (Diesel only), A/C clutch relay
(4.2L only)
G—PCM relay
H—Blower motor relay
J—Horn relay
K—Fuel pump relay
* Mini fuses ** Maxi fuses
Relays
Relays are located in the power distribution box and should be replaced
by qualified technicians.
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