1998 FORD EXPEDITION relay

TRANSMISSION OPERATION
Automatic transmission
operation
Brake-shift interlock
This vehicle is equipped with a
brake-shift interlock feature that
prevents the gearshift from being
moved from P (Park) unless the
brake pedal is depressed.
If you cannot move the gearshift
out of P (Park) with the brake
pedal depressed:
1. Apply the parking brake, turn
ignition key to LOCK, then remove
the key.
2. Insert the key and turn it to
OFF. Apply the brake pedal and
shift to N (Neutral).
3. Start the vehicle.
If it is necessary to use the above
procedure to move the gearshift, it
is possible that a fuse has blown
and the vehicle's brakelamps may
not be operating properly. Refer to
Fuses and relaysin theRoadside
emergencieschapter.
Do not drive your vehicle
until you verify that the
brakelamps are working.
If your vehicle gets stuck in mud
or snow it may be rocked out by
shifting from forward and reverse
gears in a steady pattern. Press
lightly on the accelerator in each
gear.
Driving
104

seconds and return the key to the
OFF position.
5. Make a further check for leaks
in the fuel system.
The fuel pump shut-off switch is
located in the passenger's foot
well, behind the kick panel.
FUSES AND RELAYS
Fuses
If electrical components in the
vehicle are not working, a fuse
may have blown. Blown fuses are
identified by a broken wire within
the fuse. Check the appropriate
fuses before replacing any
electrical components.
1515
Roadside emergencies
128

The fuses are coded as follows.
Fuse/Relay
LocationFuse Amp
RatingDescription
1 15A Flasher Relay
2 5A Instrument Cluster, Overhead Trip
Computer (OTC) Module
3 25A Cigar Lighter
4 5A Park Lamp Relay, Headlamp
Relay, Autolamp Module, Remote
Anti-Theft Personality (RAP)
Module, Power Mirror Switch
12 22
21323
617 27
718 28
819 29
930
20
31 21 11 10
31424
41525
51626
Roadside emergencies
130

Fuse/Relay
LocationFuse Amp
RatingDescription
5 15A Digital Transmission Range (DTR)
Sensor, Daytime Running Lamps
(DRL) Module, Speed Control
Servo/Amplifier Assembly,
Heater-A/C Control Assembly,
Blend Door Actuator, Electronic
Variable Orifice (EVO) Module
6 5A Shift Lock Actuator, Generic
Electronic Module (GEM), 4
Wheel Air Suspension (4WAS)
Module, Compass Sensor, Steering
Wheel Rotation Sensor, Heated
Grid Relay, Overhead Trip
Computer (OTC) Module
7 5A Auxiliary A/C Relay, Console
Blower Motor
8 5A Radio, Main Light Switch, Remote
Anti-Theft Personality (RAP)
Module
9 Ð Not Used
10 Ð Not Used
11 30A Washer Pump Relay, Wiper
Run/Park Relay, Wiper Hi/Lo
Relay, Windshield Wiper Motor,
Rear Wiper Pump Relay
12 5A Data Link Connector (DLC)
13 15A Brake On/Off (BOO) Switch,
Brake Pressure Switch
14 15A Battery Saver Relay, Interior
Lamp Relay
15 5A Generic Electronic Module
(GEM), Passive Anti-Theft System
(PATS) Module
Roadside emergencies
131

Fuse/Relay
LocationFuse Amp
RatingDescription
16 20A Instrument Cluster (W/O DRL),
Daytime Running Lamps (DRL)
Module, Hi-Beam Headlamps
(Power supplied through
Multi-Function Switch)
17 10A Heated Backlight Switch, Left
Power/Heated Signal Mirror, Right
Power/Heated Signal Mirror
18 5A Main Light Switch, Generic
Electronic Module (GEM),
Instrument Illumination (Power
supplied through Main Light
Switch)
19 10A Instrument Cluster, Air Bag
Diagnostic Monitor
20 5A 4 Wheel Air Suspension (4WAS),
Generic Electronic Module (GEM)
21 15A Digital Transmission Range (DTR)
Sensor, Junction Box Fuse/Relay
Panel (Fuse 20)
22 10A Air Bag Diagnostic Monitor
23 10A Trailer Tow Battery Charge Relay,
4X4 Center Axle Disconnect
solenoid, 4X2 Center Axle
Disconnect Solenoid, Function
Selector Switch, Rear Integrated
Control Panel, Recirculation
Vacuum Solenoid, Auxiliary A/C
Mode Acturator, Auxiliary A/C
Control Module
24 10A Function Selector Switch
25 5A 4 Wheel Anti-Lock Brake System
(4WABS) Module, 4WABS Relay
Roadside emergencies
132

Fuse/Relay
LocationFuse Amp
RatingDescription
26 10A Daytime Running Lamps (DRL)
Module, Right Headlamp (Power
supplied through Multi-Function
Switch)
27 5A Main Light Switch, Fog Lamp
Relay
28 10A Left Headlamp
29 5A Autolamp Module, Instrument
Cluster, Transmission Control
Switch (TCS)
30 30A Radio Noise Capacitor, Ignition
Coil, PCM Power Diode, Coil On
Plugs
31 Ð Not Used
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.
Always replace the cover
to the Power Distribution
Box before reconnecting the
battery or refilling fluid
reservoirs.
Roadside emergencies
133

The high-current fuses are coded
as follows.
Fuse/Relay
LocationFuse Amp
RatingDescription
1 20A* Trailer Tow Running Lamp Relay,
Trailer Tow Backup Lamp Relay
2 10A* Air Bag Diagnostic Monitor
3 30A* All Unlock Relay, All Lock Relay,
Driver's Unlock Relay
4 15A* Air Suspension Service Switch
5 20A* Horn Relay
6 30A* Radio, Premium Sound Amplifier,
CD Changer, Rear Integrated
Control Panel, Sub-Woofer Power
(Fuse 3 & Fuse 5)
19 29
18 28EEC
POWER
RELAY
FUEL
PUMP
RELAY
FRONT
WASHER
PUMP HORN
RELAY 17 27
16 26
15 25
14 24
13
11 12
910
78
56
34
1223
22
21
20
W/S/W
RUN/
PARKW/S/W
HI/LO
Roadside emergencies
134

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
Roadside emergencies
135