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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
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
11 30A** IDM relay (Diesel only)
12 60A** Engine compartment fuses 25, 27
13 50A** Blower motor relay (blower motor)
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 30A* 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
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Fuse/Relay
LocationFuse Amp
RatingPower Distribution Box
Description
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.
CHANGING A FLAT TIRE
If you get a flat tire while driving:
•do not brake heavily.
•gradually decrease the vehicle’s speed.
•hold the steering wheel firmly.
•slowly move to a safe place on the side of the road.
The use of tire sealants is not recommended and may
compromise the integrity of your tires. The use of tire sealants
may also affect your tire pressure monitoring system (if equipped).
Spare tire information
The spare tire for your vehicle is stowed under the rear of your vehicle
(except cutaway and stripped chassis models).
To remove the spare tire:
1. Open the rear doors and remove
the thumb screw and anti-theft
bracket. If finger pressure will not
remove the thumb screw, use the
lug wrench to loosen the screw.
2. Remove the access cover from
the rubber strip behind the left
door.
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3. Remove the jack handle from the
right side compartment and insert
the tip of the jack handle through
the access hole and into the tube.
4. Turn the jack handle
counterclockwise until the cable is
slack and the tire can be slid from
under the vehicle.
5. Remove the retainer from the
spare tire.
To stow the cable retainer with the spare removed, turn the jack handle
clockwise until all slack is removed.
Tire change procedure
Preparing to change the tire
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 diagonally opposite (other side and end of the vehicle) to
the tire being changed.
1. Park on a level surface.
2. Activate the warning flashers.
3. Place the gearshift in P (Park).
4. Apply the parking brake and turn
the engine off.
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5. Block the wheel that is diagonally
opposite the tire you are changing.
On E-450 vehicles, the parking
brake is on the transmission.
Therefore, the vehicle will not be
prevented from moving when a rear
wheel is lifted, even if the parking brake is applied. Be sure to block both
directions of the wheel that is diagonally opposite to the wheel that is
being lifted.
If the vehicle slips off the jack, you or someone else could be
seriously injured.
6. Remove the spare tire and jack from the storage location.
•non-chassis cab vehicles:jack
is located in the rear right-hand
side of the cargo area.
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•chassis cab vehicles:jack is
strapped to a bracket behind the
driver’s seat.
7. Use the tapered end of the lug nut wrench to unscrew wheel
ornaments attached by retaining screws. Remove any wheel trim. Insert
the tapered end of the lug nut wrench behind wheel covers or hubcaps
and twist off.
8. Loosen the wheel nut by pulling up on the handle of the lug nut
wrench about one-half turn (counterclockwise). Do not remove the
wheel lug nuts until you raise the tire off the ground.
Replacing the tire
1. Assemble the jack handle sections together and lock into the jack. Use
the jack handle to slide the jack under the vehicle.
To lessen the risk of personal injury, do not put any part of your
body under the vehicle while changing a tire. Do not start the
engine when your vehicle is on the jack. The jack is only meant for
changing the tire.
2. Position the jack to raise the front or rear wheel.
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•Never use the front or rear
differential as a jacking point.
Rear axle jacking points - All
models except E-450 and E-550:
Rear axle jacking points - E-450
and E-550:
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Front axle jacking points - All
models except E-550:
•All models except E-550
Place the jack under thepinon the
front surface of the front axle.
Do not place the jack under or
on the steering linkage.
•Turn the jack handle clockwise
until the wheel is completely off
the ground.
•Remove the lug nuts with the lug
nut wrench.
•Replace the flat tire with the
spare tire.
Front axle jacking points -
E-550:
Place the jack under the front axle
directly below the springs.
Do not place the jack under or
on the steering linkage.
•Slide the notched end of the jack
handle over the release valve and use the handle to slide the jack
under the vehicle. Make sure the valve is closed by turning it
clockwise.
•Insert the jack handle into the
pump linkage.
•Use an up-and-down motion with
the jack handle to raise the wheel
completely off the ground.
If your vehicle has single rear wheels, thread the lug nuts on the studs
with the beveled face toward the wheel.
If your vehicle has dual rear wheels, thread the two element swiveling
lug nuts on the studs with the flange facing toward the wheel.
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