All Wiring Diagrams for Ford Expedition 1998

AIR CONDITIONING

Air Conditioning Wiring Diagrams (1 of 2) for Ford Expedition 1998

List of elements for Air Conditioning Wiring Diagrams (1 of 2) for Ford Expedition 1998:

(heater blower motor feed harness, in breakout to blower motor resistor) s125
(interior lamp feed harness, near breakout to in-line connector, left front of left rear wheelwell)
(interior lamp feed harness, near breakout to left side rail lamp) s918
(lower right kick panel inner) g203
(main harness in breakout to fuse/relay panel)
(main harness, near breakout to in-line connector) s279
(main harness, near breakout to instrument cluster) s222
(main harness, near breakout to rpo relay block)
(near fuel tank) g402
87a
Auxiliary a/c blend actuator (behind left rear side panel)
Auxiliary a/c control module (behind left rear side panel)
Auxiliary a/c mode actuator (behind left rear side panel)
Blend door actuator (behind center of dash)
Blend door pot
Blower motor (right side of engine compartment)
Blower motor switch
Blower relay
Blower/flasher relay block (behind center of dash)
C217
C218
C219
C220
C242
C243
Cold
Def
Def/flr
Floor
Flr & def
Front blend potentiometer (in center of headliner)
Front mode potentiometer (in center of headliner)
Function selector switch
Fuse 10a
Fuse 15a
Fuse 40a
Fuse 5a
Hot at all times
Hot in run
Illumination
Interior lights system
Junction box fuse/ relay panel
Max a/c
Med hi
Med lo
Mode selector switch
Norm a/c
Off
Pan & flr
Pan/flr
Panel
Power distribution box
Rear blend potentiometer (in center of headliner)
Rear mode potentiometer
Red
S202 (main harness, in breakout to blower/ flasher relay block)
S203
S228
S422 (seat belt retractor harness, near breakout to auxiliary a/c mode switch)
S424 (seat belt retractor harness, near breakout to rpo relay box)
S919
S920 (interior lamp feed harness, near breakout to in-line connector, left front of left rear wheelwell)
S921 (interior lamp feed harness, near breakout to in-line connector, left front of left rear wheelwell)
Solid state
Warm

Air Conditioning Wiring Diagrams (2 of 2) for Ford Expedition 1998

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List of elements for Air Conditioning Wiring Diagrams (2 of 2) for Ford Expedition 1998:

(engine control sensor harness, near breakout to octane adjust)
(lower right kick panel inner) g203
(near fuel tank) g414
(near fuel tank) g415
.6 ohms
0.6 ohms
0ff
2.7 ohms
3.8 ohms
87a
A/c clutch cycling pressure switch (right rear corner of engine compartment)
A/c clutch diode (taped in harness, near a/c compressor clutch)
A/c compressor clutch solenoid (right side of engine compartment)
A/c pressure cut off switch (right side of engine compartment)
Accs
Auxiliary a/c blower motor (rear floor panel)
Auxiliary a/c blower motor resistor (behind left rear side panel)
Auxiliary a/c relay
Blower motor resistor (near blower motor)
Console blend door actuator (left center of floor console)
Console blower motor (inside center of floor console)
Console blower motor resistor (inside center of floor console)
Front blower motor switch
Fuse 30a
G105 (rear of right fender apron)
Hot at all times
Med
Nca
Off
Ohms
Power distribution box
Powertrain control module (pcm) (right side of engine compartment)
Rear
Rear blower motor switch
Rear integrated control panel (ricp) (rear blower switch)
Red/pnk
Rpo relay box no.2 (in dash, above passenger airbag)
S126
S200 (main harness, near breakout to in-line connector, behind right side of dash)
S322 (console panel harness, near breakout to console blower motor)
S423 (seat belt retractor harness, near breakout to auxiliary a/c mode blower resistor assembly)
S424 (seat belt retractor harness, near breakout to rpo relay box)
S916 (interior lamp feed harness, near breakout to left side rail lamp)

ANTI-LOCK BRAKES

Anti-lock Brake Wiring Diagrams for Ford Expedition 1998

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List of elements for Anti-lock Brake Wiring Diagrams for Ford Expedition 1998:

4 wheel anti-lock brakes system (4wabs) module (left side of engine compt)
4 wheel drive input
4wabs ind ctrl
4wabs relay
4wabs relay cctrl
Abs active out
Anti-lock brake ind
Brake fluid level switch (on brake fluid reservoir)
Brake fluid lvl
Brake ind
Brake on/off switch
Brake pedal position switch (below left side of dash)
C146
C147
C242
C243
Data link connector (left side of dash)
Diagnostic trigger
Differential speed sensor (on rear axle)
Fuse 15a
Fuse 5a
Fuse 60a
G108 (left front radiator support)
Generic electronic module
Ground
Hot at all times
Hot in run
Hot in run or start
Ignition feed
Instrument cluster
Instrument cluster system
Junction box fuse/relay panel
Left front sensor (high)
Left front sensor (low)
Left front wheel speed sensor (at wheel)
Left rear of engine compt)
Power (b+)
Power distribution box
Rear sensor (high)
Rear sensor (low)
Red brake input
Red/pnk
Right front sensor (high)
Right front sensor (low)
Right front wheel speed sensor (at wheel)
S106
S121
S144 (engine control sensor harn, left side of engine compartment)
S225
S229
Tan/red

ANTI-THEFT

Forced Entry Wiring Diagram for Ford Expedition 1998

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List of elements for Forced Entry Wiring Diagram for Ford Expedition 1998:

(body harn, near breakout to in-line conn, near right side of dash) s254
(body harn, near breakout to rap module) s234
(main harness, near breakout to secure lock)
(main harness, right side of dash)
All lock
All unlock
Antenna
Boo switch
Brake on/off switch (behind left side of dash)
C242
C256
C257
Data link connector (behind center of dash)
Datalink
Digital transmission range sensor (below center of vehicle, left side of transmission)
Disable
Door ajar
Door ajar out
Driver's unlock relay (behind right side of dash)
Drvr unlock
Electronic suspension
Ext lights
Exterior lights
Fuse 15a
Fuse 30a
Fuse 5a
G200 (lower left kick panel)
G203 (lower right kick panel)
Generic electronic module (gem) (under left side of dash)
Ground
Horn
Horns system
Hot at all times
Hot in run
Hot in run or acc
Ignition
Illum entry in
Int lights
Interior lights system
Junction box fuse/ relay panel
Left front power door lock switch
Lock
Mem seat
Mem seat 1
Mem seat 2
Memory seat and mirror module (under driver's seat)
Memory systems
Nca
Not used
Power
Power distribution box (left side of engine compt)
Remote anti-theft personality (rap) module (behind left side of dash)
Right front power door lock switch
S112
S216
S219
S223
S229 (main harn, near breakout to evo module)
S231 (main harn, near breakout to inst cluster)
S235 (body harn, near breakout to rap module)
S236
S248
S250
S263 (main harn, near left kick panel)
S268 (main harn, near breakout to evo module)
S500
S501
S600
Trans in
Unlock

Passive Anti-theft Wiring Diagram for Ford Expedition 1998

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List of elements for Passive Anti-theft Wiring Diagram for Ford Expedition 1998:

(main harn, right side of dash) s276
Anti- theft indicator
Anti-theft transceiver module (behind dash)
Armed sig
Bus (+)
Bus (-)
C236
C243
Datalink connector (behind center of dash)
Expedition
Fuse 30a
Fuse 5a
G123 (right rear of engine compt)
G203 (lower right kick panel)
Grd
Hot at all times
Hot in run or start
Ign
Instrument cluster
Junction box fuse/ relay panel
Navigator
Passive anti-theft system (pats) control module (behind center of dash)
Powertrain control module (pcm) (right side of engine compt)
Pwr
Rec sig
Rf grd
Rf pwr
S204
S266
S275 (main harn, right side of dash)
S277
Transmit

BODY COMPUTER

Body Computer Wiring Diagrams (1 of 2) for Ford Expedition 1998

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List of elements for Body Computer Wiring Diagrams (1 of 2) for Ford Expedition 1998:

87a
Accessory delay relay
Accessory delay relay ctrl
Battery saver relay
Battery saver relay ctrl
C242
C243
C267
Electronic suspension system
Engine controls system
Fuse 15a
Fuse 30a
Fuse 5a
G200 (lower left kick panel)
G203 (lower right kick panel)
Generic electronic module (gem)
Ground
Heated grid relay
Heated grid relay ctrl
Hot at all times
Hot in
Hot in run
Hot in run or acc
Ign (start) gnd (park/neutral)
Ignition (acc/run)
Ignition (run)
Instrument cluster system
Interior lamp relay
Interior lamp relay ctrl
Interior lights system
Junction box fuse/ relay panel (under left side of dash)
Lf window motor sense (high)
Lf window motor sense (low)
Lf window switch in (down)
Lf window switch in (up)
One touch down relay
One touch down relay ctrl
One touch down switch in
Power (b+)
Power distribution box (left side of engine compt)
Power windows system
Running lamp relay ctrl
S205
S207
Start
Vehicle speed (+)

Body Computer Wiring Diagrams (2 of 2) for Ford Expedition 1998

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List of elements for Body Computer Wiring Diagrams (2 of 2) for Ford Expedition 1998:

(main harn, near gem) s233
(not used)
(park/headlamps on) in
4 high to 4 low relay ctrl
4 low to 4 high relay ctrl
4x2 center axle solenoid ctrl
4x4 center axle solenoid ctrl
4x4 high range ind ctrl
4x4 low range ind control
4x4 mode switch in
A4wd indicator ctrl
Abs active in
Air suspension out
Anti-lock brakes system (abs control module)
Anti-theft system (rap module)
Brake on/off switch
C239
C240
C241
Computer data lines system (datalink pin 7)
Contact plate a in
Contact plate b in
Contact plate c in
Contact plate d in
Defogger system (rear defogger switch)
Diagnostic link
Door ajar indicator ctrl
Door ajar out
Electronic suspension system (4was module)
Exterior lights system (brake on/off switch)
Front shaft speed sensor in
G200 (lower left kick panel)
Generic electronic module (gem) (under left side of dash)
Ground
Hall effect speed sensor out
Ignition key warning switch in
Illuminated entry request in
Instrument cluster system (i/c c236 pin 2)
Instrument cluster system (i/c c236 pin 3)
Instrument cluster system (i/c c236 pin 4)
Instrument cluster system (i/c c236 pin 5)
Instrument cluster system (i/c c238 pin 11)
Instrument cluster system (i/c c238 pin 9)
Instrument cluster system (washer fluid level switch)
Interval delay/wash in
Lf door ajar switch in
Liftgate and glass ajar in
Low washer fluid out
Lr door ajar switch in
Rear shaft speed sensor in
Rear washer pump relay out
Rear window defrost switch in
Rear wiper relay ctrl (down)
Rear wiper relay ctrl (up)
Rear wiper sense (hi/low/park)
Rear wiper switch in
Red
Rf door ajar switch in
Rr door ajar switch in
S208
Seat belt indicator ctrl
Seat belt warning switch in
Signal return
Tan
Tan/red
Torque on demand relay out
Trans in neutral in
Trans low range out
Transfer case return
Transmission controls system (4 wheel drive mode switch)
Transmission controls system (4wd mode switch)
Transmission controls system (4x2 axle disconnect solenoid)
Transmission controls system (4x4 axle disconnect solenoid)
Transmission controls system (pcm c174 pin 14)
Transmission controls system (torque on demand relay)
Transmission controls system (transfer case assembly)
Transmission controls system (transfer case shift relays)
Transmission controls system (transmission range sensor)
Warning systems (ignition key warning switch)
Warning systems (lf door ajar switch)
Warning systems (liftgate & glass ajar switches)
Warning systems (lr door ajar switch)
Warning systems (main light switch)
Warning systems (rf door ajar switch)
Warning systems (rr door ajar switch)
Warning systems (seat belt switch)
Washer fluid level switch in
Washer pump ctrl
Wiper hi/lo relay ctrl
Wiper mode select switch in
Wiper motor park sense
Wiper run/park relay ctrl
Wiper/washer system (hi/lo relay)
Wiper/washer system (multi-function switch)
Wiper/washer system (rear washer pump relay)
Wiper/washer system (rear wiper down relay)
Wiper/washer system (rear wiper motor)
Wiper/washer system (rear wiper up relay)
Wiper/washer system (run/park relay)
Wiper/washer system (washer pump relay)

COMPUTER DATA LINES

Computer Data Lines for Ford Expedition 1998

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List of elements for Computer Data Lines for Ford Expedition 1998:

(main harn, near breakout to evo module) s229
(under center of dash) data link connector (dlc)
4 wheel air suspension (4was) module (behind center of dash)
4 wheel anti-lock brake system (4wabs) control module (on left side of engine compt)
Air bag diagnostic monitor (behind right side of dash)
C208
C239
C242
C256
C296
Dlc
Dlc bus (+)
Dlc bus (-)
Fuse 12 5a
G123 (rear of engine compt)
G203 (lower right kick panel)
Generic electronic module (gem) (under left side of dash)
Hot at all times
Junction box fuse/ relay panel (under left side of dash)
Passive anti-theft system (pats) module (behind center of dash)
Powertrain control module (pcm) (right side of engine compt)
Remote anti-theft personality (rap) module (behind left side of dash)
S202
S266

CRUISE CONTROL

Cruise Control Wiring Diagram for Ford Expedition 1998

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List of elements for Cruise Control Wiring Diagram for Ford Expedition 1998:

15a
20a
Accel
Brake pedal position (bpp) switch (under left side of dash)
Brake press in
Brake pressure switch (left rear corner of engine compt)
C233
C234
C239
C242
C257
Clock- spring assembly (top of steering column)
Coast
Control sw gnd
Control sw in
Driver's airbag
Fuse 13
Fuse 5
G105 (rear of right fender apron)
G200 (lower left kick panel)
G203 (lower right kick panel)
Generic electronic module (gem) (under left side of dash)
Ground
Horn relay (in power distribution box)
Horn switches
Hot at all times
Hot in run
Ign
Ignition key warning switch
Interior lights system
Junction box fuse/relay panel
Nca
Off
Ohms
Power distri- bution box
Remote anti-theft personality (rap) module (behind left side of dash)
Resume
S102
S107
S112
S143 (engine sensor harn, near breakout to windshield wiper motor)
S144 (engine sensor harn, left rear of engine compt)
S202
S231 (main harn, near breakout to instrument cluster)
Set/
Speed control servo/ amplifier assembly (in left side of engine compt)
Speed control switch assembly
Steering assembly
Steering column ground
Vehicle speed input
Vehicle speed sensor (vss) (left rear of trans)

DEFOGGERS

Defogger Wiring Diagram for Ford Expedition 1998

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List of elements for Defogger Wiring Diagram for Ford Expedition 1998:

(main harn, right side of dash) s259
87a
C239
C242
C243
C267
Defrost relay control
Defrost switch input
Fuse 17 10a
Fuse 27 40a
Fuse 6 5a
G203 (lower right kick panel)
G402 (left rear wheelwell
Generic electronic module (under left side of dash)
Heated grid relay
Hot at all times
Hot in run
Interior lights system
Junction box fuse/relay panel (under left side of dash) of dash)
Left power/ heated mirror
Nca
On indicator
On/off switch
Power distribution box (left side of engine compartment)
Rear heated window switch
Rear window defrost grid
Right power/ heated mirror
S204
S402
S427 (rear window regulator harn, near breakout to rear window defrost grid)
S500
S501
S600
Switch illum

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram, with Air Suspension for Ford Expedition 1998

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List of elements for Electronic Power Steering Wiring Diagram, with Air Suspension for Ford Expedition 1998:

(main harn, near breakout to 4 wheel air susp mod) s270
(main harn, near breakout to evo module) s267
(main harn, near breakout to evo module) s273
(not used)
Air suspension/ evo steering module (behind center of dash)
C242
C243
C295
C296
Engine controls
Evo actuator (left side of engine compt)
Evo module
Expedition only
Fuse 5a
G200 (lower left kick panel)
G203 (lower right kick panel)
Generic electronic module (gem)
Ground
Hot in run
Hot in start
Instrument cluster
Junction box fuse/ relay panel
Memory systems
Nca
Power (hot in run)
Power (start)
Red
S207
S210
S265
S269 (main harn, near breakout to evo module)
S271 (main harn, near breakout to evo module)
Steering sensor
Steering wheel rotation sensor (behind steering wheel, in dash)
Vehicl speed (+)
Vehicle speed sensor (on rear of trans)

Electronic Power Steering Wiring Diagram, without Air Suspension for Ford Expedition 1998

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List of elements for Electronic Power Steering Wiring Diagram, without Air Suspension for Ford Expedition 1998:

(eng control sensor harn, near breakout to wiper motor)
(main harn, near breakout to evo module)
(not used)
(right side of dash)
C242
C243
Diagnostic input
Electronic variable orifice (evo) module (behind center of dash)
Evo actuator (left side of engine compt)
Evo test connector
Fuse 15a
G200 (lower left kick panel)
G203 (lower right kick panel)
Generic electronic module
Ground
Hot in run
Ignition
Instrument cluster
Junction box fuse relay panel left side of dash)
Red
S107
S143
S203
S207
S208
S222
S265
S267
S269
S270
S271 s271
S273
Steering act power
Steering act return
Steering rot input
Steering wheel rotation sensor (behind steering wheel, in dash)
Vehicle speed sensor (left rear of transmission)
Vss gnd
Vss in

ELECTRONIC SUSPENSION

Electronic Suspension Wiring Diagram (1 of 2) for Ford Expedition 1998

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List of elements for Electronic Suspension Wiring Diagram (1 of 2) for Ford Expedition 1998:

(main harn, near breakout to 4was module) s272
4x4 low sig
Air suspension compressor motor and vent solenoid (right radiator support)
Air suspension compressor relay (near right headlamp)
Air suspension indicator
Air suspension service switch (behind right side of dash)
Air suspension/ evo steering module (behind center of dash)
All wheel drv
Brake on/off sw
C237
C242
C243
C295
C296
Comp mtr vent sol
Compressor relay
Data link connector (under center of dash)
Datalink
Door ajar in
Evo module
Front air fill solenoid
Front fill sol
Front gate sol
Front gate solenoid
Front height sen
Fuse 15a
Fuse 50a
Fuse 5a
G108 (left front radiator suport)
G109 (right front radiator suport)
G109 (right front radiator support)
G200 (lower left kick panel)
G203 (lower right kick panel)
Ground
Height sen power
Hot at all times
Hot in run
Hot in start
Instrument cluster
Junction box fuse/ relay panel
Left rear air spring solenoid
Lr spring sol
Memory systems
Pcm accel sig
Pnk
Power (hot in run)
Power (start)
Power distribution box
Rear air fill solenoid
Rear fill sol
Rear height sen
Red
Right rear air spring solenoid
Rr spring sol
S104
S155
S177
S210
S229 (main harn, near breakout to evo module)
S265
S400
Service switch
Solid state
Steering sensor
Tan
Transmission controls
Vehicl speed (+)
Warning indicator

Electronic Suspension Wiring Diagram (2 of 2) for Ford Expedition 1998

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List of elements for Electronic Suspension Wiring Diagram (2 of 2) for Ford Expedition 1998:

(main harn, near breakout to 4 wheel air susp mod) s270
(main harn, near breakout to evo module) s267
(main harn, near breakout to evo module) s273
(not used)
(rear lamp harn, near breakout to front height sensor)
(rear lamp harn, near breakout to front height sensor) s410 or s310
Brake on/off switch (on brake pedal)
Breakout to inst cluster)
C174
C240
C241
C256
Engine controls
Evo actuator (left side of engine compt)
Expedition only
Front height sensor (behind left running board)
Fuse 15a
G200 (lower left kick panel)
Generic electronic (gem) module (behind center of dash)
Generic electronic module (gem)
Hot at all times
Instrument cluster
Junction box fuse/ relay panel
Nca
Powertrain control module (pcm) (right side of engine compt)
Rear height sensor (rear floor panel)
Red
Remote anti-theft personality (rap) module (behind left side of dash)
S207
S268 (main harn, near breakout to evo module)
S269 (main harn, near breakout to evo module)
S271 (main harn, near breakout to evo module)
S409 or s311
Steering wheel rotation sensor (behind steering wheel, in dash)
Tan
Vehicle speed sensor (on rear of trans)

ENGINE PERFORMANCE

4.6L

4.6L, Engine Performance Wiring Diagrams (1 of 4) for Ford Expedition 1998

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List of elements for 4.6L, Engine Performance Wiring Diagrams (1 of 4) for Ford Expedition 1998:

(engine control harn, near breakout to pcm)
(engine control sensor harn, in breakout to 42-pin conn, right rear of eng compt)
(engine control sensor harn, near breakout to vapor management valve)
(fuel charge harn, near breakout of 42-pin conn in right rear of engine compt)
(fuel charge harn, near breakout to radio noise cap 1) s118
(fuel charge harn, near breakout to radio noise cap 2) s119
(left radiator support) g108
(lower left kick panel) g200
(rear of engine compt) g123
* expedition
** f150/f250 light duty
4x4 low ind sw
820 ohms
Accel sig
Accs
Air conditioning system
Body computer system
C243
Case gnd
Ckp(+)
Ckp(-)
Data link (+)
Data link (-)
Data link connector (partial) (center of dash)
Digital transmission range sensor (dtr sensor) (left side of transmission)
Ect
Ect gauge
Electronic suspension system
Engine fuse module (left side of engine compt)
Evr ctrl
Feps (eprom)
Fp sending unit
Fuel pump mon
Fuse 30a
Fuse 5a
Hot at all times
Hot in run or start
Iat
Ign coil 1
Ign coil 2
Ignition coils 1 & 2
Ignition coils 3 & 4
Instrument cluster system
Intake manifold
Intake manifold communicator control (right side of engine)
Junction box fuse/relay panel (under left side of dash)
Maf
Mil
Nca
Not used
O/d off
Octane adjust
Otc module
Pcm power diode
Pcm power relay
Power distribution box (left side of engine compt)
Powertrain control module (right side of engine compt)
Pwr gnd
R n
Radio noise capacitor 1
Radio noise capacitor 2
Red
Rr ho2s sig (12)
S100
S106
S107
S116 (engine control sensor harn, near breakout to engine fuse module)
S117
S127
S128
S130
S225
S277
Shift sol 1 (a/t)
Shift sol 2 (a/t)
Spark plugs
Tach out
Tcs (a/t)
Tft
To dtr sensor (diagram 4 of 4)
Tr1
Tr2a
Tr4a
Transmission control indicator lamp
Transmission control switch (a/t)
Vss (-)

4.6L, Engine Performance Wiring Diagrams (2 of 4) for Ford Expedition 1998

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List of elements for 4.6L, Engine Performance Wiring Diagrams (2 of 4) for Ford Expedition 1998:

(engine control sensor harn, near breakout to 35-pin conn in left rear of engine compt)
(engine control sensor harn, near breakout to 38-pin conn in right rear of engine compt)
(fuel charge harn, near breakout to starter motor relay) s137
(lower left kick panel)
(speedometer/ odometer) vehicle speed input
(under left side of dash) junction box fuse/relay panel
C236
C237
C243
C267
Crankshaft position sensor (lower front of engine)
Crankshaft position sensor shield
Differential pressure feedback egr sensor (left side of engine)
Electronic suspension system
Engine coolant temperature gauge
Engine coolant temperature sender (left front corner of engine)
Engine coolant temperature sensor (front of engine)
Fuel pump relay
Fuel reset switch indicator
Fuel tank pressure sensor (at fuel tank)
Fuse 20a
G123 (rear of engine compt)
G200
Generic electronic module/ central timer module
Hot at all times
Instrument cluster
Intake air temperature sensor (on intake manifold)
Malfunction indicator
Nca
Octane adjust shorting bar (right rear corner of engine compt)
Power distribution box (left side of engine compt)
Red
Red/pnk
S101 (engine control harn, in breakout to pcm)
S123 (engine control harn, near breakout to starter motor relay)
S135 (fuel charge harn, near breakout to radio noise capacitor)
S136 (fuel charge harn, near breakout to fuel injector 3)
S138
S139
S207
Tachometer
Throttle position sensor (attached to throttle body)
Vss input

4.6L, Engine Performance Wiring Diagrams (3 of 4) for Ford Expedition 1998

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List of elements for 4.6L, Engine Performance Wiring Diagrams (3 of 4) for Ford Expedition 1998:

(backup lamp sw to rear lamp feed harn, at breakout to 38-pin conn in right rear of engine compt)
(fuel charge harn, near breakout to 42-pin conn in right rear of engine compt)
(fuel tank) fuel pump module
(right side of dash) inertia fuel shut-off switch
4r70w transmission
Egr vacuum regulator solenoid (left side of engine)
Electronic pressure control solenoid
Evap canister purge
Fuel injectors
G108 (left front radiator support)
Idle air control valve (on left side of intake manifold)
Instrument cluster system
Nca
Output shaft speed sensor (left side of transmission)
Red
Red/pnk
S129
S131 (fuel charge harn, near breakout to radio noise capacitor)
S140
S141 (backup lamp sw to rear lamp feed harn, in breakout to 38-pin conn in right rear engine compt)
S400
Shift solenoids
Ss1
Ss2
Tan
Tan/ red
Tan/red
Torque converter clutch solenoid
Transmission fluid temperature sensor
Valve (left rear corner of engine compt)

4.6L, Engine Performance Wiring Diagrams (4 of 4) for Ford Expedition 1998

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List of elements for 4.6L, Engine Performance Wiring Diagrams (4 of 4) for Ford Expedition 1998:

(engine ctrl sensor harn, near breakout c165, windshield wiper motor) s143
(front of left head) cylinder head temperature sensor
(left rear of engine compt) speed control servo/amplifier assembly
(left rear of transmission) vehicle speed sensor
(main harn, near breakout to instrument cluster)
(near fuel tank) canister vent solenoid
(right side of engine) knock sensor
5v ref volt
A/t
Brake on/off
Brake on/off switch
C242
Cam pos in
Camshaft position sensor (left front of engine)
Camshaft position sensor shield
Canister vent
Cyl head temp
Digital transmission range sensor (dtr sensor-a/t) (left side of transmission)
Dpfe sens
Dtr sens
Epc sol
From dtr sensor (diagram 1 of 4)
Fuel inj 1
Fuel inj 2
Fuel inj 3
Fuel inj 4
Fuel inj 5
Fuel inj 6
Fuel inj 7
Fuel inj 8
Fuel pump ctrl
Fuel tank press
Fuse (m/t only) 5a
Fuse 15a
G123 (rear of engine compt)
G123 (rear of engine compt)
G200 (lower left kick panel)
Heated oxygen sensor (ho2s 11) (lower right rear of engine)
Heated oxygen sensor (ho2s 12) (right rear of transmission)
Heated oxygen sensor (ho2s 21) (lower left rear of engine)
Heated oxygen sensor (ho2s 22) (left rear of transmission)
Heater ctrl
Hot at all times
Hot in start, with clutch disengaged
Iac sol
Ign coil 3
Ign coil 4
Junction box fuse/ relay panel (under left side of dash)
Kap b(+)
Knock sensor
Lf ho2s
Lf ho2s sig (21)
Lr ho2s
Lr ho2s sig (22)
M/t
Maf sens in
Mass air flow sensor (right side of engine compt, in air cleaner assembly)
Nca
Oss (+) (a/t)
Powertrain control module (right side of engine compt)
Pwr gnd
Red
Red/pnk
Rf ho2s
Rf ho2s sig (11)
Rr ho2s
S100
S101
S107
S231
Sig rtn
Tan
Tan/red
Tcc sol
Tp sens in
Trans ctrl ind
Vapor valve
Vpwr
Vss (+)
Vss input

5.4L

5.4L, Engine Performance Wiring Diagrams (1 of 4) for Ford Expedition 1998

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List of elements for 5.4L, Engine Performance Wiring Diagrams (1 of 4) for Ford Expedition 1998:

(engine control harn, near breakout to pcm)
(engine control sensor harn, near breakout to vapor management valve)
(expedition)
(fuel charge harn, in breakout to fuel injector 3)
(fuel charge harn, in breakout to fuel injector 7)
(fuel charge harn, near breakout to 42-pin inline conn in right rear of engine compt)
(left radiator support) g108
(lower left cowl panel) g201
(overhead console)
(rear of engine compt)
4x4 low ind sw
A/c on sig
Air conditioning system
Air suspn vss
Body computer system
C243
Case gnd
Ckp (+)
Ckp (-)
Data link (+)
Data link (-)
Data link connector (partial) (center of dash)
Digital transmission range sensor (dtr sensor) (left side of transmission)
Dtr-tr1
Dtr-tr2
Dtr-tr4
E4od ccs
E4od ss1
E4od ss2
Ect
Electronic suspension system
Engine fuse module (left side of engine compt)
Evr sol
Feps (eprom)
Fp sending unit
Fuel pump mon
Fuse 30a
Fuse 5a
G123
Hot at all times
Hot in run or start
Iat
Ign coil 1
Ign coil 3
Ign coil 5
Ign coil 6
Ignition coils
Instrument cluster system
Intake tune vlv
Junction box fuse/relay panel (under left side of dash)
Maf
Mil
Nca
O/d off
Octane adjust
Od off ind
Ohms
Otc module
Pcm power diode
Pcm power relay
Power distribution box (left side of engine compt)
Powertrain control module (right side of engine compt)
Pwr gnd
R n
Radio noise capacitor
Red
Rr ho2s (12)
S100
S106
S107
S116
S117
S127
S128
S161
S162
S225
Tach
Tcs
Tft
To dtr sensor (diagram 4 of 4)
Transmission control indicator lamp
Transmission control switch
Vss (-)

5.4L, Engine Performance Wiring Diagrams (2 of 4) for Ford Expedition 1998

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List of elements for 5.4L, Engine Performance Wiring Diagrams (2 of 4) for Ford Expedition 1998:

(engine control sensor harn, near breakout to 35-pin conn in left rear of engine compt) s139
(engine control sensor harn, near breakout to 38-pin conn in right rear of engine compt)
(lower left kick panel)
(speedometer/ odometer) vehicle speed input
(under left side of dash) junction box fuse/relay panel
C236
C237
C243
C267
Crankshaft position sensor (lower front of engine)
Crankshaft position sensor shield
Differential pressure feedback egr sensor (left side of engine)
Electronic suspension system
Engine coolant temperature gauge
Engine coolant temperature sender (left front corner of engine)
Fuel pump relay
Fuel reset switch indicator
Fuel tank pressure sensor (at fuel tank)
Fuse 20a
G123 (rear of engine compt)
G200
Generic electronic module/ central timer module
Hot at all times
Instrument cluster
Intake air temperature sensor (on intake manifold)
Knock sensor (top right rear side of engine)
Knock sensor shield
Malfunction indicator
Nca
Octane adjust shorting bar (right rear corner of engine compt)
Power distribution box (left side of engine compt)
Red
Red/pnk
S101 nca
S123 (engine control harn, near breakout to starter motor relay)
S135 (fuel charge harn, near breakout to radio noise capacitor)
S136 (fuel charge harn, near breakout to fuel injector 3)
S137 (fuel charge harn, near breakout to starter motor relay)
S138
S199 nca
S207
Tachometer
Throttle position sensor (attached to throttle body)
Vss input

5.4L, Engine Performance Wiring Diagrams (3 of 4) for Ford Expedition 1998

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List of elements for 5.4L, Engine Performance Wiring Diagrams (3 of 4) for Ford Expedition 1998:

(backup lamp sw to rear lamp feed harn, at breakout to 38-pin conn in right rear of engine compt)
(backup lamp sw to rear lamp feed harn, in breakout to 38-pin conn in right rear engine compt)
(fuel charge harn, near breakout to 42-pin conn in right rear of engine compt)
(fuel tank) fuel pump module
(right side of dash) inertia fuel shut-off switch
Coast clutch solenoid
E4od transmission
Egr vacuum regulator solenoid (left side of engine)
Electronic pressure control solenoid
Fuel injectors
G108 (left front radiator support)
Idle air control valve (on left side of intake manifold)
Instrument cluster system
Intake manifold tuning valve (on left side of engine)
Nca
Red
Red/pnk
S129
S131 (fuel charge harn, near breakout to radio noise capacitor)
S140
S141
S400
Shift solenoid
Tan
Tan/ red
Tan/red
Torque converter clutch solenoid
Transmission fluid temperature sensor
Vapor management valve (vmv) (left rear corner of engine compt)

5.4L, Engine Performance Wiring Diagrams (4 of 4) for Ford Expedition 1998

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List of elements for 5.4L, Engine Performance Wiring Diagrams (4 of 4) for Ford Expedition 1998:

(engine control sensor harn, near breakout to c165, windshield wiper motor)
(front of left head) cylinder head temperature sensor
(left rear of engine compt) speed control servo/amplifier assembly
(left rear of transmission) vehicle speed sensor
(main harn, near breakout to 16-pin inline conn behind left side of dash)
(near fuel tank) canister vent solenoid
270 ohms
5v ref
Brake on/off
Brake on/off switch
C242
Camshaft position sensor (left front of engine)
Camshaft position sensor shield
Canister vent
Cmp sensor
Cyl head temp
Digital transmission range sensor (dtr sensor-a/t) (left side of transmission)
Dpfe sens
Dtr-tr3a
Epc sol
From dtr sensor (diagram 1 of 4)
Fuel inj 1
Fuel inj 2
Fuel inj 3
Fuel inj 4
Fuel inj 5
Fuel inj 6
Fuel inj 7
Fuel inj 8
Fuel pump ctrl
Fuel tank press
Fuse 15a
G123 (rear of engine compt)
G200 (lower left kick panel)
Heater ctrl
Hot at all times
Idle air ctrl
Ign coil 2
Ign coil 4
Ign coil 7
Ign coil 8
Junction box fuse/relay panel (under left side of dash)
Kap b(+)
Knock sensor
Left front heated oxygen sensor (ho2s 21) (lower left rear of engine)
Left rear heated oxygen sensor (ho2s 22) (left rear of transmission)
Lf ho2s
Lf ho2s sig (21)
Lr ho2s
Maf sens in
Mass air flow sensor (right side of engine compt, in air cleaner assembly)
Nca
Powertrain control module (right side of engine compt)
Pwr gnd
Red
Red/pnk
Rf ho2s
Rf ho2s sig (11)
Rf ho2s sig (22)
Right front heated oxygen sensor (ho2s 11) (lower right rear of engine)
Right rear heated oxygen sensor (ho2s 12) (right rear of transmission)
Rr ho2s
S100
S101
S107
S143
S199
S231
Sig rtn
Tan
Tan/red
Tcc sol
Tp sens in
Vapor valve
Vpwr
Vss (+)
Vss input

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for Ford Expedition 1998

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List of elements for Back-up Lamps Wiring Diagram for Ford Expedition 1998:

C242
C256
Digital transmission range (dtr) sensor left side of transmission)
Exterior lamps (trailer tow backup lamp relay)
Fuse 5 15a
G414 (near fuel tank)
Hot in run
Junction box fuse/relay panel (under left side of dash)
Left backup lamp
Remote anti-theft personality module (behind left side of dash)
Right backup lamp
S112
S150 (eng control sens harn, left rear of eng compt)
S263 (main harn, near left kick panel)
S414
S417
S421 (seat belt retractor harn, near seat belt warning switch breakout)

Exterior Lamps Wiring Diagram for Ford Expedition 1998

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List of elements for Exterior Lamps Wiring Diagram for Ford Expedition 1998:

(engine ctrl sensor harn, near breakout to brake pressure switch) s115
(main harn, near breakout to cooling fan) s260
(main harn, near breakout to steering wheel rotation sensor) s246
(main harn, near breakout to steering wheel rotation sensor) s247
(main harn, near breakout to steering wheel rotation sensor) s261
(seat belt harn, near breakout to right license lamp) s416
(seat belt harn, near breakout to seat belt switch) s403
Autolamp module (behind center of dash)
Blower/ flasher relay block (behind center of dash)
Brake pedal position switch (under left side of dash)
C216
C237
C242
C243
Flasher relay
Fuse 10a
Fuse 15a
Fuse 5a
G109 (right front radiator support)
G203 (lower right kick panel)
G402 (left rear wheelwell)
Hazard
Head
High mount stop lamp 1
High mount stop lamp 2
High mount stop lamp 3
Hot at all times
Hot in run
Instrument cluster
Junction box fuse/relay panel (under left side of dash)
Lamp harn, in breakout to hi mount stop lamp) s911
Left
Left front park/ turn lamp
Left license lamp
Left power/ heated/ signal mirror
Left stop/ park/ turn lamp
Left turn indicator
Main light switch
Multi-function switch
Nca
Normal
Off
Park
Park lamp relay (w/ auto lamps)
Power distribution box (left side of engine compt)
Right
Right front park/ turn lamp
Right license lamp
Right power/ heated/ signal mirror
Right stop/ park/ turn lamp
Right turn indicator
Rpo relay box (behind right side of dash)
S104
S202
S204
S219
S224 (main harn, near breakout to main light sw)
S228
S245 (main harn, near breakout to rpo relay box)
S414
S415
S417
S909
Trailer/ camper adapter circuit

Trailer/Camper Adapter Wiring Diagram for Ford Expedition 1998

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List of elements for Trailer/Camper Adapter Wiring Diagram for Ford Expedition 1998:

(engine cntrl sensor harn, left side of eng compt)
(left front radiator support) g108
(main harn, left rear of eng compt) s260
(main harn, near breakout to steering wheel rotation sensor) s261
(trailer backup lamps)
(trailer battery)
(trailer left turn lamps)
(trailer right turn lamps)
(trailer running lamps)
87a
Brake pedal position switch (under left side of dash)
Breakout to inst cluster)
C242
Engine fuse module
Exterior lights (back-up lamps circuit)
Exterior lights (exterior lights circuit)
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 30a
Fuse 40a
G203 (lower right kick panel)
G416 (left rear of frame)
Head
Hot at all times
Hot in run
Interior lights
Junction box fuse/relay panel (under left side of dash)
Left turn signal output
Main light switch
Multi- function switch
Off
Park
Power distribution box
Power distribution center (left side of engine compt)
Red
Right turn signal output
S105
S108
S110
S111
S115
S201
S221
S224 (main harn, in breakout to main light sw)
S228
Trailer electronic brake control
Trailer tow backup lamp relay
Trailer tow battery charge relay
Trailer tow left turn relay
Trailer tow right turn relay
Trailer tow running lamp relay
Trailer/ camper adapter

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 3) for Ford Expedition 1998

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List of elements for Ground Distribution Wiring Diagram (1 of 3) for Ford Expedition 1998:

(main harn, near breakout to evo module)
(main harn, near breakout to rpo relay box)
4 wheel air suspension module
4 wheel drive mode switch
A/c clutch diode
A/c compressor clutch solenoid
Air suspension compressor motor and vent solenoid assembly
Ashtray illumination
Battery
Blend door actuator
Blower motor resistor
Blower relay
Blower/ flasher relay block
Camshaft position sensor shield
Clock spring assembly
Crankshaft position sensor shield
Datalink connector
Digital transmission range sensor
Electronic variable orifice module
Engine compartment lamp
Flasher relay
Front air fill solenoid
Front gate solenoid
Function selector switch
G105 (rear of right fender apron)
G109 (right front radiator support)
G123 (rear of engine compartment)
G133 (on engine)
G203 (lower right kick panel)
G414 (near fuel tank)
Glove compartment lamp
Hybrid cooling fan
Instrument cluster
Knock position sensor shield
Left fog lamp
Left front park/turn lamp
Left rear vent window switch
Main light switch
Mass air flow (maf) sensor
Mini console
Moonroof assembly
Moonroof switch
Not used
Overhead trip computer module
Passive anti-theft system module
Power distribution relay box
Powertrain control module
Radio (premium)
Rear defogger switch
Rear wiper down relay
Rear wiper up relay
Right fog lamp
Right front park/turn lamp
Right headlamp
Right rear vent window switch
Rpo relay box
S100 (engine compt harn, in breakout to pcm)
S101 (engine compt harn, in breakout to pcm)
S104 (engine compt harn, near breakout to ground g109)
S177 (airspring harn, near battery)
S199 engine compt harn, right rear of engine compt)
S200 (main harn, behind right side of dash)
S202 (main harn, in breakout to blower/flasher relay block)
S204 (main harn, near breakout to instrument cluster)
S266 (main harn, near breakout to datalink)
S424 (seatbelt harn, near breakout rpo relay box)
S922 (interior lamp harn, near breakout to moonroof)
S923 (interior lamp harn)
Shift lock actuator
Speed control/ servo amplifier assembly
Starter motor)
Torque on demand relay
Trailer adapter (electronic brake control)
Transfer case shift relay
Vent window/ moonroof full relay
Washer fluid level switch
Windshield wiper motor

Ground Distribution Wiring Diagram (2 of 3) for Ford Expedition 1998

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List of elements for Ground Distribution Wiring Diagram (2 of 3) for Ford Expedition 1998:

(body harn, in breakout to park brake switch)
(body harn, in breakout to right rear grommet)
(engine compt harn, near breakout to compressor motor/ vent solenoid assembly)
4 wheel anti-lock brake system module
4wabs relay
87a
Air suspension compressor relay
All lock relay
All unlock relay
Auxiliary power socket
Brake fluid level indicator switch
Cigar lighter
Compressor motor/ vent solenoid
Console auxiliary power socket
Fuel pump assembly
G108 (left front radiator support)
G109 (right front radiator support)
G203 (lower right kick panel)
Junction box fuse/relay panel
Left front door ajar switch
Left front door courtesy lamp
Left front power door lock switch
Left front power window switch
Left headlamp
Left power/ heated/ signal mirror
Left rear air spring solenoid
Left rear door ajar switch
Left rear window switch
Left running board lamp
One touch down relay
Overhead trip computer module
Pcm power relay
Power distribution box
Power distribution relay box
Power mirror switch
Rear air fill solenoid
Rear integrated control panel (audio)
Rear integrated control panel (blower)
Rear washer pump relay
Right front door ajar switch
Right front door courtesy lamp
Right front power door lock switch
Right front power window switch
Right power/ heated/ signal mirror
Right rear air spring solenoid
Right rear door ajar switch
Right rear window switch
Right running board lamp
S105 (engine compt harn, in breakout to pdc)
S106 (engine compt harn, near breakout to ground g108)
S205 (main harn, near breakout to evo module)
S251 (body harn, near breakout to rap module)
S258 (body harn, behind right side of dash)
S322 (console harn, near breakout to console blower motor)
S400 (rear lamp harn, near breakout to fuel pump assembly)
S428 (rear lamp harn, near breakout to running board lamp 1)
S429 (rear lamp harn, near breakout to running board lamp 3)
S500 (body harn, near breakout to left power mirror switch)
S501 (body harn, near breakout to left power mirror switch)
S600 (body harn, near breakout to right door courtesy lamp)
Trailer tow backup lamp relay
Trailer tow battery charge relay
Trailer tow left turn relay
Trailer tow right turn relay
Trailer tow running lamp relay
Washer pump relay

Ground Distribution Wiring Diagram (3 of 3) for Ford Expedition 1998

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List of elements for Ground Distribution Wiring Diagram (3 of 3) for Ford Expedition 1998:

(seatbelt harn, near breakout to rpo relay box)
4 wheel suspension module
Airbag diagnostic monitor
Amplifier
Auxiliary a/c blend actuator (w/ aux a/c)
Auxiliary a/c control module (w/ aux a/c)
Auxiliary a/c mode actuator (w/ aux a/c)
Auxiliary a/c relay
C242
Cd changer
Compass sensor
Electronic variable orifice module
Engine coolant temperature sensor
Front blower motor switch
Front blower switch illumination
Front height sensor
Front map/dome lamp assembly
Fuel pump assembly
Full console only
G200 (lower left kick panel)
G202 (upper left kick panel)
G402 (left rear wheelwell)
G404 (left rear of vehicle)
G414 (near fuel tank)
Generic electronic module
Glass ajar switch
High mount stop lamp
Instrument cluster
Junction box fuse/relay panel
Left backup lamp
Left license lamp
Left rear vent window switch
Left side rail lamp
Left stop/ park/ turn lamp
Liftgate ajar switch
Overhead trip computer module
Power seat control switch
Powertrain control module
Radio
Rear blower switch illumination
Rear cargo lamp
Rear height sensor
Rear integrated control panel
Rear window defrost grid
Rear wiper motor
Remote anti-theft personality module
Right backup lamp
Right license lamp
Right rear vent window switch
Right side rail lamp
Rpo relay box
S107 (engine compt harn, near starter motor relay)
S207 (main harn, near at upper left cowl panel ground g202)
S208 (main harn, near at upper left cowl panel ground g202)
S250 (body harn, near rap module)
S410 (rear lamp harn, near front height sensor)
S417 (seatbelt harn, near breakout to right stop/park/turn lamp)
S425 (seatbelt harn, near overhead console)
S913 (interior lamp harn, near breakout to left side rail lamp)
S925 (interior lamp harn, near breakout to powertrain switch)
Seatbelt warning switch
Steering wheel rotation sensor
Subwoofer amplifier
Trailer/ camper adapter
Vehicle speed sensor
Vent window/ moonroof full relay
W/ auxiliary a/c
W/o auxiliary a/c

HEADLIGHTS

Autolamps/Fog Lamps Wiring Diagram, with DRL for Ford Expedition 1998

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List of elements for Autolamps/Fog Lamps Wiring Diagram, with DRL for Ford Expedition 1998:

(main harn, in main light switch breakout)
(main harn, near rpo relay box breakout)
Auto- lamp on
Auto- lamp on ind
Autolamp module (behind center of dash)
Battery
Brake ind out
C236
C237
C242
C243
C244
C245
C246
C259
Daytime running lamps (drl) module (on left front of engine compartment)
Fog lamp relay
Fog lamp sw
Fog on ind
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 30a
Fuse 5a
G108 (left front radiator support)
G109 (right front radiator support)
G203 (lower right kick panel)
Head
Headlamp relay
Headlamps
Headlmps
Hi-beam indicator
Hot at all times
Hot in run
Hot in start or run
Ignition
Ind feed
Instrument cluster
Instrument cluster system (brake ind)
Junction box fuse/relay panel
Left fog lamp
Left headlamp
Main light
Main light switch
Multi- function switch
Off
Park
Park brake input
Park brake switch (on right side of park brake lever)
Park lamp relay
Pass
Power distribution box
Relay output
Right fog lamp
Right headlamp
Rpo relay box (behind right side of dash)
S104
S106
S109
S112
S114
S122
S147 (eng control sensor harn, in left fog lamp breakout)
S204
S211
S212
S219
S224
S225
S245
Switch

Autolamps/Fog Lamps Wiring Diagram, without DRL for Ford Expedition 1998

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List of elements for Autolamps/Fog Lamps Wiring Diagram, without DRL for Ford Expedition 1998:

(main harn, in main light switch breakout)
(main harn, near rpo relay box breakout)
Auto- lamp on
Auto- lamp on ind
Autolamp module (behind center of dash)
Battery
C236
C237
C242
C243
C244
C245
C246
C259
Fog lamp relay
Fog lamp sw
Fog on ind
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 30a
Fuse 5a
G108 (left front radiator support)
G109 (right front radiator support)
G203 (lower right kick panel)
Head
Headlamp relay
Hi-beam indicator
Hot at all times
Hot in start or run
Ignition
Instrument cluster
Junction box fuse/relay panel
Left fog lamp
Left headlamp
Main light
Main light switch
Multi- function switch
Off
Output to ctrl sw
Output to rheostat
Park
Park lamp relay
Pass
Power distribution box
Relay output
Right fog lamp
Right headlamp
Rpo relay box (behind right side of dash)
S104
S106
S109
S114
S147 (eng control sensor harn, in left fog lamp breakout)
S204
S211
S212
S219
S224
S225
S244 (main harn, near upper kick panel)
S245
Switch

Headlamps/Fog Lamps Wiring Diagram, with DRL for Ford Expedition 1998

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List of elements for Headlamps/Fog Lamps Wiring Diagram, with DRL for Ford Expedition 1998:

Battery
Brake ind out
C236
C237
C242
C243
C244
C246
C259
Daytime running lamps (drl) module (on left front of engine compartment)
Fog lamp relay
Fog lamp sw
Fog on ind
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 30a
Fuse 5a
G108 (left front radiator support)
G109 (right front radiator support)
G203 (lower right kick panel)
Head
Headlamps
Headlmps
Hi-beam indicator
Hot at all times
Hot in run
Ignition
Ind feed
Instrument cluster
Instrument cluster system (brake ind)
Junction box fuse/relay panel
Left fog lamp
Left headlamp
Main light
Main light switch
Multi- function switch
Off
Panel)
Park
Park brake input
Park brake switch (on right side of park brake lever)
Pass
Power distribution box
Right fog lamp
Right headlamp
S104
S106
S109
S112
S114
S122
S147 (eng control sensor harn, in left fog lamp breakout)
S204
S212
Switch

Headlamps/Fog Lamps Wiring Diagram, without DRL for Ford Expedition 1998

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List of elements for Headlamps/Fog Lamps Wiring Diagram, without DRL for Ford Expedition 1998:

C236
C237
C242
C243
C244
C246
C259
Fog lamp relay
Fog lamp sw
Fog on ind
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 30a
Fuse 5a
G108 (left front radiator support)
G109 (right front radiator support)
G203 (lower right kick panel)
Head
Hi-beam indicator
Hot at all times
Instrument cluster
Junction box fuse/relay panel
Left fog lamp
Left headlamp
Main light
Main light switch
Multi- function switch
Off
Park
Pass
Power distribution box
Right fog lamp
Right headlamp
S104
S106
S109
S114
S147 (eng control sensor harn, in left fog lamp breakout)
S204
S212
S244 (main harn, near upper kick panel)
Switch

HORN

Horn Wiring Diagram for Ford Expedition 1998

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List of elements for Horn Wiring Diagram for Ford Expedition 1998:

(engine control sensor harness, near breakout to low pitch horn)
87a
Clock- spring assembly
Fuse 5 20a
High pitch horn (right front of engine compt)
Horn relay
Horn switches
Hot at all times
Low pitch horn (right front of engine compt)
Nca
Power distribution box (on left side of engine compartment)
Remote anti-theft personality (rap) module (behind left side of dash)
S145
Steering assembly
Steering column ground

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram for Ford Expedition 1998

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List of elements for Instrument Cluster Wiring Diagram for Ford Expedition 1998:

(behind center of dash) 4 wheel air suspension module
(conn a)
(conn b)
(conn c)
(left front radiator support)
(left side of engine compt)
(main harn, right side of dash)
(on right side of engine compt) powertrain control module
4 wheel anti-lock brake module (on left side of eng compt)
4.6l
4x4 high ind
4x4 low ind
5.4l
A11
A12
A4wd ind
Air suspension ind
Airbag diagnostic monitor (behind right side of dash)
Airbag ind
Anti- lock brakes system
Anti-lock ind
Anti-theft ind
B10
B11
B12
B14
B15
B16
Brake ind
C10
C11
C12
C174
C236
C237
C238
C239
C240
C241
C242
C243
Charge ind
Coolant temperature
Daytime running lamps module (on left front of engine compt)
Door ajar ind
Ect
Engine controls system
Engine coolant temperature sender (on top front of engine)
Engine oil pressure
Engine oil pressure switch (4.6l: near electronic variable orifice) (5.4l: on left front of engine, next to p/s pump)
Exterior lights system
Fuel
Fuel gauge
Fuel pump assembly (under vehicle, at fuel tank)
Fuel reset ind
Fuse 10a
Fuse 5a
G108 g200 (lower left kick panel)
G200 (lower left kick panel)
G203 (lower right kick panel)
Generic electronic module
Headlights system
Hot at all times
Hot in run or start
Illumination
Inertia fuel shutoff (under right side of dash)
Instrument cluster
Interior lights system
Junction box fuse/relay panel
Left turn ind
Low fuel ind
Low oil/ high coolant ind
Low washer fluid ind
Malfunction indicator
Mil
Nca
Overhead console
Park brake switch (on right side of park brake lever)
Passive anti-theft control module (behind center of dash)
Right turn ind
S107
S123 (engine compt harn, near starter mtr relay)
S124
S143 (near breakout to washer motor)
S151 (engine compt harn, near breakout to washer motor)
S201
S204
S207
S208
S225
S289
S298
S400
Seatbelt ind
Solid state
Speed control servo/ amplifier (left rear of engine compt)
Speedo
Speedometer/ odometer
Starting/ charging system
Tach
Tachometer
Vehicle speed sensor (on left rear of trans- mission)
Voltmeter
W/ drl
W/o drl

Overhead Console Wiring Diagram for Ford Expedition 1998

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List of elements for Overhead Console Wiring Diagram for Ford Expedition 1998:

4 wheel air suspension module (behind center of dash)
C242
Compass sensor
Fuel pump assembly (under vehicle, at fuel tank)
Fuse 5a
G108 (left front
G200 (lower left kick panel)
G402 (near fuel tank)
Hot at all times
Hot in run
Interior lights
Junction box fuse/relay panel
Left map/ dome lamp
Overhead trip computer module
Pnk
Powertrain control module (on right side of engine compt)
Radiator support)
Right map/ dome lamp
S289
S298 (main harn, right side of dash)
S400
S425
S426
S923
Transmission controls

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for Ford Expedition 1998

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List of elements for Courtesy Lamps Wiring Diagram for Ford Expedition 1998:

g105 (rear of right fender
off
(body main harn, behind right side of dash) s239
(int lamp feed harn, near rear blower switch breakout)
(int lp feed harn, near left side rail lamp breakout)
(int lp feed harn, near right vent window sw breakout)
(left front radiator (exterior lights system) (trailer/ camper adapter)
(rear lamp ext harn, in right side running board) s434
(seat belt ret harn, near right kick panel)
(seat belt ret harn, near torque on demand breakout)
Apron)
Battery saver input
Battery saver relay
C242
C243
C245
C246
C267
C928
Dome lamp
Dome lamp switch
Door
Engine compartment lamp
Front dome/ map lamp assembly
Fuse 10a
Fuse 15a
Fuse 40a
G108
G108 (left front radiator support)
G203 (lower right kick panel)
G402 (left rear wheelwell)
G414 (near fuel tank)
Generic electronic module (gem)
Glove compartment lamp
Hot at all times
Hot in run
Interior lamp relay
Interior lamp relay input
Junction box fuse/ relay panel
Left door courtesy lamp
Left map/ dome lamp
Left running board lamp
Left side rail lamp
Left vanity lamp
Main light switch
Map lamps
Mini fuse block
Nca
Off
Overhead trip computer (w/ mini console)
Pnk
Power distribution box
Rear cargo lamp
Rear dome/ map lamp assembly
Red
Right side rail lamp
Right door courtesy lamp
Right map/ dome lamp
Right running board lamp
Right vanity lamp
Rpo relay block 1
Running board lamp relay
S102
S105
S110
S164 (eng cntrl sens harn, left rear of eng compt)
S200
S203
S204
S228
S240 (main harn, near ashtray illum breakout)
S400
S408 (rear lamp harn, in left side running board)
S418 (seat belt ret harn, near dome lamp breakout)
S420
S428
S429
S500
S501
S600
S900
S912
S913
S917
Support)
Trailer tow battery charge relay (in power distri- bution box)
W/ aux a/c
W/ aux a/c only
W/ mini console only
W/o aux a/c
W/o aux a/c or w/ mini console
Wiper/ washer system

Instrument Illumination Wiring Diagram for Ford Expedition 1998

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List of elements for Instrument Illumination Wiring Diagram for Ford Expedition 1998:

(int lp feed harn) s924
(int lp feed harn, near rear blower sw breakout) s915
(main harn, behind left side of dash) s242
4wheel drive mode switch
Ashtray illumination
C219
C230
C236
C237
C242
C245
C246
C262
C298
C314
C508
C510
C511
C608
C609
C709
C809
C915
C929
C930
Clock- spring assembly
Dimmer module
Front blower switch illumination
Function selector switch
Fuse 15a
Fuse 5a
G203 (lower right kick panel)
G414 (near fuel tank)
Head
Hot at all times
Hot in acc or run
Instrument cluster (6 bulbs)
Junction box fuse/relay panel
Left front power door lock switch
Left front power window switch
Left rear vent window switch
Left rear window switch
Main light switch
Moonroof switch
Nca
Off
Overhead console
Park
Power distribution box
Power mirror switch
Radio (premium sound)
Rear blower switch illumination
Rear integrated control panel
Rear window defogger switch
Right front power door lock switch
Right front power window switch
Right rear vent window switch
Right rear window switch
S201
S202
S203
S204
S209
S211
S223
S224 (main harn, near main light switch breakout) c243
S253 (body main harn, behind right side of dash)
S256 body main harn, near lock relay box breakout)
S286 (main harn, near breakout to relay block)
S501
S600
S701
S801
S913
S923
S925
Steering assembly
Trailer electronic brake control
W/ full overhead console
W/ mini overhead console

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 4) for Ford Expedition 1998

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List of elements for Power Distribution Wiring Diagram (1 of 4) for Ford Expedition 1998:

(body harn, near breakout to power distribution relay box) s216
(console harn, near breakout to console blower motor) s305
(main harn, in breakout to engine fuse module) s110
(main harn, near breakout to main light switch) s211
(main harn, near breakout to main light switch) s212
(main harn, near console) s281
Air bag diagnostic monitor
Air suspension compressor relay
Air suspension service switch
All lock relay
All unlock relay
Amplifier
Anti-lock brake system module (4wabs)
Auxiliary a/c relay
Auxiliary power socket
Battery
C142
C147
C209
Cd changer
Console auxiliary power socket
Daytime running lamps module
Driver's unlock relay
Engine fuse module (near pdc)
Fog lamp relay
From a fuse 3 (diagram 1 of 4)
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 25a
Fuse 30a
Fuse 40a
Fuse 50a
Fuse 60a
Generator
Headlamp relay
Horn relay
Inline mini fuse 20a (near generator)
Lock relays
Main light switch
Mega fuse 175a (alternator) (right rear of engine compartment)
Mega fuse 175a (pdb) (right rear of engine compartment)
Multi- function switch
Park lamp relay
Power distribution box
Power distribution box (left side of engine compartment)
Power distribution relay box
Radio
Rear integrated control panel
Rear wiper down relay
Rear wiper up relay
Red
Rpo relay box
S108 (engine compt harn, in breakout to pdb)
S288 (main harn, near breakout to radio amplifier)
Starter motor
Starter relay
Subwoofer amplifier
To fuse 17 (diagram 2 of 4)
To fuse 6 (diagram 1 of 4)
Trailer tow backup lamp relay
Trailer tow battery charge relay
Trailer tow left turn relay
Trailer tow right turn relay
Trailer tow running lamp relay

Power Distribution Wiring Diagram (2 of 4) for Ford Expedition 1998

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List of elements for Power Distribution Wiring Diagram (2 of 4) for Ford Expedition 1998:

(diagram 3 of 4)
(engine compt harn, left rear of engine compt) s112
(engine compt harn, left rear of engine compt) s113
(main harn, in breakout to fuse relay panel) s265
(main harn, in breakout to transfer case) s213
(main harn, near breakout to instrument cluster) s222
(main harn, near steering wheel rotation sensor) s226
4 wheel air suspension module
Acc
Acc delay relay
Blend door actuator
Blower relay
Blower/ flasher relay box
C142
C242
C243
C256
C267
C294
C295
C928
Circuit breaker 30a
Compass sensor
Daytime running lamps module
Digital trans- mission range sensor
Digital transmission range sensor
Electronic variable orifice module
Engine fuse module (near pdc)
From b fuse 16 (diagram 1 of 4)
Fuel pump relay
Function selector switch
Fuse 15a
Fuse 20a
Fuse 30a
Fuse 40a
Fuse 50a
Fuse 5a
Generic electronic module
Ignition switch
Junction box fuse/ relay panel
Junction box fuse/ relay panel (under left side of dash)
Lock
Main light switch
Off
Overhead trip computer module
Pcm power relay
Power distribution box
Power distribution box (left side of engine compartment)
Power distribution relay box
Power seat control switch
Powertrain control module
Radio
Rear defogger relay
Rear washer pump relay
Red
Remote anti-theft personality module
Rpo relay box
Run
S214 (main harn, near steering wheel rotation sensor)
S215 (main harn, in breakout to ignition switch)
S223 (main harn, near breakout to instrument cluster)
S426 (in seat belt harn)
Shift lock actuator
Speed control servo/ amplifier assembly
Start
Steering wheel rotation sensor
To fuse 1 (diagram 3 of 4)
To fuse 19 (diagram 3 of 4)
To fuse 20
To fuse 22 (diagram 4 of 4)
Torque on demand relay
Trailer adapter (electronic brake control)
Transfer case shift relays
Vent window/ moonroof relay
Washer pump relay
Windshield wiper motor
Wiper hi/lo relay
Wiper run/park relay

Power Distribution Wiring Diagram (3 of 4) for Ford Expedition 1998

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List of elements for Power Distribution Wiring Diagram (3 of 4) for Ford Expedition 1998:

(body harn, near breakout to park brake switch) s220
(engine compt harn, near breakout to ground g108) s114
(engine harn, in breakout to noise capacitor 1) s118
(main harn, near breakout to evo module) s219
(main harn, near breakout to instrument cluster) s225
(main harn, near breakout to instrument cluster) s289
4 wheel air suspension module
4.6l engine
5.4l engine
Airbag diagnostic monitor
Autolamp module
Battery saver relay
Blower/ flasher relay box
Brake pedal position switch
Brake pressure switch
C142
C216
C242
C243
C257
C267
C268
C295
Cigar lighter
Data link connector
Daytime running lamps module
Flasher relay
From fuse 21 (diagram 2 of 4)
From fuse 22 (diagram 2 of 4) c
From ignition switch (diagram 2 of 4)
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 25a
Fuse 30a
Fuse 5a
G203 (right kick panel)
Generic electronic module
Headlamp relay
Ignition coil no 1
Ignition coil no 2
Ignition coil no 3
Ignition coil no 4
Ignition coil no 5
Ignition coil no 6
Ignition coil no 7
Ignition coil no 8
Ignition coils 1 & 2
Ignition coils 3 & 4
Instrument cluster
Interior lamp relay
Junction box fuse/ relay panel (under left side of dash)
Left headlamp
Multi- function switch
Overhead trip computer module
Park lamp relay
Passive anti-theft system control module
Pcm power diode
Pcm power relay
Power distribution box
Power mirror switch
Radio noise capacitor no 1
Radio noise capacitor no 2
Remote anti- theft personality module
Right headlamp
Rpo relay box
S116 (engine harn, left rear of engine compt)
S117 (engine compt harn, right rear of engine compt)
S161 (engine harn, in breakout to fuel injector 3)
S162 (engine harn, in breakout to fuel injector 7)
S205
S277 (main harn, near breakout to rpo relay box)
Transmission control switch
W/ drl
W/o drl

Power Distribution Wiring Diagram (4 of 4) for Ford Expedition 1998

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List of elements for Power Distribution Wiring Diagram (4 of 4) for Ford Expedition 1998:

(engine compt harn, in breakout to 4wabs module) s121
(engine compt harn, left rear of engine compt) s120
(engine compt harn, near breakout to ambient temp sensor) s122
(main harn, front center of console) s279
(main harn, in breakout to fuse/ relay panel) s228
4 wheel anti-lock brake system module
4wabs relay
4x2 center axle disconnect solenoid
4x4 center axle disconnect solenoid
Airbag diagnostic monitor
Auxiliary a/c blend module
Auxiliary a/c control module
Auxiliary a/c mode actuator
Auxiliary a/c relay
Blower relay
Blower/ flasher relay box
C142
C146
C242
C243
C243 tan/red
C436
Console blower motor
Daytime running lamps module
Exterior lights
Flasher relay
Fog lamp relay
From ignition switch (diagram 2 of 4)
Function selector switch
Fuse 10a
Fuse 5a
Junction box fuse/ relay panel (under left side of dash)
Left headlamp
Main light switch
Multi- function switch
Nca
Not used
Power distribution box
Rear integrated control panel
Right headlamp
Rpo relay box
Tan/red
Trailer tow battery charge relay

POWER DOOR LOCKS

Power Door Lock Wiring Diagram for Ford Expedition 1998

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List of elements for Power Door Lock Wiring Diagram for Ford Expedition 1998:

(body harn, near breakout to in-line conn, near right side of dash) s254
(body harn, near breakout to remote anti-theft person- ality module) s234
(body harn, near breakout to right door courtesy lamp) s605
87a
All lock relay
All unlock relay
C256
C257
Driver's unlock relay
Fuse 30a
G203 (lower right kick panel)
Hot at all times
Interior lights system
Left front door lock motor
Left front power door lock switch
Left rear door lock motor
Lifgate door lock motor
Lock
Lock relay block (behind right side of dash)
Power distribution box
Remote anti-theft personality module (behind left side of dash)
Right front door lock motor
Right front power door lock switch
Right rear door lock motor
S216
S235 (body harn, near breakout to remote anti-theft personality module)
S255 (body harn, near break- out to lock relay block)
S258
S262
S500
S501
S600
S604 (body harn, near breakout to right door courtesy lamp)
Unlock

POWER MIRRORS

Power Mirror Wiring Diagram for Ford Expedition 1998

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List of elements for Power Mirror Wiring Diagram for Ford Expedition 1998:

(body main harn, near breakout to left front grommet)
Defogger system
Direct- ional control switch
Exterior lights system
Fuse 4 5a
G203 (lower right kick panel)
Hot at all times
Interior lights system
Junction box fuse/relay panel (under left side of dash)
L/r motor
Left p0wer/ heated mirror
Left/ right switch
Nca
Power mirror switch
Red
Right p0wer/ heated mirror
S220
S501
S503
Up/dn motor

POWER SEATS

Power Seat Wiring Diagram for Ford Expedition 1998

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List of elements for Power Seat Wiring Diagram for Ford Expedition 1998:

Entire seat
Forward/reverse motor
Front height motor
Front of seat
Fuse 18 30a
Fwd
G402 (left rear wheelwell)
Hot at all times
Nca
Power distribution box (on left side of eng compt)
Power seat control switch
Rear height motor
Rear of seat
Rwd
S414

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagrams for Ford Expedition 1998

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List of elements for Power Top/Sunroof Wiring Diagrams for Ford Expedition 1998:

(0.015 +/- 0.001 ohm) shunt
(interior lamp harness)
(main harness, near breakout to left kick panel ground)
(near fuel tank)
87a
Accessory delay relay
B pnk
Batt saver
Battery saver relay
C242
C243
C918
C919
Circuit breaker 30a
Close
Close/up
Flush
Fuse 15a
Fuse 30a
Fuse 50a
G414
G908 (near moonroof motor assembly)
Generic elec- tronic module
Ground
Hot at all times
Ill
Interior lights system
Junction box fuse/ relay panel (under left side of dash)
Left rear vent window switch
Left vent window motor
Ls common
Moonroof assembly (center of headliner)
Moonroof motor assembly (center of headliner)
Moonroof switch
Motor out 1
Motor out 2
Nca
One tch dn hi
One tch dn lo
One touch down relay
Open
Open/dn
Pnk
Power
Power distribution box (on left side of engine compartment)
Power windows system
Range
Red
Right rear vent window switch
Right vent window motor
Rpo relay block (behind right side of dash, above passsenger air bag)
S299
S424
S901 (interior lamp harn, near breakout to right rear vent window switch)
S914 (interior lamp harn, near breakout to moonroof)
S922
S923
S924
Soft stop
Sw 1
Sw 2
Sw 3
Sw common
Switch
Switch ill
Tan/ red
Tan/red
Vent window/ moonroof relay (behind right side of dash, on rpo relay block)

POWER WINDOWS

Power Window Wiring Diagram for Ford Expedition 1998

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List of elements for Power Window Wiring Diagram for Ford Expedition 1998:

(body harn, near breakout to 16 pin conn, behind right side of dash)
(except 1998 ford) (1998 ford)
87a
Acc delay relay
Batt saver
Battery saver relay
C242
C243
C267
C509
C510
Circuit breaker 30a
Down sw input
Fuse 15a
Fuse 50a
G203 (lower right kick panel)
Generic elec- tronic module
Ground
Hot at all times
Interior lights system
Junction box fuse/ relay panel (under left side of dash)
Left front power window motor
Left front power window switch
Left rear power window motor
Left rear power window switch
Left rear switch
Left switch
Lock out
One tch dn hi
One tch dn lo
One touch down relay
Otd sw input
Otd switch
Power distribution box (left side of engine compt)
Power tops system
Right front power window motor
Right front power window switch
Right rear power window motor
Right rear power window switch
Right rear switch
Right switch
S205
S252 (body harn, near breakout to park brake switch)
S257
S299 (except 1997) (main harn, near breakout to g200, left kick panel)
S500
S502 (body harn, near breakout to left front grommet, ford) (body harn, near breakout to memory set sw, lincoln)
S600
S701 s209
S801
Shunt (0.015 +/- 0.001 ohm)
Up sw input

RADIO

Radio Wiring Diagrams for Ford Expedition 1998

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List of elements for Radio Wiring Diagrams for Ford Expedition 1998:

(dash harn, under center console)
(main harn, behind center of dash)
(upper left kick panel) g202
Amplifier (behind center of dash)
Audio (+)
Audio (-)
C242
C261
C262
C263
C264
C314
C442
C443
Cd changer
Cd left (+)
Cd left (-)
Cd right (+)
Cd right (-)
Engine fuse module (left side of engine compt)
Fuse 10a
Fuse 20a
Fuse 5a
G202 (upper left kick panel)
G203 (lower right kick panel)
Ground
Hot at all times
Hot in run or acc
Ignition
Illulmination
Illumination
Interior lights system
Junction box fuse/relay panel (under left side of dash)
L channel +
L channel -
L front (+)
L front (-)
L rear (+)
L rear (-)
Left front door speaker
Left rear door speaker
Mute
Nca
Power
Power (b+)
Protocal a
Protocal b
Protocol a
Protocol b
R channel +
R channel -
R front (+)
R front (-)
R rear (+)
R rear (-)
Radio
Rear integrated control panel (audio)
Right front door speaker
Right rear door speaker
S203
S223
S268
S280
S281
S282
S283
S284
S285
S303
S304
S305
S306
S322
S323
Shield
Subwoofer
Subwoofer amplifier (behind right side of dash)
System on
Tan

SHIFT INTERLOCKS

Shift Interlock Wiring Diagram for Ford Expedition 1998

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List of elements for Shift Interlock Wiring Diagram for Ford Expedition 1998:

Brake pedal position (bpp) switch (under left side of dash)
Exterior lights system
Fuse 13 15a
Fuse 6 5a
G203 (lower right kick panel)
Hot at all times
Hot in run
Junction box fuse/relay panel (under left side of dash)
S204
S265
Shift lock actuator (in steering column)
Solid state

STARTING/CHARGING

Charging Wiring Diagram for Ford Expedition 1998

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List of elements for Charging Wiring Diagram for Ford Expedition 1998:

175a
20a
Battery
C166
C176
C177
C178
C238
C243
Charge indicator
Fuse 10a
G123 (rear of engine compt)
G133 (on engine)
Generator/ voltage regulator
Hot in start or run
Inline mini fuse (near gener- ator)
Instru- ment cluster
Junction box fuse/ relay panel
Mega fuse (alter- nator) (right rear of engine compt)
Ohms
Power distribution system
Red
Starter motor
Starter motor relay (right rear of engine compt)

Starting Wiring Diagram for Ford Expedition 1998

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List of elements for Starting Wiring Diagram for Ford Expedition 1998:

175a
Acc
Battery
C175
C182
C243
Charging circuit
Digital trans- mission range (dtr) sensor (left side of trans)
Fuse 15a
Fuse 50a
G123 (rear of engine compt)
G133 (on engine)
Ignition switch
Junction box fuse/relay panel
Lock b4
Mega fuse (pdb) (right rear of engine compt)
Off
Power distri- bution box
Power distribution system
Red
Run
S214
Sta
Start
Starter motor (lower right side of engine)
Starter motor relay (right rear of engine compt)
Tan/red

SUPPLEMENTAL RESTRAINTS

Supplemental Restraint Wiring Diagram for Ford Expedition 1998

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List of elements for Supplemental Restraint Wiring Diagram for Ford Expedition 1998:

(expedition-main harn, behind center of dash) (navigator-main harn, behind left of dash)
(main harness, at upper left cowl panel near breakout to g202)
(not used)
(under center of dash) data link connector (dlc)
* pin shorting bar is engaged when module connector is disconnected
Air bag diagnostic monitor (behind right side of dash)
Air bag ind
Air bag indicator
C208
C209
C228
C238
C242
C243
Clock- spring assembly
Data link con
Driver's air bag
Drvr air bag
Fuse 19 10a
Fuse 2 10a
Fuse 22 10a
G200 (lower left kick panel)
Ground
Hot at all times
Hot in run
Hot in run or start
Instrument cluster
Junction box fuse/relay panel (under left side of dash)
L crash sens
Left primary crash sensor (in left front of engine compartment)
Nca
Pass air bag
Passenger's air bag
Power (bat)
Power (run)
Power distribution box (on left side of engine compt)
R crash sens
Right primary crash sensor (in right front of engine compartment)
S208
S229
Shorting bar

TRANSMISSION

4.6L

4.6L, Transmission Wiring Diagram, 4R70W for Ford Expedition 1998

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List of elements for 4.6L, Transmission Wiring Diagram, 4R70W for Ford Expedition 1998:

(backup lamp sw to rear lamp harn, right rear of engine compt)
(bare)
(engine ctrl harn, near breakout to pcm)
(engine ctrl harn, near breakout to pdb)
(engine ctrl harn, near breakout to starter motor relay)
(engine ctrl harn, near breakout to vapor mgt valve) s127
(engine ctrl harn, near breakout to vapor mgt valve) s143
(engine ctrl harn, right rear of engine compt)
(fuel charge harn, near breakout to fuel inj 4)
(left side of engine compt) power distribution box
(main harn, right side of dash)
(under center of dash)
4r70w transmission (mounted under center of vehicle)
Anti- theft system
Autolamp module, instrument cluster
Boo
Brake pedal position switch (under left side of dash)
Brake pressure switch
C174
C236
Case gnd
Data
Data link connector (dlc) (partial)
Digital transmission range sensor (left side of transmission)
Dlc (+)
Dlc (-)
Ect
Electronic pressure control solenoid
Engine controls system
Engine coolant temperature (ect) sensor (top front of engine)
Engine fuse module (in engine compt, near pdb)
Epc
Fuse 13 15a
Fuse 24 30a
Fuse 29 5a
Fuse 30 30a
Fuse 5a
G108 (left front radiator support)
G123 (rear of engine compartment)
G200 (lower left kick panel)
Hot at all times
Hot in run or start
Iat
Ignition coils, radio noise capacitor
Instrument cluster
Intake air temperature sensor (on intake manifold)
Junction box fuse/ relay panel (under left side of dash)
Kapwr
Malfunction indicator lamp (mil) (check engine)
Mil
O/d off ind
Oss
Output shaft speed sensor (left side of transmission)
Pcm power diode
Pcm power relay
Power distribution box (left side of engine compt)
Powertrain control module (pcm) (right side of engine compt)
Pwr gnd
R p
Red
S100
S101
S106
S107
S116
S128
S135
S137
S138
S140
S141
S144
S225
S275
S276
Shift solenoids (ss)
Sig rtn
Ss1
Ss2
Tcc
Tcil
Tcs
Tft
Throttle position (tp) sensor (on throttle body)
Torque converter clutch (tcc) solenoid
Tr1
Tr2
Tr3
Tr4
Transmission control switch (tcs) (end of transmission selector lever)
Transmission fluid temperature sensor
Vehicle speed sensor (vss) (left rear of transmission)
Vpwr
Vref
Vss

Transfer Case Wiring Diagram for Ford Expedition 1998

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List of elements for Transfer Case Wiring Diagram for Ford Expedition 1998:

"4x4" indicator
"low range" indicator
(2wd) 3.9k ohms
(4h) ohms
(4l) ohms
(4wd) 1.5k ohms
(behind center of dash)
(engine ctrl harn, near breakout to vapor mgt valve) s143
(left front radiator support) g108
(lower right kick panel) g203
(main harn, near breakout to airbag diagn monitor) s278
(main harn, near breakout to transfer case)
(right side of engine compt) 4x2 center axle disconnect solenoid
(right side of engine compt) 4x4 center axle disconnect solenoid
(right side of engine compt) powertrain control module
(seatbelt harn, near breakout to transfer case)
(under left side of dash) junction box fuse/ relay panel
4 wheel air suspension (4was) module
4 wheel drive mode switch
4wd low out
4wd output
4x2 sol
4x4 high ind
4x4 low ind
4x4 mode sw
4x4 sol
A4wd ind
A4wd indicator
Abs input
Anti-lock brake system
Apron) g105
Autolamp module, tcs switch
Bpp sw input
Brake pedal position switch (under left side of dash)
Brake pressure switch
C174
C236
C238
C239
C240
C241
C242
C243
C267
C296
Digital transmission range (dtr) sensor (left side of transmission)
Flasher rly, a/c system
Frnt spd sens
Front speed sensor
Fuse 13 15a
Fuse 17 30a
Fuse 23 10a
Fuse 29 5a
G108 (left front radiator support)
G200 (lower left kick panel)
Generic electronic module (gem) (behind left side of dash)
H2l
H2l rly ctrl
Hall effect
Hot at all times
Hot in run
Hot in run or start
Illumination
Instrument cluster
Interior lights (instrument illumination)
Junction box fuse/ relay panel (under left side of dash)
L2h
L2h rly ctrl
Magnetic clutch
Neutral sw in
Power distribution box (left side of engine compt)
Rear spd sens
Rear speed sensor
Red
S102
S120
S201
S202
S213
S225
S228
S231 (main harn, near breakout to instr cluster)
S233
S233 (main harn, near breakout to gem)
S301
S302
Shift motor
Sig return
Sw a input
Sw b input
Sw c input
Sw d input
Tod relay
Torque on demand (tod) relay (behind center of dash)
Trailer tow battery relay
Transfer case assembly
Transfer case shift relays (behind center of dash)
Vehicle speed sensor (vss) (left rear of transmission)
Vss (+)
Vss (-)
Wiper/washer (multi-function switch)

5.4L

5.4L, Transmission Wiring Diagram, E4OD for Ford Expedition 1998

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List of elements for 5.4L, Transmission Wiring Diagram, E4OD for Ford Expedition 1998:

(1997)
(1998)
(backup lamp sw to rear lamp harn, right rear of eng compt)
(bare)
(eng ctrl harn, right rear of engine compt)
(engine ctrl harn, near breakout to starter motor relay)
(engine ctrl harn, near breakout to vapor mgt valve) s127
(engine ctrl sensor harn, near breakout to c165, windshield wiper motor) s143
(fuel charge harn, near breakout to fuel inj 4)
(left side of engine compt) power distribution box
(main harn, right side of dash)
Anti- theft system
Autolamp module, instrument cluster
Boo
Brake pedal position switch (under left side of dash)
Brake pressure switch
Breakout to pdb)
C174
C236
C237
Case gnd
Ccs
Coast clutch solenoid
Data
Data link connector (dlc) (partial) (under center of dash)
Digital transmission range sensor (left side of transmission)
Dlc (+)
Dlc (-)
E4od transmission
Ect
Electronic pressure control (epc) solenoid
Eng coolant temp gauge
Engine controls system
Engine coolant temperature (ect) sensor (top front of engine)
Engine fuse module (expedition) mini fuse block (navigator) (in engine compt, near pdb)
Epc
Fuse 13 15a
Fuse 24 30a
Fuse 29 5a
Fuse 30 30a
Fuse 5a
G108 (left front radiator support)
G123 (rear of engine compartment)
G200 (lower left kick panel)
Hot at all times
Hot in run or start
Iat
Ignition coils, radio noise capacitor
Instrument cluster
Intake air temperature sensor (on intake manifold)
Junction box fuse/ relay panel (under left side of dash)
Kapwr
Malfunction indicator lamp (mil) (check engine)
Mil
O/d off ind
Pcm power diode
Pcm power relay
Power distribution box (left side of engine compt)
Powertrain control module (pcm) (right side of engine compt)
Pwr gnd
R p
Red
S100
S101
S106
S107
S116
S123
S128 (engine ctrl harn, near breakout to pcm)
S135
S137
S138
S140
S141
S207
S225
S275
S276
Shift solenoid
Sig rtn
Ss1
Ss2
Tcc
Tcil
Tcs
Tft
Throttle position (tp) sensor (on throttle body)
Torque converter clutch (tcc) solenoid
Tr1
Tr2
Tr3
Tr4
Transmission control switch (tcs) (end of transmission selector lever)
Transmission fluid temperature sensor
Vehicle speed sensor (vss) (left rear of transmission)
Vpwr
Vref
Vss

Transfer Case Wiring Diagram for Ford Expedition 1998

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List of elements for Transfer Case Wiring Diagram for Ford Expedition 1998:

"4x4" indicator
"low range" indicator
(2wd) 3.9k ohms
(4h) ohms
(4l) ohms
(4wd) 1.5k ohms
(behind center of dash)
(engine ctrl harn, near breakout to vapor mgt valve) s143
(left front radiator support) g108
(lower right kick panel) g203
(main harn, near breakout to airbag diagn monitor) s278
(main harn, near breakout to transfer case)
(right side of engine compt) 4x2 center axle disconnect solenoid
(right side of engine compt) 4x4 center axle disconnect solenoid
(right side of engine compt) powertrain control module
(seatbelt harn, near breakout to transfer case)
(under left side of dash) junction box fuse/ relay panel
4 wheel air suspension (4was) module
4 wheel drive mode switch
4wd low out
4wd output
4x2 sol
4x4 high ind
4x4 low ind
4x4 mode sw
4x4 sol
A4wd ind
A4wd indicator
Abs input
Anti-lock brake system
Apron) g105
Autolamp module, tcs switch
Bpp sw input
Brake pedal position switch (under left side of dash)
Brake pressure switch
C174
C236
C238
C239
C240
C241
C242
C243
C267
C296
Digital transmission range (dtr) sensor (left side of transmission)
Flasher rly, a/c system
Frnt spd sens
Front speed sensor
Fuse 13 15a
Fuse 17 30a
Fuse 23 10a
Fuse 29 5a
G108 (left front radiator support)
G200 (lower left kick panel)
Generic electronic module (gem) (behind left side of dash)
H2l
H2l rly ctrl
Hall effect
Hot at all times
Hot in run
Hot in run or start
Illumination
Instrument cluster
Interior lights (instrument illumination)
Junction box fuse/ relay panel (under left side of dash)
L2h
L2h rly ctrl
Magnetic clutch
Neutral sw in
Power distribution box (left side of engine compt)
Rear spd sens
Rear speed sensor
Red
S102
S120
S201
S202
S213
S225
S228
S231 (main harn, near breakout to instr cluster)
S233
S233 (main harn, near breakout to gem)
S301
S302
Shift motor
Sig return
Sw a input
Sw b input
Sw c input
Sw d input
Tod relay
Torque on demand (tod) relay (behind center of dash)
Trailer tow battery relay
Transfer case assembly
Transfer case shift relays (behind center of dash)
Vehicle speed sensor (vss) (left rear of transmission)
Vss (+)
Vss (-)
Wiper/washer (multi-function switch)

WARNING SYSTEMS

Warning System Wiring Diagrams for Ford Expedition 1998

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List of elements for Warning System Wiring Diagrams for Ford Expedition 1998:

(rear window reg harn, near breakout to glass ajar sw) s401
Bat
C2031 c245
C238
C239
C242
C243
C245 c2031
C267
Expedition navigator
Fuse 5a
G200
G200 (lower left kick panel)
G203 (lower right kick panel)
G402 (left rear wheelwell)
Generic electronic module (gem)/ (under left side of dash)
Glass ajar switch
Ground
Head
Headlamp switch
Hot at all times
Hot in acc or run
Hot in run
Hot in start
Ign
Ignition key warning switch (inside steering assembly)
Instrument cluster
Junction box fuse/relay panel (under left side of dash)
Key in ignition
Left front door ajar switch
Left rear door ajar switch
Lf door ajar
Liftgate ajar
Liftgate ajar switch
Lr door ajar
Navigator expedition
Nca
Off
Park
Park/head input
Rf door ajar
Right front door ajar switch
Right rear door ajar switch
Rr door ajar
S207
S208
S224
S251
S258
S402
S414
S500
S501
S600
S701
S801
Seat belt buckle
Seat belt ind
Seat belt warning switch (in seat belt buckle)
Steering column ground

WIPER/WASHER

Front Wiper/Washer Wiring Diagram for Ford Expedition 1998

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List of elements for Front Wiper/Washer Wiring Diagram for Ford Expedition 1998:

(1997 expedition)
(1998 expedition)
(1998 navigator)
103k ohms
3.3k ohms
4.08k ohms
7.25k
C239
C240
C243
C259
Front washer pump ctrl
Front washer pump relay
Fuse 30a
G105 (rear of right fender apron)
G108 (left front radiator support)
G109 (right front radiator support)
Gem; navigator)
Generic electronic module (behind left side of dash)
Hot in acc or run
Int max
Int min
Interval delay/wash
Junction box fuse/relay panel (under left side of dash)
Multi- function switch
Off
Off 36.27k ohms
Ohms
Park
Park sense
Power distri- bution box (left side of engine compt)
Power distri- bution relay box (left side of engine compt)
Rear washer pump ctrl
Rear washer pump relay
Red
Run
Run/park relay ctrl
S102
S104
S105
S113
S146 (engine control sensor harn, left rear of engine compt; expedition) (engine control sensor harn, in breakout to pwr distr box; navigator)
S233 (1998 expedition) (near gem)
Signal return
Tan/ red
Transmissions system
Washer fluid level
Washer fluid level switch (in fluid reservoir)
Washer pump assembly
Washer switch
Wind- shield wiper motor
Wiper hi/lo relay
Wiper mode select
Wiper run/park relay
Wiper speed ctrl
Wiper switch

Rear Wiper/Washer Wiring Diagram for Ford Expedition 1998

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List of elements for Rear Wiper/Washer Wiring Diagram for Ford Expedition 1998:

(1997)
(1998)
(left rear wheelwell) g402
1000 ohms
2900 ohms
330 ohms
Battery saver relay
C239
C239 c239 c239
C240
C243
C258
C259
C267
Front washer front washer front washer pump ctrl pump ctrl pump ctrl
Front washer pump relay
Fuse 10a
Fuse 15a
Fuse 30a
G105 (rear of right fender apron)
G108 (left front radiator support)
Generic electronic module
Generic electronic module (behind left side of dash)
Hot at all times
Hot in acc or run
Int1
Int2
Interior lamps system
Interval delay/wash
Junction box fuse/ relay panel (under left side of dash)
Multi- function switch
Nca
Off
Power distri- bution box (left side of engine compt)
Power distri- bution relay box (left side of engine compt)
Power distribution box (left side of engine compt)
Rear washer pump relay
Rear washer rear washer rear washer pump ctrl pump ctrl pump ctrl
Rear wiper down relay
Rear wiper hi/lo park sense
Rear wiper motor
Rear wiper switch
Rear wiper up relay
S102
S105
S113
S164 (engine sensor harn, left rear of engine compt)
S233 (1998 expedition) (near gem)
S402 (expedition) s404 (navigator)
Signal return
Tan
Tan/ red
Tan/ tan/ tan/ red red red
Transmissions system
Wash
Washer pump assembly
Washer switch