All Wiring Diagrams for Mercury Mountaineer 1998

AIR CONDITIONING

A/C Wiring Diagram, Auto A/C (1 of 2) for Mercury Mountaineer 1998

List of elements for A/C Wiring Diagram, Auto A/C (1 of 2) for Mercury Mountaineer 1998:

(near breakout for instrument cluster) s209
(near breakout to i/p fuse panel) s217
(near breakout to radio) s200
(near breakout to rear blower motor relay) s210
(near breakout to rear window defrost relay) s263
(not used)
(rear of left front fender) g104
(rear of right front fender) g105
87a
A/c demand
Amb temp sens input
Ambient air temperature sensor (left front of engine compartment)
Audio/climate control switch assembly
Battery
Blend door 5v+
Blend door act gnd
Blend door actuator
Blend door actuator (behind right side of dash, top of a/c plenum)
Blend door ref
Blower motor (right side of engine compartment)
Blower motor relay
Blower motor speed controller (near blower motor)
Blower mtr fback
Blower mtr rly gnd
Blr mtr rly out
C297
C298
Clockspring assembly
Cruise control
Data (+)
Data (-)
Eatc to clockspring
Electronic automatic temperature control (eatc) module (behind center of dash)
English/metric in
Fan
Fuse 7.5a
Fuse 2 40a
Ground
Hot at all times
Hot in run
I/p fuse panel
Illumination
In car temp sens
In-car temperature sensor (behind top center of dash)
Input ground
Inst illum
Interior lights system
Lamp illum
Message center
Nca
Ohms
Power
Power distribution box (left side of engine compartment, at fender apron)
Rear blr rly gnd
Red
Sound systems
Speed control servo/ amplifier assembly (in right rear engine compartment)
Speed ctrl out
Speed ctrl sw gnd
Sun load sensor (top right side of dash, above glove box)
Sunload sens input
Temp

A/C Wiring Diagram, Auto A/C (2 of 2) for Mercury Mountaineer 1998

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List of elements for A/C Wiring Diagram, Auto A/C (2 of 2) for Mercury Mountaineer 1998:

(left radiator support) g108
(near branch to fuel pump relay) s123
(near breakout to 4wabs control module) s137
(near breakout to a/c compressor clutch) s133
(near breakout to ground g201, under right side of i/p) s205
(near breakout to ground g201, under right side of i/p) s206
(not used)
(rear of left front fender) g104
87a
A/c clutch cycling pressure switch (in right side of engine compartment, on a/c accumulator)
A/c clutch diode (left side of engine compartment, near a/c compressor clutch, taped in harness)
A/c compressor clutch solenoid (on left side of engine compartment)
A/c cps
A/c hpcs input
A/c pressure cutoff switch (near a/c compressor clutch solenoid)
A/c relay
A/c wot output
Connector (dlc) (partial) (behind left side of dash)
Data +
Data -
Data link
Fuse 7.5a
Fuse 10a
Hot at all times
I/p fuse panel
Low
Low med
Med
Off
Pcm power relay
Power distribution box (left side of engine compartment, at fender apron)
Powertrain control module (pcm) (mounted through firewall)
Rear air door actuator (in dash console)
Rear blower motor (in rear of center console)
Rear blower motor relay (behind right side dash)
Rear blower motor resistor (in dash console)
Rear integrated control panel (ricp) (rear blower switch)
Red
S100 (between diode & breakout for a/c compressor clutch solenoid)
S231 (near breakout to rear blower motor)

A/C Wiring Diagram, Manual A/C for Mercury Mountaineer 1998

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List of elements for A/C Wiring Diagram, Manual A/C for Mercury Mountaineer 1998:

(left radiator support) g108
(near breakout for generic electronic module) s229
(near breakout to 4wabs control module) s137
(near breakout to a/c compressor clutch solenoid) s133
(not used)
(rear of left front fender) g104
(rear of right front fender) g105
A/c clutch cycling pressure switch (in right side of engine compartment, on a/c accumulator)
A/c clutch diode (left side of engine compartment, near a/c compressor clutch, taped in harness)
A/c compressor clutch solenoid (on left side of engine compartment)
A/c pressure cutoff switch (near a/c compressor clutch solenoid)
A/c relay (in power distribution box)
Blend door actuator (behind right side of dash, top of a/c plenum)
Blower motor (right side of engine compartment)
Blower motor relay (in power distribution box)
Blower motor resistor (near blower motor)
Blower motor switch
C231
C276
Cold
Def/flr
Defrost
Floor
Fuse 7.5a
Fuse 10a
Fuse 40a
Fuse 7.5a
Heater-a/c control assembly
High speed blower relay (in auxiliary relay box no.2)
Hot at all times
Hot in run
I/p fuse panel
Illumi- nation
Interior lights system
Low
Max a/c
Med
Med hi
Med lo
Norm a/c
Off
Off panel
Panel
Panel/floor
Pcm power relay (in power distribution box)
Power distribution box
Powertrain control module (pcm) (mounted through firewall)
Rear air door actuator (in dash console)
Rear blower motor (in rear of center console)
Rear blower motor resistor (in dash console)
Rear integrated control panel (ricp) (rear blower switch)
Red
S100 (behind diode & breakout for compressor clutch)
S123 (near breakout to fuel pump relay)
S170 (near breakout to blower motor)
S171 (near breakout to evac & fill)
S200 (near breakout to radio)
S210
Solid state
Temperature control potentiometer
To blower motor switch)
To relay module)
Warm

ANTI-LOCK BRAKES

Anti-lock Brake Wiring Diagrams for Mercury Mountaineer 1998

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List of elements for Anti-lock Brake Wiring Diagrams for Mercury Mountaineer 1998:

(near breakout to auxiliary box 3)
(near breakout to relay module)
(rear of left front fender)
(rear of left front fender) g104
4wabs control module (left side of engine compt)
Abs in
Abs ind
Acceleration sensor (left frame rail)
Anti-lock brakes indicator
Batt
Bpp sw
Brake pedal position switch (behind steering column)
C288
Compass/ temperature module, arc module, radio, message center, gem module, instrument cluster, pcm, speed control assembly
Data link connector (left side of dash)
Fuse 10a
Fuse 30a
Fuse 50a
Fuse 7.5a
G sw
G sw 2
G sw1
G104
G104 (rear of left front fender)
Generic electronic module (center of dash)
Ground
Hot at all times
Hot in run
Hot in run or start
I/p fuse panel
Ign
Instrument cluster
Iso lnk
Left front wheel speed sensor
Lf sens
Pmp fd
Power distribution box
Rear axle sensor (on axle assembly)
Red
Red/pnk
Rf sens
Right front wheel speed sensor
Rr sens
S147
S213
S255
Vss out

ANTI-THEFT

Forced Entry Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Forced Entry Wiring Diagram for Mercury Mountaineer 1998:

"r" input
(i/p harn, near breakout to relay module)
(main harness, near breakout to gem)
(near breakout to cluster)
(near breakout to gem) s275
(not used)
(rear of left front fender)
1/2
3/4
5/6
7/8
9/0
Ant
Antenna
Anti- theft hood switch (closed w/ hood open)
Anti-theft indicator
Bat
Boo sw
Brake on/off switch
C280
C281
C286
C287
C336
C338
Com
Data
Data link connector (left side of dash)
Disarm
Door ajar
Door locks
Electronic suspension system
Exterior lights (tr sensor-a/t) (backup sw-m/t)
Fuse 20 7.5a
Fuse 9 20a
Fuse 9 7.5a
G104
G104 (rear of left front fender)
G105 (rear of right front fender)
G108 (left radiator support)
G412 (top center of liftgate)
G500 (left front door)
G600 (right front door)
Generic electronic module (behind center of dash)
Ground
Headlights system (autolamps)
Hood sw
Horn rly
Horns system
Hot at all times
Hot in accy or run
I/p fuse panel (left side of dash)
Ig tamper
Ign
Illumination
Ind led
Instrument cluster
Int lights
Keyless entry switch assembly
Kypd illum
Left front door disarm switch (closed if opened w/ key)
Liftgate disarm switch (closed if opened w/key)
Lo beam
Lock all
Mem 1
Mem 2
Memory system
Nca
Passive anti- theft control module (top right side of dash)
Power distribution box (left side of engine compt, at fender apron)
Red
Remote anti-theft personality module (left rear quarter panel)
Right front door disarm switch (closed if opened w/key)
S160
S161
S215 (i/p harn, near breakout to ignition switch)
S229
S230
S234
S245
S255
S258
S282
S404
S500
S602
Unlck all
Unlck lf

Passive Anti-theft Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Passive Anti-theft Wiring Diagram for Mercury Mountaineer 1998:

(center of dash)
(near breakout to instrument cluster)
Anti- theft ind
Battery
Bus (+)
Bus (-)
Data link connector (left side of dash)
Fuse 25a
Fuse 7.5a
G104 (rear of left front fender)
G108 (left radiator support)
Ground
Hot at all times
Hot in run or start
I/p fuse panel
Ignition
Instrument cluster
Passive anti- theft module (behind top right side of dash)
Passive anti- theft transceiver module (behind center of dash)
Pats ind
Receive
Remote anti-theft personality module (at left rear quarter panel)
Rf power
S205
S206
S229
S242
S282
Transmit

BODY COMPUTER

Body Computer Wiring Diagrams (1 of 2) for Mercury Mountaineer 1998

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List of elements for Body Computer Wiring Diagrams (1 of 2) for Mercury Mountaineer 1998:

(front)
(front-rear)
* central timer
Acc delay relay ctrl
Anti-lock brakes system
Anti-theft system
Battery saver relay ctrl
Brake/run relay ctrl
C280
C283
Computer data lines system
Current sense high
Current sense low
Defogger system
Defrost relay ctrl
Defrost sw in
Diagnostic in
Door ajar ind ctrl
Door disarm in
Door locks system
Door unlock rly ctrl
Down in
Engine controls system
Fasten belt ind ctrl
Fuse 7.5a
G108 (left radiator support)
Generic electronic module/ central timer module (behind center of dash)
Gnd
Hot at all times
Hot in acc or run
Hot in run
Hot in start
I/p fuse panel
Ignition (acc/run)
Ignition (run)
Ignition (start)
Instrument cluster system
Interior lamp relay ctrl
Interior lights system
Interval/delay wash in
Key in ignition sw
Lf door ajar
Liftgate in
Lr door ajar in
Module connectors
One-touch down relay ctrl
Park sense
Park/headlamps on in
Power window system
Power-battery
Rf door ajar
Rr door ajar in
S232
S242
S244
S245
S250 (i/p harn, in breakout to gem module)
S282
Seat belt warn sw in
Signal return
Sound tone in
Tan/red
Throttle position in
Up in
Vehicle speed sensor in
Warning system
Washer pump ctrl
Wiper mode select sw
Wiper speed ctrl
Wiper/washer system

Body Computer Wiring Diagrams (2 of 2) for Mercury Mountaineer 1998

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List of elements for Body Computer Wiring Diagrams (2 of 2) for Mercury Mountaineer 1998:

(i/p harn, in breakout to gem module) s251
(i/p harn, in breakout to gem module) s252
(main harn, near breakout to gem module) s258
(rear)
4-high to 4-low relay ctrl
4-low to 4-high relay ctrl
4wd contact plate out
4wd mode switch
4x4 high range ind ctrl
4x4 low range ind cntrl
4x4 low signal input
4x4 mode sw in
A/t
Air ride control in
Anti-lock brake in
Anti-lock brakes system
Anti-theft system
Anti-theft system (interior lights control)
Brake on/off sw in
Brake pedal position switch (behind steering column)
C281
C282
Contact plate a
Contact plate b
Contact plate c
Contact plate d
Door ajar out
Electronic shift motor transfer case
Electronic suspension system
Front speed sensor in
Fuse 7.5a
G104 (rear of left front fender)
G203 (right kick panel)
Generic electronic module/ central timer module
Gnd (m/t) neutral sense in (a/t)
Hot at all times
I/p fuse panel
Illuminated entry out
Instrument cluster system
M/t
Neutral tow conn
Neutral tow connector (behind center of dash)
Rear speed sensor in
Rear wiper down relay ctrl
Rear wiper mode select in
Rear wiper park sense
Rear wiper up relay
S108
S215 (i/p harn, near breakout to data link conn)
S230
Speed sensor pwr
Tan
Torque on demand relay (right side of dash)
Torque-on-demand out
Transfer case shift relay (behind center of dash)
Transmission range sensor (left side of transmission)
Wiper/washer system

COMPUTER DATA LINES

Computer Data Lines for Mercury Mountaineer 1998

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List of elements for Computer Data Lines for Mercury Mountaineer 1998:

(at left rear quarter panel)
(behind left side of dash) data link connector (dlc)
(behind top rt side of dash) passive anti-theft system module
(main harn, left rear quarter panel) s304
(main harn, right side of dash)
(near breakout to relay module) s255
4wabs control module (left side of engine compt)
Air bag diagnostic monitor (right side of dash)
Automatic ride control (arc) module (left center of dash)
C186
C2000
C233
C280
C297
C336
C337
Dlc bus (+)
Dlc bus (-)
Electronic automatic temperature control (eatc) module (behind center of dash)
Fuse 5 10a
G104 (rear of left front fender)
G108 (left radiator support)
Generic electronic module (gem) (behind center of dash)
Hot at all times
I/p fuse panel
Memory seat module (below left front seat)
Powertrain control module (pcm) (mounted through firewall)
Remote anti-theft personality (rap) module
S205
S206 (main harn, right side of dash)
S230
S232

CRUISE CONTROL

Cruise Control Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Cruise Control Wiring Diagram for Mercury Mountaineer 1998:

(w/ aux controls)
(w/o aux controls)
4wabs control module (left side of engine compartment)
A/t w/ high series console
A/t w/o high series console
Accel
Back light
Brake pedal position (bpp) switch (behind steering column)
Brake press input
Brake pressure switch (left rear corner of engine compt)
C186
C286
C338
Clockspring assembly (in steering column assembly)
Clutch pedal position (cpp) switch (on clutch pedal arm)
Clutch pedal position (cpp) switch jumper (left side of dash, taped to main harness)
Coast
Fuse 10 15a
Fuse 20a
Fuse 7.5a
G104 (rear of left front fender)
G105 (rear of right front fender)
G108 (left radiator support)
Ground
Headlamp switch
Horn relay (in power distri- bution box)
Horn switches
Hot at all times
Hot in run
I/p fuse panel
Ignition
Indicator control
Instrument cluster
Interior lights system
M/t
Nca
Off
Ohms
Pnk
Power distribution box
Rear axle sensor (on axle assembly)
Red/
Red/ lt grh
Remote anti-theft personality (rap) module (at left rear quarter panel)
Resume
S161
S168 (near breakout to 4wabs control module)
S215 (near breakout to ignition switch)
S230
S232
S244
Set/
Speed cont sw gnd
Speed cont sw in
Speed control indicator lamp
Speed control servo/ amplifier assembly (in right rear of engine compartment)
Vehicle speed input

DEFOGGERS

Defogger Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Defogger Wiring Diagram for Mercury Mountaineer 1998:

(rear of left front fender)
87a
C280
C283
Defrost on/off switch
Defrost relay control
Defrost switch input
Fuse 10a mini
Fuse 15a mini
Fuse 30a mini
G104
G410 (right top corner of liftgate)
G500 (in left front door)
G600 (in right front door)
Generic electronic module (behind center of dash)
Heated rear window switch
Hot at all times
Hot in run
I/p fuse panel (left side of vehicle, below dash)
Illum
Interior lights system
Left power/ heated mirror
Nca
On indicator
Power dist box (left side of engine compt, at fender apron)
Rear window defrost grid
Rear window defrost relay (behind top right side of dash)
Right power/ heated mirror
S207
S221
S222
S229
S405 (body harn, near breakout to heated glass)
S500
S602

ELECTRONIC SUSPENSION

Electronic Suspension Wiring Diagram (1 of 2) for Mercury Mountaineer 1998

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List of elements for Electronic Suspension Wiring Diagram (1 of 2) for Mercury Mountaineer 1998:

(i/p harn, near breakout to inst cluster)
(main harn, near breakout to arc module)
(near breakout to relay module)
(rear of left left front fender)
4wabs control module (left side of engine compt)
4x4 high sig
4x4 low sig
Arc accel sig
Arc compr rly
Arc off/on sw
Automatic ride control (arc) module (left center of dash)
Automatic ride control compressor assembly (at rear of vehicle)
Automatic ride control off/on switch (rear of vehicle)
Automatic ride control relay
Auxiliary relay box 1 (left side of engine compartment)
Brake on/off sw
C2000
C2001
Comp vent sol
Data link connector (left side of dash)
Door ajar in
Front fill sol
Fuse 8 20a
Fuse 9 40a
G104
G104 (rear of left front fender)
G105 (rear of right front fender)
G108 (left radiator support)
G200 (left kick panel)
Gnd
Height sen power
Hot at all times
Iso link
Left front shock actuator (at left front shock)
Left rear shock actuator (at left rear shock)
Lf height sen
Lf shock actuator
Lf shock pos in
Lr shock actuator
Lr shock pos in
Nca
Pcm accel sig
Pnk
Power (hot in run)
Power distribution box
Powertrain control module (pcm) (mounted through firewall)
Rear fill sol
Rear gate sol
Rear height sen
Red
Rf shock actuator
Rf shock pos in
Right front shock actuator (at right front shock)
Right rear shock actuator (at right rear shock)
Rr shock actuator
Rr shock pos in
S153
S161
S230
S232
S247
S253
S255
S351
Steering rate sensor (in steering column)
Steering sensor
Vss (+)
Warning sig

Electronic Suspension Wiring Diagram (2 of 2) for Mercury Mountaineer 1998

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List of elements for Electronic Suspension Wiring Diagram (2 of 2) for Mercury Mountaineer 1998:

(in main harn, near gem breakout)
Brake on/off switch (on brake pedal)
C2008
C2009
C281
C282
C336
Front fill solenoid (left rear corner of engine compt)
Fuse 1o 7.5a
Fuse 9 7.5a
G104 (rear of left front fender)
G108 (left radiator support)
G200 (left kick panel)
Generic electronic module (gem) (behind center of dash)
Hot at all times
Hot in run
I/p fuse panel
Left front height sensor (at left front shock)
Message center (in instrument panel console)
Rear fill solenoid (on rear axle)
Rear gate solenoid (left rear corner of vehicle)
Rear height sensor (left rear corner of vehicle)
Red/
Remote anti-theft personality (rap) module (left rear quarter panel)
S137
S215 (i/p harn, near breakout to ignition switch)
S230
S234
S241
S256 (i/p harn, near breakout to inst cluster)
S258
S351

ENGINE PERFORMANCE

4.0L

4.0L SOHC, Engine Performance Wiring Diagrams (1 of 4) for Mercury Mountaineer 1998

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List of elements for 4.0L SOHC, Engine Performance Wiring Diagrams (1 of 4) for Mercury Mountaineer 1998:

(left radiator support) g108
(right side of dash)
A/c
Air conditioning system (htr-a/c assy)
Air susp input
Awd indicator
C283
Case gnd
Central timer module (ctm)/ generic electronic module (gem) (behind center of dash)
Ckp sensor (+)
Ckp sensor (-)
Crankshaft position sensor (lower front of engine compt)
Crankshaft position sensor shield
Data link
Data link (+)
Data link (-)
Data link connector (behind left side of dash)
Digital transmission range sensor (dtr sensor) (left side of transmission)
Ect sens
Electronic suspension system
Evr ctrl
Fuel flow rate
Fuel level in
Fuel pump mon
Fuse 15a
Fuse 25a
Fuse 30a
G203
G203 (right side of dash)
Gem
Ho2s 2 sig
Hot at all times
Hot in run
Hot in run or start
Iat sens
Ign coil
Ignition coil (above valve cover)
Imcc
Instrument cluster system
Interior fuse panel
Maf sig rtn
Mil
Oss
Pcm power diode
Pcm power relay
Power distribution box
Powertrain control module (mounted through firewall)
Pwr gnd
R n
Radio noise capacitor (left of ignition coil)
Red
S105
S108
S118 (near breakout to fuel injector 3)
S205
S206 (near breakout to ground g901)
S207
Shift sol 1
Shift sol 2
Shift sol 4
Spark plugs
Tachometer
To dtr sensor (diagram 4 of 4)
Tr1
Tr2a
Tr4a
Trans ctrl sw
Trans temp
Transmission control switch

4.0L SOHC, Engine Performance Wiring Diagrams (2 of 4) for Mercury Mountaineer 1998

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List of elements for 4.0L SOHC, Engine Performance Wiring Diagrams (2 of 4) for Mercury Mountaineer 1998:

(behind right kick panel) inertia fuel shut-off switch
(near breakout to 12-pin conn at left side of engine compt) s127
(near breakout to instr cluster)
(near breakout to map sensor)
(near breakout to throttle position sensor)
4wd "low range" ind input
C2008
C2009
Differential pressure feedback egr sensor (rear of engine compt)
Engine coolant temperature sensor (left of throttle body)
Fuel flow rate input
Fuel pump
Fuel pump relay
Fuel reset switch indicator input
Fuel tank assembly
Fuse 20a
G108 (left radiator support)
G200 (left kick panel)
Hot at all times
Instrument cluster
Intake air temperature sensor (on intake manifold)
Intake manifold communicator control (near intake manifold)
Knock sensor (near intake manifold)
Knock sensor shield 1
Knock sensor shield 2
Malfunction indicator input
Message center
Nca
Output shaft speed sensor (left rear of transmission)
Power distribution box
Pressure transducer
Red
Red/pnk
S105
S136
S146
S160
S235
S248
Tach input
Tcil ground input
Throttle position sensor (on throttle body)

4.0L SOHC, Engine Performance Wiring Diagrams (3 of 4) for Mercury Mountaineer 1998

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List of elements for 4.0L SOHC, Engine Performance Wiring Diagrams (3 of 4) for Mercury Mountaineer 1998:

(near breakout to fuel injector 6)
(near breakout to fuel pump relay) s123
4 wheel anti-lock brake system (4wabs) module (left side of engine compt)
5r55e transmission
Air conditioning system (a/c relay)
Egr vacuum regulator solenoid (left side of engine)
Electronic pressure control solenoid
Evaporative emmissions canister purge valve (left front of engine compt)
Evaporative emmissions canister vent solenoid (left front of engine compt)
Fuel injectors
Idle air control valve (left side of intake manifold)
Rear axle sensor (on axle assembly)
Red
Red/pnk
S124 (near breakout to fuel injector 4)
S166
S167
Shift solenoids
Ss1
Ss2
Ss3
Ss4
Tan
To 4wabs module)
Torque converter clutch solenoid
Transmission fluid temperature sensor
Turbine shaft speed sensor

4.0L SOHC, Engine Performance Wiring Diagrams (4 of 4) for Mercury Mountaineer 1998

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List of elements for 4.0L SOHC, Engine Performance Wiring Diagrams (4 of 4) for Mercury Mountaineer 1998:

(behind column) brake pedal position switch
(in breakout for pcm)
(near breakout to 16-pin conn at rear of engine compt)
(near breakout to 4-pin conn at right rear of engine compt)
(near breakout to auxiliary relay box 3)
270 ohms
A/c press
Air conditioning system (a/c press sw)
Air conditioning system (a/c relay)
Bpp switch
Cam pos in
Camshaft position sensor (rear of engine)
Camshaft position sensor shield
Digital transmission range sensor (dtr sensor-a/t) (left side of transmission)
Dpfe sens
Epc sol
Evap
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 pump ctrl
Fuse 10a (mini)
Fuse 15a (mini)
Fuse 7.5a
G108 (left radiator support)
G203 (right side of dash)
Heated oxygen sensor 1 (on exhaust pipe)
Heated oxygen sensor 2 (on exhaust pipe)
Heated oxygen sensor 3 (on exhaust pipe)
Heated oxygen sensor 4 (on exhaust pipe)
Heater ctrl
Ho2s 1
Ho2s 1 sig
Ho2s 2
Ho2s 2 sig
Ho2s 3
Ho2s 4
Ho2s 4 sig
Hot at all times
Iac sol
Ign coil
Interior fuse panel
Kapwr (+)
Knock sens
Maf sens in
Mass air flow sensor (right rear corner of engine compt)
Nca
Not used
Power
Power distribution box
Power gnd
Powertrain control module (mounted through firewall)
Press trnsducr
Pwr gnd
Red
Red/pnk
Ref volt
S101
S105
S108
S142
S180
Shift sol 3
Sig rtn
Tan
Tcc sol
Tp sens in
Tr3a
Trans ctrl ind
Tss
Vapor valve
Vpwr
Vss (+)
Wac

5.0L

5.0L, Engine Performance Wiring Diagrams (1 of 4) for Mercury Mountaineer 1998

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List of elements for 5.0L, Engine Performance Wiring Diagrams (1 of 4) for Mercury Mountaineer 1998:

(left radiator support) g108
(near breakout to fuel injector 3)
(right side of dash) g203
A/c
Air conditioning
Air conditioning system (htr-a/c assy)
Air susp input
Case gnd
Ckp sensor (+)
Ckp sensor (-)
Crankshaft position sensor (lower front of engine compt)
Crankshaft position sensor shield
Data link
Data link (+)
Data link (-)
Data link connector (behind left side of dash)
Ect sens
Electronic suspension system
Evr ctrl
Fuel flow rate
Fuel level in
Fuel pump mon
Fuse 15a
Fuse 25a
Fuse 30a
G108 (left radiator support)
G203 (right side of dash)
Ho2s 2 sig
Hot at all times
Hot in run
Hot in run or start
Iat sens
Ign coil 1
Ign coil 2
Ignition coil 1 & 2 (left front of engine)
Ignition coil 3 & 4 (right front of engine)
Instrument cluster system
Interior fuse panel
Maf sig rtn
Mil
Not used
Pcm power diode
Pcm power relay
Power distribution box
Powertrain control module (mounted through firewall)
Pwr gnd
Radio noise capacitor (left of ignition coil)
Red
S105
S108
S118
S123 (near breakout to fuel pump relay)
S205
S206 (near breakout to ground g901)
S207
Shift sol 1
Shift sol 2
Spark plugs
Tachometer
Tr1
Tr2a
Tr4a
Trans ctrl sw
Trans temp
Transmission control switch

5.0L, Engine Performance Wiring Diagrams (2 of 4) for Mercury Mountaineer 1998

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List of elements for 5.0L, Engine Performance Wiring Diagrams (2 of 4) for Mercury Mountaineer 1998:

(behind right kick panel) inertia fuel shut-off switch
(near breakout to 12-pin conn at left side of engine compt) s127
(near breakout to fuel injector 6)
(near breakout to insrument cluster)
(near breakout to throttle position sensor)
C286
C287
Differential pressure feedback egr sensor (rear of engine compt)
Digital transmission range sensor (dtr sensor) (left side of transmission)
Engine coolant temperature sensor (left of throttle body)
Fuel pump
Fuel pump relay
Fuel reset switch indicator input
Fuel tank assembly
Fuse 20a
G200 (left kick panel)
Hot at all times
Instrument cluster
Intake air temperature sensor (on intake manifold)
Malfunction indicator input
Nca
Output shaft speed sensor (left rear of transmission)
Power distribution box
Pressure transducer
R n
Red
Red/pnk
S146
S160
S166
S235
Tach input
Tcil ground input
Throttle position sensor (on throttle body)
To dtr sensor (diagram 4 of 4)

5.0L, Engine Performance Wiring Diagrams (3 of 4) for Mercury Mountaineer 1998

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List of elements for 5.0L, Engine Performance Wiring Diagrams (3 of 4) for Mercury Mountaineer 1998:

(near breakout to fuel injector 4)
(near breakout to fuel injector 6)
(near breakout to fuel injector 7)
4r7ow transmission
C2008
C2009
Egr vacuum regulator solenoid (left side of engine)
Electronic pressure control solenoid
Evaporative emmissions canister purge valve (left front of engine compt)
Evaporative emmissions canister vent solenoid (left front of engine compt)
Fuel flow rate input
Fuel injectors
Idle air control valve (left side of intake manifold)
Message center
Red
Red/pnk
S117
S124
S167
Shift solenoids
Ss1
Ss2
Tach input
Tan
Tan/ red
Tan/red
Torque converter clutch solenoid
Transmission fluid temperature sensor

5.0L, Engine Performance Wiring Diagrams (4 of 4) for Mercury Mountaineer 1998

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List of elements for 5.0L, Engine Performance Wiring Diagrams (4 of 4) for Mercury Mountaineer 1998:

(behind column) brake pedal position switch
(in breakout for pcm)
(near breakout to 4-pin conn at right rear of engine compt)
(near breakout to auxiliary relay box 3)
(near breakout to egr valve position sensor)
270 ohms
4 wheel anti-lock brake system (4wabs) module (left side of engine compt)
A/c press
A/c relay
Air conditioning system (a/c press sw)
Air conditioning system (a/c relay)
Bpp switch
Cam pos in
Camshaft position sensor (rear of engine)
Camshaft position sensor shield
Digital transmission range sensor (dtr sensor-a/t) (left side of transmission)
Dpfe sens
Epc sol
Evap
From dtr sensor (diagram 2 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
Fuse 10a (mini)
Fuse 15a (mini)
Fuse 7.5a
G108 (left radiator support)
G203 (right side of dash)
Heated oxygen sensor 1 (on exhaust pipe)
Heated oxygen sensor 2 (on exhaust pipe)
Heated oxygen sensor 3 (on exhaust pipe)
Heated oxygen sensor 4 (on exhaust pipe)
Heater ctrl
Ho2s 1
Ho2s 1 sig
Ho2s 2
Ho2s 2 sig
Ho2s 3
Ho2s 4
Ho2s 4 sig
Hot at all times
Iac sol
Ign coil 3
Ign coil 4
Interior fuse panel
Kapwr (+)
Maf sens in
Mass air flow sensor (right rear corner of engine compt)
Nca
Oss
Power
Power distribution box
Power gnd
Powertrain control module (mounted through firewall)
Press trnsducr
Pwr gnd
Rear axle sensor (on axle assembly)
Red
Red/pnk
Ref volt
S101
S105
S108
S119
S142
Sig rtn
Tan
Tan/red
Tcc sol
To 4wabs module)
Tp sens in
Tr3a
Trans ctrl ind
Vapor valve
Vpwr
Vss (+)

EXTERIOR LIGHTS

Backup Lamps Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Backup Lamps Wiring Diagram for Mercury Mountaineer 1998:

(body harn, near liftgate washer pump motor breakout)
A/t
Backup lamp switch (left side of transmission)
C336
Day/night mirror/ auto lamp sensor (in rear-view mirror)
Digital transmission range (dtr) sensor (left side of transmission)
Fuse 15a
Hot in run
I/p fuse panel (left side of vehicle below dash)
Left backup lamp
M/t
Panel) g200
Remote anti-theft personality module (at left rear quarter panel)
Right backup lamp
S120
S207
S235
S302
S307

Exterior Lamps Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Exterior Lamps Wiring Diagram for Mercury Mountaineer 1998:

(body harn, left side of liftgate)
(body harn, near liftgate washer pump motor breakout)
(body harn, near right stop/park lamp breakout)
(dash harn, near dash panel console breakout) s233
(dash harn, near relay module breakout) s244
(eng harn, near left front park/ turn lamp breakout)
(eng harn, near left front park/ turn lamp breakout) s126
(eng harn, near trans connector) s122
(rear of left front fender) g104
(rear)
* w/ center
** w/o center
Anti-theft system
Anti-theft system (rap module)
Ballast
Batt
Brake pedal position switch (behind steering column)
C216
C217
C280
C286
C287
Central timer module (ctm)/ generic electronic module (gem) (behind center of dash)
Console
Day/night mirror/ autolamp sensor (in rear-view mirror)
Dimmer relay (in relay module)
Explorer only
Fuse 15a
Fuse 20a
Fuse 7.5a
G104 (rear of left front fender)
G105 (rear of right front fender)
G200 (left kick panel)
G412 (top center of liftgate)
Gnd
Hazard
Head
Headlamp relay (in relay module)
Headlamp switch
High mount stop lamp assembly
Hot at all times
Hot in run
I/p fuse panel (left side of vehicle, below dash)
Ign (run)
Instrument cluster
Lamp out warning module (in dash panel console)
Lamps on
Left front park/ turn lamps
Left front side marker lamp
Left license lamp
Left rear stop/ park lamp
Left turn indicator
Left turn signal lamp (rear)
Multi-function
Nca
Normal
Off
Park
Park lamp relay (in relay module)
Relay ctrl
Right front park/ turn lamps
Right front side marker lamp
Right license lamp
Right rear stop/ park lamp
Right turn indicator
Right turn signal lamp
S154
S155
S158
S212 (i/p harn, near data link conn breakout)
S229
S235
S267 (dash harn, near left kick panel)
S300
S301
S302
S305
S401
S404
Switch
Trailer tow park lamp relay (in auxiliary relay box 2)
Trailer/camper adapter circuit (stop/turn fuses)
Turn left
Turn right
Turn/hazard control
Turn/hazard flasher (in steering column)
W/ lamp out warning
W/ trailer tow
W/o lamp out warning

Lamp Outage Module Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Lamp Outage Module Wiring Diagram for Mercury Mountaineer 1998:

Brake lamp out
C2008
C2009
Exterior lights circuit (brake on/off switch)
Exterior lights circuit (park lamp relay)
Exterior lights circuit (rear lamps)
Fuse 7.5a
G104 (rear of left front fender)
Ground
Hdlp input
Hdlp out
Hdlp ref
Headlights system (interior fuse panel)
Headlights system (left headlamp)
Headlights system (right headlamp)
Hot in run
I/p fuse panel (left side of vehicle, below dash)
Ignition (run)
L hdlp output
Lamp out warning
Lamp out warning module (module not functional, used as a bypass to lamp wiring) (in dash panel console)
Message center
Prk lamp output
Pwr
R hdlp output
R prk lamp input
R prk lamp out
S210
S231
Stop lamp input
Stop lamp output

Trailer/Camper Adapter Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Trailer/Camper Adapter Wiring Diagram for Mercury Mountaineer 1998:

(license lamps)
(park lamp relay)
Exterior lamps circuit
Fuse 15a
Fuse 7.5a
G200 (left kick panel)
Hot at all times
I/p fuse panel (left side of vehicle, below dash)
Multi- function switch
Right turn/ stop sig
S302
Stop lamp)
Trailer tow park lamp relay (in auxiliary relay box 2)
Trailer/ camper adapter (ground)
Trailer/ camper adapter (left turn/ stop lamp)
Trailer/ camper adapter (park lamps)
Trailer/ camper adapter (right turn/

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 4) for Mercury Mountaineer 1998

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List of elements for Ground Distribution Wiring Diagram (1 of 4) for Mercury Mountaineer 1998:

(near breakout to generic electronic module)
(near breakout to rear blower motor)
(near breakout to starter motor relay)
4wabs control module
A/c clutch diode
A/c compressor clutch solenoid
A/c turn hazard flasher
Ashtray illumination
Auxiliary power
Battery
Blend door actuator
Blower motor speed controller
Brake fluid level warning switch
Brake pedal position switch
C118
C2003
C2004
C2009
C286
C287
C288
Cigar lighter
Data link connector
Dimmer module
Electronic automatic temperature control
Fog lamp switch
G104 (rear of left front fender)
G105 (rear of right front fender)
G111 (near battery)
Headlamp switch
Heated rear window switch
Heater/ a/c control asembly
Heater/ a/c control asembly illumination
High speed blower relay
Ignition switch
Instrument cluster
Lamp out warning module
Left fog lamp
Left front park/ turn lamp
Left front shock actuator
Left front side marker lamp
Left headlamp
Lift gate wiper/ washer switch
Message center
Message center switch assembly
Power antenna module
Power distribution box
Premium sound radio
Radio or front control unit
Rear integrated control panel
Rear wiper down relay
Rear wiper up relay
S104 (in breakout for wiper motor)
S154
S155 (near breakout to ignition control module)
S200 (near breakout to radio)
S229
S230 (near breakout to data link connector)
S231
Shift lock actuator
Starter motor relay
Torque on demand relay
Transfer case shift relay
W/ eatc
W/ high series console
W/ lux radio
W/ message center
W/0 high series console
W/o eatc
W/o lux radio
W/o message center
Wiper motor

Ground Distribution Wiring Diagram (2 of 4) for Mercury Mountaineer 1998

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List of elements for Ground Distribution Wiring Diagram (2 of 4) for Mercury Mountaineer 1998:

A/c pressure cutoff switch
A/t
Air bag diagnostic monitor
Anti- theft hood switch
Automatic ride control module
Automatic ride control relay
Auxiliary relay box 1
C202
C232
C233
Camshaft position sensor
Camshaft position sensor shield
Central timer module/ generic electronic module
Clockspring assembly
Crankshaft position sensor shield
Data link connector
Digital transmission range sensor
Engine low oil/ temperature switch
Front washer pump relay
Fuel tank assembly
G105 (rear of right front fender)
G108 (left radiator support)
G203 (right side of dash)
Generic electronic module
Instrument cluster
Knock sensor
Knock sensor shield 1
Knock sensor shield 2
Left front height sensor
Low washer fluid level switch
M/t
Mass air flow sensor
Memory seat module
Message center
Message center switch assembly
Passive anti-theft control module
Pcm power relay
Power distribution box
Powertrain control module
Rear height sensor
Rear washer control relay
Remote anti-theft personality module
Right fog lamp
Right front park/ turn lamp
Right front shock actuator
Right front side marker lamp
Right headlamp
S105 (in breakout for powertrain control module)
S108 (in breakout for powertrain control module)
S161 (near breakout to anti-theft hood switch)
S223 (near breakout to g200)
S232 (near breakout to rear window defrost relay)
S234 (inside left rear door jamb)
Speed control servo/ amplifier assembly
Steering rate sensor
W/ 4.0l sohc

Ground Distribution Wiring Diagram (3 of 4) for Mercury Mountaineer 1998

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List of elements for Ground Distribution Wiring Diagram (3 of 4) for Mercury Mountaineer 1998:

(2 door) left front power door lock switch
(2 door) left front power window switch
(4 door) master window door lock control switch
(left front of engine compartment)
(w/ power equipment group) liftgate lock switch
(w/ trailer adapter) trailer/ camper adapter
2 door
4 door
4 door only
4 door w/ power equipment group
Automatic ride control compressor assembly
Auxiliary relay box 2
Cargo lamp
Compass/ outside air temperature module
Day/night mirror autolamp sensor
Door lock relay
Door unlock relay
Front fill solenoid
Fuel tank assembly
G200 (left kick panel)
G500 (in left front door)
G700 (in left rear door)
Keyless entry switch assembly
Left backup lamp
Left front door courtesy lamp
Left front door disarm switch
Left front power seat control switch
Left power lumbar motor
Left power/ heated mirror
Left rear power window switch
Left rear shock actuator
Left rear stop/ park lamp
Left turn signal lamp
Memory seat module
Memory seat switch
Moonroof control switch
Moonroof motor
Power mirror switch
Rear fill solenoid
Rear gate solenoid
Right rear shock actuator
S202 (near breakout to left vanity mirror lamp)
S235 (inside left rear door jamb)
S302 (near breakout to liftgate washer pump motor)
S321 (seat ctrl feed harn, under driver's seat)
S351
S500 (near breakout to left front door lock)
S700 (near breakout to left rear window switch)
Seat belt warning switch
To s301 (diagram 4 of 4)
Trailer tow park lamp relay
W/ automatic ride control
W/ electronic group only
W/ heated mirrors
W/ memory seats
W/ power equipment group
W/ trailer adapter
W/o power equipment group

Ground Distribution Wiring Diagram (4 of 4) for Mercury Mountaineer 1998

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List of elements for Ground Distribution Wiring Diagram (4 of 4) for Mercury Mountaineer 1998:

(in breakout to right stop lamp)
(near breakout for g600)
4 door w/ power equipment group
Ballast
From s235 (diagram 3 of 4)
G410 (right top corner of liftgate)
G412 (top center of liftgate)
G414 (front of left quarter panel)
G600 (in right front door)
G800 (in right rear door)
G901 (right "a" pillar)
High mount stop lamp assembly
Left liftgate ajar switch
Liftgate wiper disable switch
Liftgate wiper motor
Premium sound amplifier
Premium sound radio
Radio or front control unit
Rear window defrost grid
Right backup lamp
Right front door courtesy lamp
Right front door disarm switch
Right front power door lock switch
Right front power seat control switch
Right front power window switch
Right liftgate ajar switch
Right power lumbar motor
Right power/ heated mirror
Right rear power window switch
Right stop/ park lamp
Right turn signal lamp
S205 (near breakout to g201)
S301
S352 (near breakout to rear chassis unit)
S404 (left side of liftgate)
S602
S800 (near breakout to right power window switch)
W/ electronic group
W/ heated mirrors
W/ power equipment group
W/ premium sound
W/o power equipment group
W/o premium sound

HEADLIGHTS

Autolamps Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Autolamps Wiring Diagram for Mercury Mountaineer 1998:

(eng compt harn, near left front of eng compt)
(eng compt harn, near left headlamp breakout) s112
(i/p harn, near left kick panel) s267
C210
C280
C287
C338
Day/night mirror/ autolamp sensor (mounted in rear view mirror)
Day/nt mir out
Dimmer relay
Dimmer switch
Exterior lights system
Flash-to- pass switch
Fuse 10a
Fuse 15a
Fuse 30a
Fuse 7.5a
G104 (rear of left front fender)
G105 (rear of right front fender)
G200 (left kick panel)
Generic electronic module (gem) (behind center of dash)
Ground
Head
Headlamp relay
Headlamp switch
Headlamps circuit (w/ drl) (daytime running lamps module pin 6)
Headlamps circuit (w/ drl) (daytime running lamps module pin 8)
Headlamps/ fog lamps circuit
Hi beam indicator
Hot at all times
Hot in start or run
I/p fuse panel
Ignition
Instrument cluster
Lamp out warning module (in dash panel console)
Left headlamp
Memory system (memory seats)
Mirrors system (automatic day/night miror)
Multi- function switch
Off
Park
Park lamp relay
Pass
Power
Power distribution box
Relay module (behind center of dash)
Relay output
Remote anti-theft personality (rap) module (at left rear quarter panel)
Right headlamp
S103
S111
S155
S202
S209
S213
S229
S237
S266 (i/p harn, near headlamp switch breakout)
W/ drl
W/ lamp out warning
W/ memory seat
W/o drl
W/o lamp out warning
W/o memory seat

Headlamps/Fog Lamps Wiring Diagram, with DRL for Mercury Mountaineer 1998

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List of elements for Headlamps/Fog Lamps Wiring Diagram, with DRL for Mercury Mountaineer 1998:

(eng compt harn, near left front of eng compt) s111
(eng compt harness, nearleft headlamp breakout) s112
Acc
Battery
Brake fluid level warning switch (mounted on left side of master cylinder)
Brake indicator
Breakout)
C210
C216
C287
C288
Daytime running lamps (drl) module (left front corner of engine compt)
Dimmer switch
Drl disable
Flash-to- pass switch
Fuse 11 7.5a
Fuse 12 30a
Fuse 27 10a
Fuse 33 15a
Fuse 4 10a
Fuse 4 15a
Fuse 8 10a
G104 (rear of left fender apron)
G105 (rear of right fender apron)
Head
Headlamp switch
Headlamps
Headlamps circuit (w/ autolamps)
Headlamps/ fog lamps circuit (fog lamp relay)
Hi beam ind feed
Hi beam indicator
Hot at all times
Hot in run
Hot in run or start
Ign feed
Ignition switch
Instrument cluster
Interior fuse panel
Lamp out warning module (in dash panel console)
Left headlamp
Lock
Low
Multi- function switch
Normal
Off
Park
Parking brake switch (on right side of parking brake lever)
Pass
Power distribution box
Right headlamp
Run
S103
S153
S155
S176 (eng compt harn, near brake press switch breakout)
S207
S213
S229
S237
Start
W/ lamp out warning
W/o lamp out warning

Headlamps/Fog Lamps Wiring Diagram, without DRL for Mercury Mountaineer 1998

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List of elements for Headlamps/Fog Lamps Wiring Diagram, without DRL for Mercury Mountaineer 1998:

(eng compt harn, near left front of eng compt) s111
(eng compt harn, near left front of eng compt) s172
(i/p harn, near headlamp switch breakout)
C210
C216
C287
Dimmer switch
Flash-to- pass
Fog lamp relay
Fog lamp switch
Fuse 15a
Fuse 30a
Fuse 33 15a
Fuse 4 10a
Fuse 8 10a
G104 (rear of left fender apron)
G105 (rear of right fender apron)
Head
Headlamp switch
Hi beam indicator
Hot at all times
Illum
Instrument cluster
Interior fuse panel
Interior lights system
Lamp out warning module (in dash panel console)
Left fog lamp
Left headlamp
Multi- function switch
Off
Park
Pass
Power distribution box
Relay box no1
Right fog lamp
Right headlamp
S103
S112 (eng compt harn, near left headlamp breakout)
S115
S155
S158
S229
S237
S266
W/ fog lamps only
W/ lamp out warning
W/o lamp out warning

HORN

Horn Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Horn Wiring Diagram for Mercury Mountaineer 1998:

* w/o auxiliary
** with auxiliary
C220
C338
Clock- spring assembly
Controls
Front of radiator support)
Fuse 10 15a mini
G108 (left radiator support)
High pitch horn (left
Horn relay
Horn switches
Hot at all times
Nca
Power distribution box (left side of engine compartment, at fendor apron)
Remote anti-theft personality module (at left rear quarter panel)
S232

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 2) for Mercury Mountaineer 1998

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List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Mercury Mountaineer 1998:

"anti-theft" indicator
"brake" indicator
"door ajar" indicator
"fasten seatbelt" indicator
(4.0l ohv & 5.0l)
(4.ol sohc)
(center of dash) s274
(eng compt harn, near a/c relay)
(eng compt harn, near gem) s275
(i/p harn, near breakout to inst cluster)
4.0l ohv & 5.0l
4.0l sohc
4wd indicator (hi-range)
4wd indicator (lo-range)
Acc
Air bag indicator
Anti-lock brakes system
Anti-lock indicator
Anti-theft system
Brake fluid level warning switch (mounted on low left side of master cylinder)
C286
C287
C288
Charge indicator
Check gauge
Cruise control system
Daytime running lamps (drl) module (left front corner of eng compt)
Dc out
Dimmer module (left side of steering column)
Dimmer relay (in relay module, behind center of dash)
Engine controls system
Engine coolant temperature gauge
Engine coolant temperature sender (behind gen bracket)
Engine oil pressure gauge
Engine oil pressure switch (on engine, next to power steering pump)
Exterior lights system
Fuel guage
Fuel reset switch indicator
Fuel tank assembly
Fuse 15a
Fuse 7.5a
G104 (rear of left front fender)
G108 (left radiator support)
Head
Headlamp switch
Headlights system
Hi beam
Hot at all times
Hot in run or start
I/p fuse panel (left side of vehicle, below dash)
Ignition switch
Illumination lamps
Instrument cluster
Interior lights system
Left turn
Lock
Malfunction indicator lamp
Off
Park
Parking brake switch (on right side of parking brake lever)
Right turn
Run
S104
S128
S154
S176 (eng compt harn, near breakout to brk press switch)
S213
S228
S229
S232
S234
S242
S264
S276
Slosh module
Speed control indicator
Speedometer/ odometer
Start
Starting/charging system
Tachometer
Tachometer data link connector (right rear corner of engine compt)
Transmission control indicator (tcil)
Voltmeter
W/ drl
W/o drl
Warning system
Warning systems

Instrument Cluster Wiring Diagram (2 of 2) for Mercury Mountaineer 1998

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List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Mercury Mountaineer 1998:

(arc) disable switch input
(arc) warning input oil temp/ level sense english/metric output (gem) to message center
(i/p harn, near breakout to instr cluster) s247
1/c2008
10/c2008
11/c2008
12/c2008
2/c2008
21/c2009
22/c2009
23/c2009
24/c2009
25/c2009
26/c2009
27/c2009
28/c2009
29/c2009
3/c2008
30/c2009
31/c2009
32/c2009
33/c2009
34/c2009
35/c2009
36/c2009
4/c2008
4wabs control module (left side of engine compt)
5.0l only
5/c2008
6/c2008
7/c2008
8/c2008
9/c2008
Air conditioning system
Battery
Brake
C186
C2008
C2009
C280
Electronic suspension system
Engine select
Engine temp sense
Fuel flow input
Fuel flow rate output
Fuel level input
Fuse 7.5a
G104 (rear of left front fender)
G105 (rear of right front fender)
G108 (left radiator support)
Generic electronic module (behind center of dash)
Ground
Head
Hot at all times
Hot in run
I/p fuse panel (left side of vehicle, below dash)
Illumination feed
Interior lights system
Lamp out warning
Lamp out warning module (in dash panel console)
Low engine oil/ temperature switch (left side of engine, on oil pan)
Low washer fluid level switch (in washer reservoir)
Low washer fluid sense
Message center
Message center switch assembly
Message center switch input
Oil temp/ level sense
Powertrain control module (mounted through firewall)
Rear axle sensor (on axle assembly)
Red
Red/pnk
S137
S161
S168 (engine compt harn, near 4wabs ctrl module)
S209
S231
S233
S241
Sound tone request
Speed sensor input
Switch bank
Tach input
Tail

Overhead Console Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Overhead Console Wiring Diagram for Mercury Mountaineer 1998:

Central junction box (behind left side of dash)
Compass
Compass/outside air temperature module
Engine controls system (vehicle speed sensor)
Fuse 7.5a
G200 (left kick panel)
Hot in run
Interior lights system (courtesy lamps circuit)
Interior lights system (instrument illumination circuit)
Microprocessor
Outside air temperature sensor (left front of engine compt, in front of radiator)
Power distribution system
S202
S244
Thermometer

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Courtesy Lamps Wiring Diagram for Mercury Mountaineer 1998:

(near left kick panel)
Bat saver rly ctrl
Battery saver relay
C280
C283
Cargo lamp
Central timer module (ctm)/ generic electronic module (gem) (behind center of dash)
Cluster breakout)
Compass/ outside air temperature module
Dimmer module (left side of steering column)
Dome lamp
Fuse 26 10a
G200 (left kick panel)
G412 (top center of lifgate)
G414 (front of left quarter panel)
G500 (in left front door)
G600 (in right front door)
Hot at all times
I/p fuse panel
Instrument illumination circuit
Int lamp rly ctrl
Interior lamp relay
Left front door ajar switch
Left front door courtesy lamp
Left liftgate ajar switch
Left rear door ajar switch
Left vanity mirror lamp/switch
Lf door ajar input
Liftgate disable/ajar
Liftgate wiper disable switch (w/ power equipment group)
Lr door ajar input
Map lamp
Nca
Norm
Off
Rear dome lamp
Rear map lamp
Relay module (behind center of dash)
Rf door ajar input
Right front door ajar switch
Right front door courtesy lamp
Right liftgate ajar switch
Right rear door ajar switch
Right vanity mirror lamp/switch
Rr door ajar input
S203
S234 (near breakout to driver's seat belt buckle)
S302
S322 (near left kick panel)
S404
S409 (near left rear door ajar switch breakout)
S500
S602
W/o overhead console only

Instrument Illumination Wiring Diagram (1 of 2) for Mercury Mountaineer 1998

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List of elements for Instrument Illumination Wiring Diagram (1 of 2) for Mercury Mountaineer 1998:

(2-door) (4-door)
(3)
(4-door) (2-door)
(near left front door courtesy lamp breakout) s501
(near left kick panel) s267
4wd mode switch
Anti-theft system
Ashtray illum- ination
C276
C280
C286
C287
C297
C298
Central timer module (ctm)/ generic electronic module (gem) (behind center of dash)
Clock spring
Day/night mirror/ autolamp sensor
Electronic automatic temperature control (eatc) module
Exterior lights system
Fog lamp switch
Front panel illumination
Fuse 11 15a
G104 (rear of
G108 (left radiator support)
G500 (in left front door)
G700 (in left rear door)
G800 (in right front door)
G800 (in right rear door)
Gnd
Head
Headlamp relay
Headlamp switch
Heated rear window switch
Heater-a/c control assembly illumination
Hot at all times
Illumination
Illumination (2)
Instrument cluster
Left front fender)
Left front power door lock switch (2-door)
Left front power window switch
Left rear power window switch
Liftgate wiper/ washer switch
Master window/ * door lock control switch (4-door)
Motor) s601
Nca
Off
Park
Park lamp relay
Power distribution box
Red/ (behind right side of dash) s306
Relay ctrl
Relay module (behind center of dash)
Right front power door lock switch
Right front power window switch
Right rear power window switch
S200
S229
S232
S244 (near breakout to relay module)
S264 (near instrument cluster breakout)
S500
S602
S700
S800
Speed control/ horn switch assembly
W/ autolamps
W/ eatc
W/o eatc
W/o high series console

Instrument Illumination Wiring Diagram (2 of 2) for Mercury Mountaineer 1998

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List of elements for Instrument Illumination Wiring Diagram (2 of 2) for Mercury Mountaineer 1998:

(at left kick panel) s261
(near instrument cluster breakout) s228
(premium)
(standard)
Battery saver relay
C2003
C2008
C2009
C228
C256
C283
C286
C297
Central timer module (ctm)/ generic electronic module (gem) (behind center of dash)
Courtesy lamps circuit
Dimmer module (left side of steering column)
Dimmer relay
Dimming indicators (power)
Electronic automatic temperature control (eatc) module
Fuse 11 7.5a
Fuse 26 10a
G104 (rear of
G108 (left radiator support)
G500 (in left front door)
G901 (right "a" pillar)
Gnd
Head
Headlamp relay
Headlamp switch
Hot at all times
Hot in run or start
I/p fuse panel
Instrument cluster
Instrument illumination
Left front fender)
Left power/ heated mirror
Message center
Message center switch assembly
Nca
Norm
Off
Park
Radio or front control unit
Rear integrated control panel (ricp)
Relay module (behind center of dash)
Right power/ heated mirror
S200
S205
S208 (near breakout to headlamp switch)
S213
S223
S230
S231
S500
S602
Solid state
W/ high series console only

MEMORY SYSTEMS

Memory System Wiring Diagrams for Mercury Mountaineer 1998

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List of elements for Memory System Wiring Diagrams for Mercury Mountaineer 1998:

(left kick panel) g200
(left radiator support) g108
C335
C337
C338
C350
C351
C353
C359
Central junction box (behind left side of dash)
Data link connector (dlc) (behind left side of dash)
Driver seat module (dsm) (below left front seat)
Entire seat
F tilt down motor
Front height motor
Front of seat
Front tilt mtr up
Front tilt sense
Fuse 25a
Fuse 7.5a
Fwd
Fwd/ rwd motor
Gnd
Hall effect sensor
Headlights & power mirrors systems
Horiz mtr
Horiz rearward motor
Horiz sense
Hot at all times
Hot in start
Ignition
Iso link
Lamp drive
Left front power seat control switch
Left front seat motor assembly
Left power lumbar seat switch
Logic gnd
Logic power
Mem 1
Mem 2
Memory seat sw posit 1
Memory seat sw posit 2
Memory seat sw set
Memory seat switch
Nca
Power
Power antenna system
R tilt down motor
Rear height motor
Rear of seat
Rear tilt mtr up
Rear tilt sense
Remote anti-theft/ personality (rap) module (at left rear quarter panel)
Rwd
S209
S234
S235
S265
S282
S303
S304 (in main branch to breakout for liftgate washer pump motor)
S321
Seat position sensor (+)
Seat position sensor (-)
Seat reg sw rear tilt dn
Seat reg sw rear tilt up
Seat reg sw to dn mtr
Seat reg sw to up mtr
Seat sw horiz rwd mtr
Seat sw horiz. fwd mtr
Set

POWER ANTENNA

Power Antenna Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Power Antenna Wiring Diagram for Mercury Mountaineer 1998:

C228
Fuse 7.5a mini
G104 (rear of left front fender)
Hot at all times
Junction fuse panel (left side of vehicle, below dash)
Mirrors system
Nca
Power antenna module/motor (right front of vehicle)
Radio
S229
S282
Solid state

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 4) for Mercury Mountaineer 1998

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List of elements for Power Distribution Wiring Diagram (1 of 4) for Mercury Mountaineer 1998:

(left side of dash) s237
(right corner of dash) s239
4wabs control module
A/c relay
Accy delay relay
Air bag diagnostic monitor
Automatic ride control on/off switch
Automatic ride control relay
Auxiliary relay box no 1 (left side of engine compartment)
Battery
Blower motor relay
Daytime running lamps module
Dimmer relay
Fog lamp relay
From b fuse 3 (diagram 1 of 4)
From fuse 1 (diagram 1 of 4)
Fuel pump relay
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 30a
Generator/ voltage regulator
Headlamp relay
Headlamp switch
Horn relay
Ignition switch
Maxi fuse 20a
Maxi fuse 30a
Maxi fuse 40a
Maxi fuse 50a
Mega fuse 175a
Moonroof motor
Multi- function switch
Nca
Park lamp relay
Pcm power relay
Power distribution box (left side of engine compartment)
Powertrain control module
Rear window defrost relay
Rear wiper down relay
Rear wiper up relay
Red
Relay module (behind center of dash)
Remote anti-theft personality module
S160 (near breakout to power distribution box)
S236 (near breakout to headlamp switch)
Starter motor
Starter motor relay
To fuse 10 (diagram 1 of 4)
To fuse 5 (diagram 2 of 4)
To fuse 8 (diagram 1 of 4)
Transfer case shift relay

Power Distribution Wiring Diagram (2 of 4) for Mercury Mountaineer 1998

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List of elements for Power Distribution Wiring Diagram (2 of 4) for Mercury Mountaineer 1998:

(near breakout for instrument cluster) s209
(near breakout to fuel injector 3)
(near breakout to instrument cluster) s213
(near breakout to power distribution box)
(near breakout to radio) s242
(not used)
4.0l
5.0l
Acc
Air bag diagnostic monitor
Am/fm
Auxiliary relay box no 1 (left side of engine compartment)
Brake pedal position switch
Brake pressure switch
Central timer module/ generic electronic module
Data link connector
Day/night mirror/ autolamp sensor
Dimmer relay
From c fuse 8 (diagram 1 of 4)
Front washer pump relay
Fuse 10a
Fuse 20a
Fuse 25a
Fuse 30a
Fuse 7.5a
Generic electronic module
I/p fuse panel
Ignition coil
Ignition coil 1 & 2
Ignition coil 3 & 4
Ignition switch
Instrument cluster
Liftgate wiper/ washer switch
Lock
Lux
Maxi fuse 50a
Maxi fuse 60a
Memory seat switch
Mobile telephone transceiver
Nca
Off
Passive anti-theft system module
Pcm power diode
Pcm power relay
Power antenna module
Power distribution box (left side of engine compartment)
Power mirror switch
Premium sound
Radio
Radio noise capacitor
Radio or front control unit
Red
Relay module
Remote anti-theft personality module
Run
S118
S163
S164 (near breakout for power distribution box)
S245 (near breakout to instrument cluster)
S265 (left side of dash)
Sta
Start
Starter motor relay
To fuse 10 (diagram 4 of 4)
To fuse 21 (diagram 3 of 4)
To fuse 24 (diagram 3 of 4)
To fuse 27 (diagram 3 of 4)
Wiper hi-lo relay
Wiper motor
Wiper run relay

Power Distribution Wiring Diagram (3 of 4) for Mercury Mountaineer 1998

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List of elements for Power Distribution Wiring Diagram (3 of 4) for Mercury Mountaineer 1998:

(in breakout to liftgate washer pump motor)
(left rear of engine compartment) s120
(near breakout to cd changer) s243
(near breakout to headlamp switch) s207
(near brekout to instrument cluster) s284
2dr
4dr
A/t
Amplifier (premium sound)
Backup lamp switch
Cd changer
Cigar lighter
Clutch pedal position switch
Clutch pedal position switch jumper
Daytime running lamps module
Digital transmission range sensor
Door lock relay
Door unlock relay
Driver's door unlock relay
From d fuse 25 (diagram 2 of 4)
From ignition switch a2 (diagram 2 of 4)
From ignition switch sta (diagram 2 of 4)
Fuse 10a
Fuse 15a
Fuse 25a
Fuse 7.5a
G104 (left rear of engine compartment)
Generic electronic module
I/p fuse panel
Left front power seat control switch
Left power lumbar seat switch
M/t
Memory seat module
Nca
Pnk
Power antenna module
Premium sound radio
Radio or front control unit
Rear integrated control panel
Rear window defrost relay
Right front power seat control switch
Right power lumbar seat switch
S200
S282 (near breakout to instrument cluster)
S303
Subwoofer amplifier
To fuse 26 (diagram 4 of 4)
Transmission control switch
Turn/ hazard flasher
W/ electronics group only
W/ high series console
W/ lux/jbl and radio
W/ memory seat
W/ premium sound
W/o high series console
W/o memory seat

Power Distribution Wiring Diagram (4 of 4) for Mercury Mountaineer 1998

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List of elements for Power Distribution Wiring Diagram (4 of 4) for Mercury Mountaineer 1998:

(near breakout to i/p fuse panel) s217
(near breakout to instrument cluster) s209
(near breakout to rear blower moter relay) s210
(near breakout to relay module) s244
4wabs control module
Air bag diagnostic monitor
Automatic ride control module
Auxiliary power
Auxiliary relay box no 2 (right front of engine compartment)
Battery saver relay
Blend door actuator
Blower motor relay
Compass/ outside air temp module
Day/ night mirror/ autolamp sensor
Electronic automatic temperature control module
From fuse 18 (diagram 3 of 4)
From ignition switch a4 (diagram 2 of 4)
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 7.5a
Fuse 7.5a (w/ eatc)
Fuse 7.5a (w/o eatc)
Generic electronic module
Heater/a/c control assembly
I/p fuse panel
Lamp out warning module
Left front power seat control switch
Memory seat module
Message center
Message center relay
Mobile telephone tranceiver
Nca
Power distribution box (left side of engine compartment)
Rear blower motor
Rear blower motor relay
Rear blower relay
Rear integrated control panel
Relay module (center of dash)
Shift lock actuator
Speed control servo/ amplifier assembly
Steering rate sensor
Trailer tow park lamp relay
Turn/ hazard flasher
W/ memory seat
W/o memory seat

POWER DOOR LOCKS

Power Door Lock Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Power Door Lock Wiring Diagram for Mercury Mountaineer 1998:

(2 door) (4 door)
(in breakout to right stop/ park lamp) s305
* **
* 2 door 4 door
* 87a
2 door
4 door
Auxiliary relay box 2 (right front of engine compartment)
C280
C336
C338
Door lock relay
Door unlock relay
Driver's door unlock relay
Fuse 18 25a
G200 (left kick panel)
G500 (in left front door)
G600 (in right front door)
Generic electronic module (behind center of dash)
Hot at all times
I/p fuse panel
Left front door lock motor
Left rear door lock motor
Liftgate lock motor
Liftgate lock switch
Lock
Master window/ door lock control switch (4 door) left front power door lock switch (2 door)
Remote anti-theft personality module (w/ keyless entry only) (left rear quarter panel)
Right front door lock motor
Right front power door lock switch
Right rear door lock motor
S300 (in main branch to breakout for liftgate washer pump motor)
S302
S303
S339 (510 mm from breakout to 10 pin conn, inside left rear door jamb)
S340 (near break- out to 10 pin conn, inside left rear door jamb)
S500
S602
Unlck
Unlock
W/ electronic group
W/o electronic group

POWER MIRRORS

Photochromic Mirror Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Photochromic Mirror Wiring Diagram for Mercury Mountaineer 1998:

(body harn main branch, near breakout for liftgate washer pump motor)
(left kick panel)
A/t
Anti-theft system (remote anti-theft personality module)
Backup lamp switch (left side of transmission adapter)
Day/night mirror/ autolamp sensor (mounted in rear view mirror)
Digital transmission range sensor (left side of transmission)
Exterior lights system (backup lamps)
Exterior lights system (park lamp relay)
Fuse 15a mini
Fuse 7.5a mini
G200
Hot at all times
Hot in run
Hot in run and start
I/p fuse panel (left side of vehicle, below dash)
M/t
S162
S202
S209
S213
S307

Power Mirror Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Power Mirror Wiring Diagram for Mercury Mountaineer 1998:

Defogger system
Direct- ional control switch
Fuse 7.5a mini
G500 (in left front door)
Hot at all times
I/p fuse panel (left side of vehicle, below dash)
Interior lights system
L/r m motor
L/r motor
Left power/ heated mirror
Left/ right switch
Nca
Power antenna system
Power mirror switch
Red
Right power/ heated mirror
S265
S500
Up/dn m motor

POWER SEATS

Power & Lumbar Seat Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Power & Lumbar Seat Wiring Diagram for Mercury Mountaineer 1998:

Entire seat
Front height motor
Front of seat
Fuse 25a
Fwd/rwd motor
G200 (left kick panel)
Hot at all times
I/p fuse panel
Inflate
Left front power seat control switch
Left front seat motor assembly
Left lumbar air bladder
Left power lumbar motor
Left power lumbar seat switch
Nca
Rear height motor
Rear of seat
Red
Right front power seat control switch
Right front seat motor assembly
Right lumbar air bladder
Right power lumbar motor
Right power lumbar seat switch
Rwd fwd
S235
S301
S303
S321
Vent

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagrams for Mercury Mountaineer 1998

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List of elements for Power Top/Sunroof Wiring Diagrams for Mercury Mountaineer 1998:

(main harness, near breakout to inst cluster)
(main harness, near breakout to relay module
Accy 87a delay relay
Accy delay relay control
Battery saver relay
Battery saver relay control
C283
Fuse 4 30a maxi
Fuse 8 10a mini
G200 (left kick panel)
Generic electronic module (behind center of dash)
Hot at all times
I/p fuse panel (left side of vehicle, below dash)
Moonroof control switch (in overhead console)
Moonroof motor (center rear of roof)
Nca
One touch open/close moon roof motor
Power distribution box (left side of engine compt, at fender apron)
Red
Relay module (behind center of dash)
S202
S236
S246
S259
Slide
Solid state
Tilt

POWER WINDOWS

Power Window Wiring Diagram, 4 Door for Mercury Mountaineer 1998

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List of elements for Power Window Wiring Diagram, 4 Door for Mercury Mountaineer 1998:

(near breakout to 10 pin conn, in left rear dr jamb) s314
(near breakout to radio) s271
(near breakout to radio) s272
(near breakout to relay mod) s259
87a
Accy delay
Accy delay relay
Batt saver
Battery saver relay
C283
Current hi
Current low
Down input
Fuse 10a
G500 (in left front door)
G600 (in right front door)
G700 (in left rear door)
G800 (in right rear door)
Generic elec- tronic module (behind center of dash)
Hot at all times
I/p fuse panel (below left side of dash)
Interior lights system
Left front power window motor
Left front switch
Left rear power window motor
Left rear power window switch
Left rear switch
Master window/ door lock control switch
Maxi fuse 4 30a
Moonroof control switch
Moonroof motor (center rear of roof)
One touch dn
One touch down relay
Power distribution box (left side of engine compt, at fender apron)
Red
Relay module (behind center of dash)
Resistance wire (0.015 +/- 0.001 ohm)
Right front power window motor
Right front power window switch
Right front switch
Right rear power window motor
Right rear power window switch
Right rear switch
S236
S246 (near breakout to cluster)
S260 (near breakout to parking brake sw)
S270 (near breakout to relay module)
S500
S602
S700
S800
Transmissions system (torque on demand relay)
Up input
Window lock switch

RADIO

Base Radio, with High Series Console for Mercury Mountaineer 1998

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List of elements for Base Radio, with High Series Console for Mercury Mountaineer 1998:

(dash harn, near breakout to radio)
(dash harn, near breakout to rear blower moror
(dash harn, near breakout to rear integrated control panel)
(rear of left front fender)
(rear of left front fender) g104
Amp l rear (+)
Amp r rear (+)
Antenna
Anti-lock brakes system
Audio on
Audio system on
Audio sytem on
C2003
C228
C256
Cd changer
Cd left sig in
Cd left sig out
Cd player shield
Cd right sig in
Cd right sig out
Fuse 25a
Fuse 7.5a
Fused ignition
G104
G901 (right "a" pillar)
Ground
Hot at all times
Hot in run or acc
Hot in start
I/p fuse panel (left side of vehicle, below dash)
Illum
Illum return
Interior lights system
L front spkr (+)
L front spkr (-)
L rear sig (+)
L rear sig (-)
L rear spkr (+)
L rear spkr (-)
Left front speaker
Left rear speaker
Left sig (+)
Left sig (-)
Nca
Power
Protocol a
Protocol b
R front spkr (+)
R front spkr (-)
R rear sig (+)
R rear sig (-)
R rear spkr (+)
R rear spkr (-)
Radio
Rear integrated control panel
Right front speaker
Right rear speaker
Right sig (+)
Right sig (-)
S200
S205
S231
S243
S245
S277
S278
S279
S280
S281
S282
Shield
Tan
Vehicle speed sig

Base Radio, without High Series Console for Mercury Mountaineer 1998

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List of elements for Base Radio, without High Series Console for Mercury Mountaineer 1998:

Antenna
Anti-lock brakes system
C228
C256
Fuse 25a
Fuse 7.5a
Fused ignition
G104 (rear of left front fender)
G901 (right "a" pillar)
Ground
Hot at all times
Hot in run or acc
Hot in start
I/p fuse panel (left side of vehicle, below dash)
Illum return
Interior lights system
L front spkr (+)
L front spkr (-)
L rear spkr (+)
L rear spkr (-)
Left front speaker
Left rear speaker
Nca
Power
R front spkr (+)
R front spkr (-)
R rear spkr (+)
R rear spkr (-)
Radio
Right front speaker
Right rear speaker
S200
S245
S282
Vehicle speed

Premium Sound Radio Wiring Diagram, with High Series Console for Mercury Mountaineer 1998

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List of elements for Premium Sound Radio Wiring Diagram, with High Series Console for Mercury Mountaineer 1998:

(dash harn, near breakout to radio)
(dash harn, near breakout to rear blower motor)
(dash harn, near breakout to rear integrated control panel)
(right "a" pillar) g901
Amplifier (right rear side of vehicle)
Antenna
Audio on
C2003
C228
C256
C331
C332
Cd changer
Cd left (+)
Cd left (-)
Cd right (+)
Cd right (-)
Fuse 25a
Fuse 7.5a
Fused ignition
G104 (rear of left front fender)
G201 (under right side of dash)
G901 (right "a" pillar)
Ground
Hot at all times
Hot in run or acc
I/p fuse panel (left side of vehicle, below dash)
Iillumination
Illulminaton
Interior lights system
L front (+)
L front (-)
L front (_)
L front sig (+)
L front sig (-)
L rear (+)
L rear (-)
L rear sig (+)
L rear sig (-)
Left front speaker
Left rear speaker
Left sig (+)
Left sig (-)
Logic mute
Nca
Power (+)
Power (b+)
Protocal a
Protocal b
Protocol a
Protocol b
R front (+)
R front (-)
R front sig (+)
R front sig (-)
R rear (+)
R rear (-)
R rear sig (+)
R rear sig (-)
Radio
Rear integrated control panel
Right front speaker
Right rear speaker
Right sig (+)
Right sig (-)
S200
S205
S231
S243
S245
S277
S278
S279
S280
S281
Shield
Tan

Premium Sound Radio Wiring Diagram, with Mach Sound System for Mercury Mountaineer 1998

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List of elements for Premium Sound Radio Wiring Diagram, with Mach Sound System for Mercury Mountaineer 1998:

(dash harn, near breakout to radio)
(dash harn, near breakout to rear blower motor)
(dash harn, near breakout to rear integrated control panel)
(dash harn, near ignition switch
(rear of left front fender)
(rear of left front fender) g104
Amp l rear (+)
Amp r rear (+)
Antenna logic
Anti-lock brakes system
Audio on
Audio shield
Audio system on
Audio sytem on
Audio/ climate control switch assembly
Band
C171
C2003
C215
C228
C256
C333
C388
Cd changer
Cd left sig in
Cd left sig out
Cd player shield
Cd right sig in
Cd right sig out
Cellular phone
Cellular telephone
Clock- spring assembly
Down
Fuse 25a
Fuse 7.5a
Fused ignition
G104
G901 (right "a" pillar)
Ground
High audio mute
Hot at all times
Hot in run or acc
Hot in start
I/p fuse panel (left side of vehicle, below dash)
Illum
Illum return
Interior lights
Interior lights system
L front spkr (+)
L front spkr (-)
L rear sig (+)
L rear sig (-)
L rear spkr (+)
L rear spkr (-)
Left front speaker
Left rear speaker
Left sig (+)
Left sig (-)
Mem
Nca
Power
Power antenna
Power antenna module (on antenna mast)
Protocol a
Protocol b
R front spkr (+)
R front spkr (-)
R rear sig (+)
R rear sig (-)
R rear spkr (+)
R rear spkr (-)
Radio
Radio control
Rear integrated control panel
Right front speaker
Right rear speaker
Right sig (+)
Right sig (-)
S200
S204
S205
S229
S231
S243
S245
S277
S278
S279
S280
S281
S282
S284
S352
Shield
Speed control servo/amplifier assembly (right rear of engine compt)
Sub speaker (+)
Sub speaker (-)
Subwoofer
Subwoofer (+)
Subwoofer (-)
Subwoofer amplifier
Tan
Vehicle speed sig

Premium Sound Radio Wiring Diagram, without High Series Console for Mercury Mountaineer 1998

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List of elements for Premium Sound Radio Wiring Diagram, without High Series Console for Mercury Mountaineer 1998:

(right "a" pillar) g901
Amplifier (right rear side of vehicle)
Antenna
C228
C256
C331
C332
Fuse 25a
Fuse 7.5a
Fused ignition
G104 (rear of left front fender)
G901 (right "a" pillar)
Ground
Hot at all times
Hot in run or acc
I/p fuse panel (left side of vehicle, below dash)
Illulminaton
Interior lights system
L front (+)
L front (-)
L front (_)
L front sig (+)
L front sig (-)
L rear (+)
L rear (-)
L rear sig (+)
L rear sig (-)
Left front speaker
Left rear speaker
Logic mute
Nca
Power (b+)
R front (+)
R front (-)
R front sig (+)
R front sig (-)
R rear (+)
R rear (-)
R rear sig (+)
R rear sig (-)
Radio
Right front speaker
Right rear speaker
S200
S245
Shield

SHIFT INTERLOCKS

Shift Interlock Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Shift Interlock Wiring Diagram for Mercury Mountaineer 1998:

Brake pedal position (bpp) switch (behind steering column)
C224
Fuse 10 7.5a
Fuse 9 7.5a
G104 (rear of left front fender)
Hot at all times
Hot in run
I/p fuse panel (left side of vehicle, below dash)
S230
S244
Shift lock actuator (in steering column)
Solid state

STARTING/CHARGING

Charging Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Charging Wiring Diagram for Mercury Mountaineer 1998:

4.0l only
Alt sys fuse 30a
Battery
C120
C121
C122
C288
Charge warning lamp
Fuse 7.5a
G111 (near battery)
Generator/ voltage regulator
Hot in start or run
Instru- ment cluster
Interior fuse panel
Mega fuse 175a
Nca
Ohms
Power distri- bution box
Red
Starter motor

Starting Wiring Diagram, A/T for Mercury Mountaineer 1998

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List of elements for Starting Wiring Diagram, A/T for Mercury Mountaineer 1998:

Acc
Battery
C112
C197
Clutch pedal position (ccp) switch jumper (left of dash)
Digital transmission range (dtr) sensor (left side of trans selector)
Fuse 5 50a
Fuse 7.5a
G104 (rear of left front fender)
G111 (near battery)
I/p fuse panel
Ignition switch
Lock
Off
Pnk
Power distribution box
Red
Run
S104
S164
S209
Start
Starter motor (left front of engine compt)
Starter motor relay
Tan/red
W/ hi series console
W/o hi series console

Starting Wiring Diagram, M/T for Mercury Mountaineer 1998

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List of elements for Starting Wiring Diagram, M/T for Mercury Mountaineer 1998:

Acc
Battery
C197
Clutch pedal position (ccp) switch (behind left side of dash)
Fuse 5 50a
Fuse 7.5a
G104 (rear of left front fender)
G111 (near battery)
I/p fuse panel
Ignition switch
Lock
Off
Pnk
Power distribution box
Red
Run
S104
S164
S209
Start
Starter motor (left front of engine compt)
Starter motor relay
Tan/red

SUPPLEMENTAL RESTRAINTS

Supplemental Restraint Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Supplemental Restraint Wiring Diagram for Mercury Mountaineer 1998:

when module
(dash harn, near relay module breakout)
(near s232 breakout to rear window defrost relay)
* pin shorting bar is engaged
Air bag clock- spring assembly
Air bag diagnostic monitor (behind right side of dash)
Air bag ind
Air bag indicator
C232
C233
C288
C291
Connector is disconnected
Data link con
Data link connector (dlc) (behind left side of dash)
Driver air bag
Fuse 5 10a mini
Fuse 7.5a mini
G108 (left radiator support)
Ground
Hot at all times
Hot in run
Hot in run and start
I/p fuse panel (left side of vehicle, below dash)
Ignition
Ignition (run)
Instrument cluster
L crash sens
Left primary crash sensor (left front of engine compartment)
Nca
Pass air bag
Passenger air bag
Power (bat)
Power distribution box (left side of engine compt, at fender apron)
R crash sens
Red
Right primary crash sensor (right front of engine compartment)
S239
S255
Shorting bar

TRANSMISSION

4.0L

4.0L SOHC, Transmission Wiring Diagram, 5R55E for Mercury Mountaineer 1998

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List of elements for 4.0L SOHC, Transmission Wiring Diagram, 5R55E for Mercury Mountaineer 1998:

(in breakout for pcm)
(left radiator support) g108
(near breakout to 16-pin conn at rear of eng compt)
(near breakout to 4wabs module)
(near breakout to fuel injector 6)
(not used)
(right kick panel)
4wabs module (left side of eng compt)
5r55e automatic transmission
A/c system
Air condi- tioning & engine controls systems
Anti-lock brakes system
Back-up lamp switch, drl module, rear window defog relay
Battery junction box
Brake pedal position switch
C172
C286
C287
Canister vent solenoid
Data link connector (partial) (left side of dash)
Day/night mirror
Digital transmission range sensor (left side of transmission)
Dimmer relay & instrument cluster
Electronic pressure control solenoid
Engine controls system
Engine controls system (ignition)
Engine coolant temperature sensor (front of engine left of throttle body)
Fuse 10a
Fuse 15a
Fuse 25a
Fuse 7.5a
Fuse junction panel (left side of dash)
G104 (rear of left front fender)
G108 (left radiator support)
G203
Hot at all times
Hot in run
Hot in run or start
Instrument cluster
Instrument cluster system (headlamp switch)
Malfunction indicator lamp (check engine)
Maxi fuse 30a
O/d off indicator lamp (tcil)
Output shaft speed sensor (on transmission)
Passive anti-theft system module
Pcm power relay
Pcm power relay diode
Powertrain control module (through firewall)
R p
Rear axle sensor
Red
Red/pnk
S101
S105
S123 (135 mm from branch to fuel pump relay)
S136 (405 mm from bmap sensor breakout)
S137
S142 (100 mm from breakout to 4-pin conn at righ rear of eng)
S146
S147 (near breakout to auxiliary relay box 3)
S166
S167 (near breakout to fuel injector 6)
S168
S179
S180
S205
S206
S213
S215 (near breakout to ignition switch)
S230
Sens hi
Sens lo
Shift solenoid
Throttle postion sensor
Torque converter clutch solenoid
Transmission control switch
Transmission fluid temperature sensor
Turbine shaft speed sensor
Vs out

Electronic Transfer Case Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Electronic Transfer Case Wiring Diagram for Mercury Mountaineer 1998:

(440 mm from electronic shift motor transfer case)
(behind center of dash) relay module
(in break out to gem) s250
(left side of automatic transmission)
(near break out to instrument cluster) s248
(near break out to relay module)
(near breakout for instrument cluster)
(near breakout to instrument cluster) s247
(near breakout to radio)
(near electronic transfer case)
1.1k ohms
3.9k ohms
4.0l
4wabs control module (left side of eng compt)
4wd mode switch
4x4 high range ind
4x4 low range ind
4x4 low range ind c202
87a
A/t
Accy delay relay
Anti-lock brakes
Battery junction box
Battery saver relay
Brake pedal position switch
C280
C282
C283
C286
Courtesy lamps (interior lights system)
Digital transmission range sensor (dtr)
Electronic shift control module (behind center of dash)
Electronic shift motor transfer case
Front speed sensor
Fuse 10a
Fuse 7.5a
Fuse junction panel (left side of dash)
G104 (rear of left front fender)
G203 (right kick panel)
Generic electronic module (behind center of dash)
H2l
Hot at all times
Hot in start
Illumination lamp
Instrument cluster
Interior lights system (instrument illumination circuit)
L2h
Liftgate wiper/ washer switch, multi-function switch
M/t
Magnetic clutch coil
Maxi fuse 20a
Maxi fuse 30a
Memory seat module
Mode
Moonroof motor
Ohms
Power tops & power windows systems
Powertrain control module (mounted on firewall)
Rear speed sensor
S108
S200
S215 (near breakout to ignition switch)
S236
S246
S249
S251
S252
S259
Shift motor
Solid state
Torque on demand relay (right side of dash)
Vss out

5.0L

5.0L, Transmission Wiring Diagram, 4R70W for Mercury Mountaineer 1998

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List of elements for 5.0L, Transmission Wiring Diagram, 4R70W for Mercury Mountaineer 1998:

(100 mm from breakout to throttle position sensor)
(135 mm from breakout to fuel pump relay)
(left radiator support) g108
(left side of engine compt) 4 wheel anti-lock brake system (4wabs) module
(left side of transmission) digital transmission range sensor
4r70w transmission (mounted under center of vehicle)
Back-up lamps, rear window defrost relay
Battery junction box
Bpp
Brake pedal position switch (behind steering column)
C186
C202
C286
C287
Case gnd
Data
Data link connector (dlc) (partial) (behind left side of dash)
Dlc (+)
Dlc (-)
Ect
Electronic pressure control (epc) solenoid
Eng controls, a/c relay, fuel pump rly
Engine controls system
Engine coolant temperature (ect) sensor (mounted on front of engine, left of throttle body)
Epc
Fuel injectors
Fuse 10 30a
Fuse 13 15a
Fuse 19 25a
Fuse 27 15a
Fuse 6 10a
Fuse 9 7.5a
Fuse junction panel (left side of dash)
G108 (left radiator support)
G203 (right side of dash)
Hot at all times
Hot in run
Hot in start or run
Ignition coils, radio noise capacitor
Instrument cluster
Kapwr
Malfunction indicator lamp (mil) (check engine)
Mil
Od off
Oss
Output shaft speed sensor (left rear of transmission)
Passive anti-theft module
Pcm power diode
Pcm power relay
Powertrain control module (pcm) (mounted through firewall)
Pwr gnd
R p
Rear axle speed sensor (on axle assembly)
Red
S101 (in breakout for powertrain control module)
S105
S123
S137
S142 (right rear of engine)
S146
S166 (near breakout to fuel inj 6)
S168 (near breakout to 4wabs mod)
S206 (near breakout to ground g201, near battery)
S207
S215 (near breakout to ignition switch)
Shift solenoids (ss)
Sig rtn
Ss1
Ss2
Tcc
Tcil
Tcs
Tft
Throttle position (tp) sensor (attached to throttle body)
Torque converter clutch (tcc) solenoid
Tr1
Tr2
Tr3
Transmission control indicator lamp (tcil)
Transmission control switch (tcs)
Transmission fluid temperature sensor
Vpwr
Vref
Vss

Electronic Transfer Case Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Electronic Transfer Case Wiring Diagram for Mercury Mountaineer 1998:

(440 mm from electronic shift motor transfer case)
(behind center of dash) relay module
(in break out to gem) s250
(left side of automatic transmission)
(near break out to instrument cluster) s248
(near break out to relay module)
(near breakout for instrument cluster)
(near breakout to instrument cluster) s247
(near breakout to radio)
(near electronic transfer case)
1.1k ohms
3.9k ohms
4.0l
4wabs control module (left side of eng compt)
4wd mode switch
4x4 high range ind
4x4 low range ind
4x4 low range ind c202
87a
A/t
Accy delay relay
Anti-lock brakes
Battery junction box
Battery saver relay
Brake pedal position switch
C280
C282
C283
C286
Courtesy lamps (interior lights system)
Digital transmission range sensor (dtr)
Electronic shift control module (behind center of dash)
Electronic shift motor transfer case
Front speed sensor
Fuse 10a
Fuse 7.5a
Fuse junction panel (left side of dash)
G104 (rear of left front fender)
G203 (right kick panel)
Generic electronic module (behind center of dash)
H2l
Hot at all times
Hot in start
Illumination lamp
Instrument cluster
Interior lights system (instrument illumination circuit)
L2h
Liftgate wiper/ washer switch, multi-function switch
M/t
Magnetic clutch coil
Maxi fuse 20a
Maxi fuse 30a
Memory seat module
Mode
Moonroof motor
Ohms
Power tops & power windows systems
Powertrain control module (mounted on firewall)
Rear speed sensor
S108
S200
S215 (near breakout to ignition switch)
S236
S246
S249
S251
S252
S259
Shift motor
Solid state
Torque on demand relay (right side of dash)
Vss out

WARNING SYSTEMS

Warning System Wiring Diagrams for Mercury Mountaineer 1998

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List of elements for Warning System Wiring Diagrams for Mercury Mountaineer 1998:

(body harn, near breakout to rear defogger)
(front of left rear quarter panel)
(front of left rear quarter panel) g414
(top center of liftgate) g412
Battery
C280
C283
C288
Central timer module (ctm)/ generic electronic module (gem) (behind center of dash)
Fuse 7.5a
G200 (left kick panel)
G414
Head
Headlamp switch
Hot at all times
Hot in run
Hot in run or acc
Hot in start
I/p fuse panel (left side of vehicle, below dash)
Instrument cluster
Key in ign
Key warning switch (inside steering column)
Left front door ajar switch
Left liftgate ajar switch (left side of liftgate)
Left rear door ajar switch
Lf door ajar
Liftgate in
Liftgate wiper disable switch
Lr door ajar
Off
Park
Park lamp relay (in relay module)
Park/head in
Rf door ajar
Right front door ajar switch
Right liftgate ajar switch (right side of liftgate)
Right rear door ajar switch
Rr door ajar
S235
S242
S244
S245
S282
S404
S405
Seat belt
Seat belt ind
Seat belt warning switch (in seat belt buckle)
W/ rear integrated wipe/wash/defrost
W/o rear integrated wipe/wash/defrost

WIPER/WASHER

Front Wiper/Washer Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Front Wiper/Washer Wiring Diagram for Mercury Mountaineer 1998:

(left side of vehicle, below dash)
(near breakout to left rear corner of engine compt) s107
(rear of left front fender) g104
103k ohms
11.3k
3.3k ohms
4.08k
Body computer system
Brake/run relay
C210
C280
Central timer module/ generic electronic module (behind center of dash)
Front washer pump relay (auxiliary relay box 1)
Fuse 12 7.5a
Fuse 16 30a
G105 (rear of right front fender)
Hot in acc or run
I/p fuse panel
Int max
Int min
Interval delay/wash
Liftgate wiper/ washer switch
Multi- function switch
Off
Off 47.6k ohms
Ohms
Park
Park sense
Power distri- bution box (left side of engine compt)
Rear washer control relay (rear wiper/ washer ckt)
Red
Run
S104
S163
S250 (in breakout to gem)
Signal return
Tan/ red
Tan/red
Washer pump
Washer pump motor
Washer switch
Wiper hi-lo relay
Wiper mode select
Wiper motor
Wiper run relay
Wiper speed
Wiper switch

Rear Wiper/Washer Wiring Diagram for Mercury Mountaineer 1998

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List of elements for Rear Wiper/Washer Wiring Diagram for Mercury Mountaineer 1998:

(near breakout to left liftgate ajar switch) s405
110k ohms
9.1k ohms
Auxiliary relay box 1 (left side of engine compt)
Body computer system
C280
C281
Front washer pump relay
Fuse 15a
Fuse 7.5a
G104 (rear of left front fender)
G105 (rear of right front fender)
G414 (front of left quarter panel)
Generic electronic module (behind center of dash)
Hot at all times
Hot in acc or run
I/p fuse panel (left side of vehicle, below dash)
Illumination
Int max
Int min
Interior lights system
Left liftgate ajar switch
Liftgate disable/ajar
Liftgate wiper disable switch
Liftgate wiper motor
Liftgate wiper/ washer switch
Nca
Off
Power distribution box (left side of engine compt)
Rear washer control relay
Rear wiper down relay
Rear wiper mode select
Rear wiper park sense
Rear wiper up relay
Right liftgate ajar switch
S104
S161
S229
S250 (in breakout to gem)
S404
Signal return
Starter motor relay
Tan
W/ integrated wipe/wash/ defrost
W/o integrated wipe/wash/ defrost
Washer pump motor
Washer switch