1998 FORD EXPEDITION battery

Fuse/Relay
LocationFuse Amp
RatingDescription
7 15A* Main Light Switch, Park Lamp
Relay
8 30A* Main Light Switch, Headlamp
Relay, Multi-Function Switch
9 15A* Daytime Running Lamps (DRL)
Module, Fog Lamp Relay
10 25A* I/P Auxiliary Power Socket
11 25A* Console Auxiliary Power Socket
12 10A* Rear Wiper Up Motor Relay, Rear
Wiper Down Motor Relay
13 30A** Auxiliary A/C Relay
14 60A** 4 Wheel Anti-Lock Brake System
(4WABS) Module
15 50A** Air Suspension Solid State
Compressor Relay
16 40A** Trailer Tow Battery Charge Relay,
Engine Fuse Module (Fuse 2)
17 30A** Shift on the Fly Relay, Transfer
Case Shift relay
18 30A** Power Seat Control Switch
19 20A** Fuel Pump Relay
20 50A** Ignition Switch (B4 & B5)
21 50A** Ignition Switch (B1 & B3)
22 50A** Junction Box Fuse/Relay Panel
Battery Feed
23 40A** I/P Blower Relay
24 30A** PCM Power Relay, Engine Fuse
Module (Fuse 1)
25 30A CB Junction Box Fuse/Relay Panel,
ACC Delay Relay
26 Ð Not Used
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135

Fuse/Relay
LocationFuse Amp
RatingDescription
27 40A** Junction Box Fuse/Relay Panel,
Heated Grid Relay
28 30A** Trailer Electronic Brake
Controller
29 30A** Flip Window Relay, Hybrid
Cooling Fan Relay
* Mini Fuses ** Maxi Fuses
Relays
Relays are located in the power
distribution box and should be
replaced by qualified technicians.
Primary battery fuses
(megafuses)
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136

The primary battery fuses are
located in the engine compartment
near the battery.
Ford recommends that the
megafuses are serviced by a
qualified service technician.
Location Amperage Description
1 175 Power Network Box Megafuse
2 175 Alternator Megafuse
3 20 Alternator Field Minifuse
Engine mini fuse box
20A
1
2
3
Roadside emergencies
137

JUMP STARTING YOUR
VEHICLE
The gases around the
battery can explode if
exposed to flames, sparks, or lit
cigarettes. An explosion could
result in injury or vehicle
damage.
Do not push start your
vehicle. You could damage
the catalytic converter.
Batteries contain sulfuric
acid which burns skin,
eyes, and clothing.
Preparing your vehicle
Also see the label on the battery.
1. Use only a 12±volt supply to
start your vehicle. If you connect
your battery to a 24±volt power
supply you can damage your
starter, ignition system and other
electrical components.
2. Do not disconnect the battery of
the disabled vehicle as this could
damage the vehicle's electrical
system.
3. Park the booster vehicle close to
the hood of the disabled vehicle
making sure theydo nottouch.
Set the parking brake on both
vehicles and stay clear of the
engine cooling fan and other
moving parts.
Roadside emergencies
145

4. Check all battery terminals and
remove any excessive corrosion
before you attach the battery
cables.
5. Turn the heater fan on in both
vehicles to protect any electrical
surges. Turn all other accessories
off.
Connecting the jumper cables
1. Position the vehicles so that
they do not touch one another.
2. Switch off the engine. Switch off
any unnecessary electrical
equipment.
3. Connect the positive (+)
terminal of the discharged battery
(1) to the positive (+) terminal of
the booster battery (2).
4. Connect one end of the second
lead to the negative (-) terminal of
the booster battery (3) and the
other end to a metal part of the
engine to be started (4), not to the
negative (-) terminal of the
discharged battery.
5. Make sure that the jump leads
are clear of moving parts of the
engine.
Do not connect the end of
the second cable to the
negative (-) terminal of the
battery to be jumped. A spark
may cause an explosion of the
gases that surround the battery.
+–
+–
14
3
2
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146

Jump starting
1. Start the booster vehicle and
run the engine at moderately
increased speed.
2. Start the engine of the vehicle
with the discharged battery.
3. Once the engine has been
started, run both vehicles for a
further three minutes before
disconnecting the leads.
Removing the jumper cables
1. Remove the jumper cables in
reverse order. Take the cable off
the metallic surface (1) first,
followed by the cable on the
negative (-) booster battery
terminal (2).
2. Remove the cable from the
positive (+) terminal of the booster
battery (3) and then the
discharged battery (4).
3. After the disabled vehicle has
been started, allow it to idle for a
while so the engine can ªrelearnº
its idle conditions.
+–
+–
41
2
3
Roadside emergencies
147

²Keep all lit cigarettes, open
flames and other lit material
away from the battery and all
fuel related parts.
If you disconnect the battery, the
engine must ªrelearnº its idle
conditions before your vehicle will
drive properly, as explained in
Batteryin this chapter.
Working with the engine off
1. Set the parking brake and
ensure the gearshift is securely
latched in P (Park).
2. Turn off the engine and remove
the key.
3. Block the wheels to prevent the
vehicle from moving unexpectedly.
Working with the engine on.
1. Set the parking brake and
ensure the gearshift is securely
latched in P (Park).
2. Block the wheels to prevent the
vehicle from moving unexpectedly.
Do not start your engine
with the air cleaner
removed and do not remove it
while the engine is running.
Maintenance and care
151

OPENING THE HOOD
1. Inside the vehicle, pull the hood
release handle located under the
bottom of the instrument panel.
2. Go to the front of the vehicle
and release the auxiliary latch that
is located under the front center of
the hood. Lift the hood until the
lift cylinders hold it open.
IDENTIFYING COMPONENTS IN
THE ENGINE COMPARTMENT
4.6L/5.4L engines
1. Battery
BRAKE
HOOD
109
123456
8
7
Maintenance and care
152