All Wiring Diagrams for Buick Regal LS 1998 model

AIR CONDITIONING

A/C Wiring Diagram, Auto A/C (1 of 2) for Buick Regal LS 1998

List of elements for A/C Wiring Diagram, Auto A/C (1 of 2) for Buick Regal LS 1998:

(i/p harn, 34 cm from heater-a/c control breakout)
(i/p harn, 4 cm from radio breakout)
(i/p harness, 18 cm from radio breakout)
(i/p harness, 4 cm from breakout to radio)
(right side of dash) g201
(right side of steering column) sp205
+5 v
A/c sol ctrl
A/c solenoid
Ambient outside temperature sensor (behind front panel, mounted to radiator air baffle)
Battery
Bi-lev sol ctrl
Bi-level solenoid
Blower motor
Blower motor control module (behind dash, right of heater-a/c control)
C 1995 vftc
C10
C11
C12
C13
C14
C15
C16
Cntrl in
D10
D11
D12
D13
D14
D15
D16
Data link connector (under left side of dash, right of steering column)
Def sol ctrl
Defrost solenoid
Fuse block
G201 (right side of dash)
Grd
Ground
Heater solenoid
Heater-a/c control
High blower fuse 25a
Hot at all times
Hot in run
Htr sol ctrl
Hvac fuse 10a
Ignition
Inside air temperature sensor (right side of instrument cluster)
Inside temp input
Left electric actuator (left side of heater- a/c module)
Lt elec actuator
Motor drive
Nca
Outside temp input
Radio,hvac fuse 10a
Rear defog enable
Rear defogger system
Recirc sol ctrl
Recirc solenoid
Red
Right electric actuator (right side of heater- a/c module)
Rt elec actuator
S202 (i/p harness, right of steering column)
S230
S231
S233
S258
Sensor ground
Serial data
Solid state
Spd cntrl
Sun load input
Sun load temperature sensor (top left of dash)
Tan
Vacuum/ electric solenoid (on right side of heater-a/c module)
Volt to blw ctrl

A/C Wiring Diagram, Auto A/C (2 of 2) for Buick Regal LS 1998

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List of elements for A/C Wiring Diagram, Auto A/C (2 of 2) for Buick Regal LS 1998:

(engine harn, 13 cm from engine coolant fan 1 breakout)
(engine harn, 15 cm from pcm breakout) s122
(engine harness)
5 volts ref
A/c clu diode
A/c clu fuse 10a
A/c clu relay
A/c compressor clutch
A/c refrigerant pressure sensor (left side of engine compt, on accumulator)
A10
A11
C 1995 vftc
C11
Comp ctrl
Cool fan 1 maxi fuse 40a
Cool fan 1 relay
Cool fan 2 maxi fuse 30a
Cool fan 2 relay
Cool fan 3 relay
Engine controls system
Engine coolant fan motor 1
Engine coolant fan motor 2
F12
G110 (left front of engine)
Hi spd ctrl
Hot at all times
Ign main relay (closed in run, bulb test or start)
Low spd ctrl
Powertrain control module (left front side of engine compt, in air cleaner assembly)
S105
S105 (engine harn, 13 cm from engine coolant fan 1 breakout)
S167
Sensor grd
Sensor sig
Serial data
Underhood accessory wiring junction block

A/C Wiring Diagram, Manual A/C for Buick Regal LS 1998

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List of elements for A/C Wiring Diagram, Manual A/C for Buick Regal LS 1998:

(eng harn, 15 cm from pcm breakout)
(eng harness)
(engine harn, 13 cm from engine coolant fan 1 breakout)
(i/p harn, 4 cm from radio breakout)
(i/p harness, 18 cm from radio breakout)
5 volts ref
A/c compressor clutch
A/c clu diode
A/c clu fuse 10a
A/c clu relay
A/c refrigerant pressure sensor (left side of eng compt, on accumulator)
A/c request sig
A10
A11
Blower motor
Blower motor relay
Blower motor resistor
Blower sw out
C11
Clutch req
Comp ctrl
Cool fan 1 maxi fuse 40a
Cool fan 1 relay
Cool fan 2 maxi fuse 30a
Cool fan 2 relay
Cool fan 3 relay
Defogger on
Defogger system
Engine controls system
Engine coolant fan motor 1
Engine coolant fan motor 2
F12
Fuse block
G110 (left front of engine)
G201 (right side of dash)
Ground
Heater-a/c control
Hi spd ctrl
High blower fuse 20a
Hot at all times
Hot in run
Hvac fuse 10a
Ign main relay (closed in run, bulb test or start)
Ignition
Interior lights
Interior lights system
Lamp dim sig
Left electronic actuator (left side of heater- a/c module)
Left temp vlv
Low blower fuse 20a
Low spd ctrl
Nca
Off
Powertrain control module (left front side of engine compt, in air cleaner assembly)
Right electronic actuator (w/ cj3) (right side of heater- a/c module)
Right temp vlv
S105
S105 (engine harn, 13 cm from engine coolant fan 1 breakout)
S122
S167
S230
S233
Sensor grd
Sensor sig
Tan
Underhood accessory wiring junction block

Compressor Wiring Diagram for Buick Regal LS 1998

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List of elements for Compressor Wiring Diagram for Buick Regal LS 1998:

(auto a/c)
(eng harn)
(eng harn, 15 cm from pcm breakout)
(manual a/c)
(manual a/c) c2
5v ref
A/c clu diode
A/c clu fuse 10a
A/c clu relay
A/c compressor clutch
A/c compressor relay control
A/c refrigerant pressure sensor (left side of engine compt, on accumulator)
A/c reqest
A/c request signal
Breakout)
C11
D12 (auto a/c)
Engine controls system
Fuse block
G110 (left front of engine)
Heater- a/c control
Hot at all times
Hot in run
Hot in run, bulb test or start
Hvac fuse 10a
Ign main relay
Ignition
Pcm-bcm fuse 10a
Pnk
Powertrain control module (left front side of eng compt, in air cleaner assembly)
S106 (engine harn, 7 cm from pcm breakout)
S122
S167
S233 (i/p harn, 4 cm from radio breakout)
Sens grd
Sens sig
Serial data
Sp205 (right side of steering column)
Underhood accessory wiring junction block

ANTI-LOCK BRAKES

Anti-lock Brake Wiring Diagrams for Buick Regal LS 1998

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List of elements for Anti-lock Brake Wiring Diagrams for Buick Regal LS 1998:

(below dash, left of steering column)
(left of steering column) g202
A10
A11
A12
Abs fuse 10a
Abs-bcm fuse 10a
Anti lock fail
B10
B11
B12
Batt
Brake
Brake in
Brake level in
Brake modulator (left side of engine compt)
Brake motor
C1 stop lamp switch (brake pedal support bracket)
Cluster fuse 10a
Data line
Electronic brake control relay (below left side of dash)
Electronic brake traction control module (left side of dash)
Electronic power steering system
Electronic traction control brake pressure modulator valve (right rear of engine compt)
Electronic traction control switch
Enable rly output
Ets mode sw
Fuse block
G202
Ground
Hot at all times
Hot in run or start
Ign
Instrument cluster
Interior lights system
L fnt mtr-hi
L fnt mtr-lo
Left fnt wheel spd
Left front abs solenoid
Left front motor
Left front tcs motor
Left front wheel speed sensor
Left rear wheel spd
Left rear wheel speed sensor
Left solenoid
Low trac
Lt frt tcs hi
Lt frt tcs low
Msva high
Msva low
Nca
Pnk
Powertrain control module (front left side of engine)
Pressure ind
Rear motor
Rear mtr-hi
Rear mtr-lo
Red
Right front abs solenoid
Right front motor
Right front tcs motor
Right front wheel speed sensor
Right rear wheel speed sensor
Rly coil ctrl
Rt fnt mtr-hi
Rt fnt mtr-lo
Rt fnt solenoid
Rt fnt wheel spd
Rt frt tcs hi
Rt frt tcs low
Rt rear wheel spd
S205 (i/p harn, right of steering column)
S211
S279 (i/p harn, right of steering column)
S286 (i/p harn, right of steering column)
S287
Solid state
Splice pack (sp205) (right side of steering column)
Stop lamps fuse 15a
Tan
Torque from pcm
Torque to pcm
Trac off
Warning system

ANTI-THEFT

Anti-theft Wiring Diagram for Buick Regal LS 1998

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List of elements for Anti-theft Wiring Diagram for Buick Regal LS 1998:

(in air cleaner assembly) powertrain control module
5v ref
Abs bcm fuse 10a
B12
Bat
Bcm grd
Body control module (behind left side of dash, left of steering column)
Cluster fuse 10a
Crank maxi fuse 40a
Crank relay
Crank sig
Crank signal fuse 10a
Data link connector (dlc) (under left side of dash)
F10
Fuse block
G202 (below dash, right side of steering column)
Hot at all times
Hot in off, run or start
Hot in run, bulb test or start
Hot in start
Ign
Ign 0
Ign 0 fuse 10a
Ign ref lo
Instrument cluster
Key
Nca
Pcm- bcm fuse 10a
Pnk
Resistor pellet
S211
S270
Security indicator
Serial data
Splice pack s205 (below dash, right side of steering column)
Starter enable
Starter solenoid
Steering column lock & ignition key cylinder
Transaxle range switch (on transaxle)
Underhood electrical center (mounted on right strut tower)

BODY COMPUTER

Body Computer Wiring Diagrams for Buick Regal LS 1998

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List of elements for Body Computer Wiring Diagrams for Buick Regal LS 1998:

(below dash, right side of steering column)
A10
A11
A12
Abs bcm fuse 10a
Accessory
Accessory time delay (rap) relay (behind right side of dash, mounted to underside of cross car beam)
All door locks
Anti-theft system
B10
B11
B12
Bcm (battery)
Bcm (ground)
Bcm fuse 10a
Body control module (bcm) (behind left side of dash, left of steering column)
C10
C11
C12
C13
C14
C15
C16
Computer data lines system
Courtesy light on (battery)
Courtesy lights (battery)
Crank
Crank signal fuse 10a
D10
D11
D12
D13
D14
D15
D16
Door ajar (battery)
Door lock switch (lock)
Door lock switch (unlock)
Door locks (battery)
Door locks fuse 20a
Door locks system
Doors (ground)
Driver door ajar (battery)
Driver door unlock
Drl link
Exterior lights system
Fog light control (ground)
Fuse block (right side of dash)
G202
Headlights system
Horn (ground)
Horns system
Hot at all times
Hot in accy or run
Hot in off, run or start
Hot in run, bulb test or start
Hot in start
Ign 0 fuse 10a
Ignition 0
Ignition 1
Ignition 1 park brake
Ignition 1 performance
Ignition key read (5v)
Ignition ref low (ground)
Inadv power bus fuse 15a
Interior lights system
Key in ignition
Keyless entry link
Nca
Park light off (ground)
Passenger doors unlock
Pcm- bcm fuse 10a
Performance shift switch
Pnk
Rap relay drive (ground)
S211
S234
S269
S270
S283
Seat belt switch (ign 1)
Serial data (class 2)
Tan
Theater dimming (ground)
Theater dimming 1
Theater dimming 2
Trunk ajar
Underhood accessory wiring junction block
W/ rap
Warning system

COMPUTER DATA LINES

Computer Data Lines for Buick Regal LS 1998

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List of elements for Computer Data Lines for Buick Regal LS 1998:

Body control module (behind left side of dash, left of steering column)
Buick
D12
Data clss 2
Data link connector (under left side of dash, right of steering column)
E & c serial data
E1 e & c serial data
Electronic brake control module (below left side of dash, left of steering column)
Fuse block
G201 (behind right side of dash)
G202 (below dash, right side of steering column)
Hot at all times
Htr-a/c control
Inflatable restraint sensing & diagnostic module (below carpet, under right front seat)
Instrument cluster
Olds
Powertrain control module (left front side of engine compt, in air cleaner assembly)
Radio
Radio- hvac fuse 15a
Remote cd player
S202
S211
S225 (dash harn, center of dash, 27cm from radio connector)
S230
Splice pack sp205 (below dash, right of steering column)
Tan
Uart data

COOLING FAN

Cooling Fan Wiring Diagram for Buick Regal LS 1998

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List of elements for Cooling Fan Wiring Diagram for Buick Regal LS 1998:

A10
A11
All times
C11
Cool fan 2 maxi fuse 30a
Cool fan 1 maxi fuse 40a
Cool fan 1 relay
Cool fan 2 relay
Cool fan 3 relay
Engine coolant fan motor 1
Engine coolant fan motor 2
F12
G110 (left front of engine)
Hi spd ctrl
Hot at
Low spd ctrl
Powertrain control module (left front side of engine compt, in air cleaner assembly)
S105 (engine harn, 13 cm from engine coolant fan 1 breakout)
Underhood accessory wiring junction block

CRUISE CONTROL

Cruise Control Wiring Diagram for Buick Regal LS 1998

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List of elements for Cruise Control Wiring Diagram for Buick Regal LS 1998:

(front of left strut tower)
(i/p harn, near steering column)
(i/p harn, right of steering column)
All times
C12
Cruise control module
Cruise control release switch (left side of dash)
Cruise control switch
Cruise fuse 10a
Cruise inhibit
Cruise inhibit input
Cruise on input
Cruise status
D12
Disengage input
Fuse block
G202 (below dash, left of steering column)
Ground
Hot at
Hot in run, bulb
Ignition
Off
Powertrain control module (pcm) (front left side of engine compt)
R/a
Resume/accel input
S205
S240
S281
S283
Set sw
Set/coast input
Stop lamp switch (brake pedal support bracket)
Stop lamps fuse 15a
Test or start
Underhood accessory wiring junction block
Vehicle speed input
Vehicle speed sensor (vss) (lower right of engine, on transaxle)
Vss out
Vss return
Vss signal

DEFOGGERS

Defogger Wiring Diagram for Buick Regal LS 1998

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List of elements for Defogger Wiring Diagram for Buick Regal LS 1998:

(behind right side of dash) g201
(left front door sill) g309
(left front side of trunk) g400
C1 (cj2) (c60/cj3)
D nca
Heated mirror fuse 10a
Heater & a/c control
Hot at all times
Hot in run
Hvac fuse 10a
I/p fuse block
Left outside rearview mirror
Mirror defogger
Nca
On ind
On/off momentary defogger switch
Radio noise suppressor wire (in right "c" pillar)
Rear window defogger
Rear window defogger relay (behind right side of dash)
Right outside rearview mirror
Rr defog circuit breaker 30a
S230
S233
S268 (i/p harn, near blwr motor) nca
S504
S604
Solid state timer
Under driver's seat)

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Buick Regal LS 1998

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List of elements for Electronic Power Steering Wiring Diagram for Buick Regal LS 1998:

(below dash, left side of steering column) (buick) g202 (oldsmobile) g204 (left side of steering column)
(i/p wiring harness, left side of dash, approximately 1 cm from electronic brake control module/electronic brake traction control control module (ebcm/ebtcm) breakout) s279 (oldsmobile) s279 (buick) (i/p wiring harness, right side of steering column, approximately 13 cm from g202 breakout)
1995 vftc c
A11
Abs bcm fuse 10a
Abs fuse 10a
B12
Battery
Computer data lines system
Data
Data link connector (dlc) (under left side of dash, right of steering column)
Electronic brake control module/ electronic brake traction control module (ebcm/ebtcm) (below left side of dash, left of steering column)
Electronic brake control relay (below left side of dash, mounted to multi-purpose bracket)
Engine controls system
Fuse block (behind right side of dash, in right door opening)
Ground
Hot at all times
Hot in run, bulb test or start
Ignition
Msva actuator (left rear of engine compartment behind transaxle)
Msva high
Msva lo
Nca
Pnk
Red
Rly ctrl
S287
Spliced pack sp205 (below dash taped in harness, on right side of steering column)
Steering gear
Sw bat input

ENGINE PERFORMANCE

3.8L

3.8L (VIN 1), Engine Performance Wiring Diagrams (1 of 4) for Buick Regal LS 1998

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List of elements for 3.8L (VIN 1), Engine Performance Wiring Diagrams (1 of 4) for Buick Regal LS 1998:

(ign harn, top of eng, near ign control module)
(lower left front of eng)
(not used)
(pin 10-11 not used)
(pin 14-15 not used)
(pin 21 & 23-27 not used)
(pin 40-42 not used)
(pin 49-52 not used)
(pin 66-67 not used)
(right side of eng)
1-2 ss valve control
18x ref signal
2-3 ss valve control
3x ref signal
A/t iss sensor high
A/t iss sensor low
Camshaft position sensor (front of eng, above crankshaft pulley)
Cmp signal
Cooling fans system
Crankshaft position sensor (front of eng, behind harmonic balancer)
Cruise control system
Cruise disable output
Data link connector (under left side of dash, right of steering column)
Ecm sense fuse 10a
Ect sensor signal
Egr val control (gnd)
Elek ign fuse 15a
Eng emis fuse 10a
Evap purge val drviver
F/injr fuse 15a
F/pump speed ctrl rly
Fuel inj #1 driver
Fuel inj #2 driver
Fuel inj #4 driver
Fuel inj #5 driver
Fuel inj #6 driver
Fuse block (behind right side of dash, in right door opening)
G110
G120
High speed fans control
Hos1 low
Hos2 low
Hot at all times
Hot in off, run bulb test, or start
Hot in run, bulb test or start
Iac coil b high
Iat sensor ground
Ic control
Ign 0 fuse 10a
Ignition control
Ignition control module (top front of eng)
Ignition wake up power
Knock sensor bank 1 (left side of eng, in front of starter)
Knock sensor bank 2 (right side of eng, below exhaust manifold)
Knock sensor signal #1
Knock sensor signal #2
Low speed fans control
Maf sensor signal
Map sensor signal
Pcm ground
Pnk
Pnk p
Power (battery)
Powertrain control module (left front side of eng compt, in air cleaner assembly)
Ref low
S106
S144
S145
Sensor ground
Serial data (class 2)
Spark plugs
Splice pack sp250
Tan
Tcc brake switch input
Torque requested
Tp sensor signal
Tr switch input b
Trans fluid press sw a
Underhood electrical center (mounted to right strut tower)
Vss high
Vss low
Vss output

3.8L (VIN 1), Engine Performance Wiring Diagrams (2 of 4) for Buick Regal LS 1998

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List of elements for 3.8L (VIN 1), Engine Performance Wiring Diagrams (2 of 4) for Buick Regal LS 1998:

(lower left front of eng)
Electronic brake control module/electronic brake traction control module (below left side of dash, left of steering column)
Evaporative emissions canister purge solenoid valve (top right side of eng, near center of valve cover)
Evaporative emissions canister vent solenoid valve (behind left side of rear fascia splash shield, in wheelwell)
Fuel injectors
G110
Pnk
S105
S106
S109
Stop lamp switch (on brake pedal support c2 bracket)
Tan
Transaxle range switch (left side of eng compt, on transaxle)
Underhood electrical center (mounted to right strut tower)
Vehicle speed sensor (lower right side of eng compt, on transaxle)

3.8L (VIN 1), Engine Performance Wiring Diagrams (3 of 4) for Buick Regal LS 1998

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List of elements for 3.8L (VIN 1), Engine Performance Wiring Diagrams (3 of 4) for Buick Regal LS 1998:

(body harn, under left rear seat)
(eng harn, left side of eng compt, 19 cm from transaxle cover breakout)
(eng harn, left top front of eng)
(eng harn, near air cleaner, 4 cm from pcm breakout)
(in exhaust system, rear of catalytic converter) heated oxygen sensor (ho2s) no2
(in right bank exhaust manifold) heated oxygen sensor (ho2s) no1
(lower left front of eng)
(lower left side of eng, in oil pan) engine oil level indicator switch
(on throttle body assembly) idle air control (iac) valve
(top rear of eng, part of throttle body assembly) mass air flow sensor
A tan
A/c refrigerant pressure sensor (on left side of eng compt, on accumulator)
B12
C pnk
C1 underhood electrical center (mounted to right strut tower)
D pnk
Engine coolant temperature (ect) sensor (top left side of eng, below throttle body)
Engine oil pressure indicator switch (lower right side of eng, above transaxle)
Exhaust gas recirculation valve (top rear of eng, near throttle body)
Fuel tank pressure sensor (in fuel tank)
G110
Hot test or start
Instrument cluster
Intake air temperature (iat) sensor (left rear of eng compt, in air cleaner duct)
Malfunction indicator lamp
Manifold absolute pressure sensor (top right of eng, on front of intake manifold)
Nca
Oxy sen fuse 15a
Pnk
S105
S107
S122
S167
S409
Tan
Throttle position sensor (on throttle body assembly)
Trans fuse 10a

3.8L (VIN 1), Engine Performance Wiring Diagrams (4 of 4) for Buick Regal LS 1998

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List of elements for 3.8L (VIN 1), Engine Performance Wiring Diagrams (4 of 4) for Buick Regal LS 1998:

(fuel pump prime terminal)
(lower left front of eng)
(pin 12-15 not used)
(pin 30-32 not used)
(pin 40-41 not used)
(pin 47-48 not used)
(pin 51-54 not used)
(pin 6 & 8 not used)
(pin 62 & 64-65 not used)
(pin 70-75 not used)
(right rear shelf)
(torque delivered
1-2 shift solenoid
2-3 shift solenoid
5v ref a
A/c compress clutch rly
A/c refrig press signal
A/c request signal
A/t iss solenoid
A11
Air conditioning system
Auto transaxle fluid temperature sensor
Automatic transaxle fluid pressure manual valve position switch
Bat fuel pump fuse 15a
Boost control sol driver
Cluster fuse 10a
Crank
Crank signal fuse 10a
Cruise control system
Cruise engaged input
D10
Ect sensor signal
Egr pintle position signal
Egr val ign positive volt
Eng oil level ind in
Eng oil press sensor sig
Evap can vent sol driver
F/pmp spd cont relay
Fuel inj #3 driver
Fuel level sensor
Fuel level sensor input
Fuel pump
Fuel pump relay
Fuel pump relay control
Fuel pump resistor (outside of right front frame rail)
Fuel tank
Fuel tank press signal
Fuse block (behind right side of dash, in right door opening)
G110
G313
Gen terminal f output
Gen terminal l output
Ho2s 1 signal
Ho2s 2 signal
Hot at all times
Hot in run, bulb test, or start
Hot in start
Iac coil a high
Iac coil a low
Iac coil b low
Iat sensor signal
Ign1-uh fuse 15a
Ignition positive volt (2)
Map sensor signal
Mil control
Pc sol valve high
Pc sol valve low
Pcm- bcm fuse 10a
Pnk
Powertrain control module (left front side of eng compt, in air cleaner assembly)
Ps solenoid
Red
S106
S234
Sensor ground
Starter enable control
Starting/ charging system
Supercharger bypass valve (top left of eng, above left valve cover)
Tan
Tcc release switch input
Tcc sol valve control
Tcc solenoid
Tft sensor signal
Tp sens or signal
Tr switch input a
Tr switch input c
Tr switch input d
Trans fluid press sw b
Transaxle
Underhood electrical center
Underhood electrical center (mounted to right strut tower)

3.8L (VIN K), Engine Performance Wiring Diagrams (1 of 4) for Buick Regal LS 1998

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List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (1 of 4) for Buick Regal LS 1998:

(ign harn, top of eng, near ign control module)
(lower left front of eng)
(not used)
(pin 10-11 not used)
(pin 14-15 not used)
(pin 21 & 23-27 not used)
(pin 39-42 not used)
(pin 49-52 not used)
(pin 66-67 not used)
(right side of eng)
1-2 ss valve control
18x ref signal
2-3 ss valve control
3x ref signal
A/t iss sensor high
A/t iss sensor low
Camshaft position sensor (front of eng, above crankshaft pulley)
Cmp signal
Cooling fans system
Crankshaft position sensor (front of eng, behind harmonic balancer)
Cruise control system
Cruise disable output
Data link connector (under left side of dash, right of steering column)
Ecm sense fuse 10a
Ect sensor signal
Egr pintle sensor gnd
Egr val control (gnd)
Elek ign fuse 15a
Eng emis fuse 10a
Evap purge val drviver
F/injr fuse 15a
Fuel inj #1 driver
Fuel inj #2 driver
Fuel inj #4 driver
Fuel inj #5 driver
Fuel inj #6 driver
Fuse block (behind right side of dash, in right door opening)
G110
G120
High speed fans control
Hos1 low
Hos2 low
Hot at all times
Hot in off, run bulb test, or start
Hot in run, bulb test or start
Iac coil b high
Iat sensor ground
Ic control
Ign 0 fuse 10a
Ignition control
Ignition control module (top front of eng)
Ignition wake up power
Knock sensor bank 1 (left side of eng, in front of starter)
Knock sensor bank 2 (right side of eng, below exhaust manifold)
Knock sensor signal #1
Knock sensor signal #2
Low speed fans control
Maf sensor signal
Map sensor signal
Pcm ground
Pnk
Pnk p
Power (battery)
Powertrain control module (left front side of eng compt, in air cleaner assembly)
Ref low
S106
S144
S145
Serial data (class 2)
Spark plugs
Splice pack sp250
Tan
Tcc brake switch input
Tp sensor signal
Tr switch input b
Trans fluid press sw a
Underhood electrical center (mounted to right strut tower)
Vss high
Vss low
Vss output

3.8L (VIN K), Engine Performance Wiring Diagrams (2 of 4) for Buick Regal LS 1998

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List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (2 of 4) for Buick Regal LS 1998:

(lower left front of eng)
Evaporative emissions canister purge solenoid valve (top left side of eng, near center of valve cover)
Evaporative emissions canister vent solenoid valve (behind left side of rear fascia splash shield, in wheelwell)
Fuel injectors
G110
Pnk
S105
S106
S109
Stop lamp switch (on brake pedal support c2 bracket)
Tan
Transaxle range switch (left side of eng compt, on transaxle)
Underhood electrical center (mounted to right strut tower)
Vehicle speed sensor (lower right side of eng compt, on transaxle)

3.8L (VIN K), Engine Performance Wiring Diagrams (3 of 4) for Buick Regal LS 1998

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List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (3 of 4) for Buick Regal LS 1998:

(body harn, under left rear seat)
(eng harn, left side of eng compt, 19 cm from transaxle cover breakout)
(eng harn, left top front of eng)
(eng harn, near air cleaner, 4 cm from pcm breakout)
(in exhaust system, rear of catalytic converter) heated oxygen sensor (ho2s) no2
(in right bank exhaust manifold) heated oxygen sensor (ho2s) no1
(lower left
(lower left side of eng, in oil pan) engine oil level indicator switch
(lower right side of eng, above transaxle) engine oil pressure indicator switch
(on throttle body assembly) idle air control (iac) valve
(top rear of eng, part of throttle body assembly) mass air flow sensor
A tan
A/c refrigerant pressure sensor (on left side of eng compt, on accumulator)
B12
Buick
C pnk
D pnk
Engine coolant temperature (ect) sensor (top left side of eng, below throttle body)
Exhaust gas recirculation valve (top rear of eng, near throttle body)
Front of eng)
Fuel tank pressure sensor (in fuel tank)
G110
Indicator lamp
Instrument cluster
Intake air temperature (iat) sensor (left rear of eng compt, in air cleaner duct)
Malfunction
Manifold absolute pressure sensor (top right of eng, on front of intake manifold)
Nca
Olds
Pnk
S105
S107
S122
S167
S409
Tan
Throttle position sensor (on throttle body assembly)

3.8L (VIN K), Engine Performance Wiring Diagrams (4 of 4) for Buick Regal LS 1998

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List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (4 of 4) for Buick Regal LS 1998:

(lower left front of eng)
(pin 12-15 not used)
(pin 30-32 not used)
(pin 40-41 not used)
(pin 47-48 not used)
(pin 51-54 not used)
(pin 62 & 64-65 not used)
(pin 70-75 not used)
(pin 8-9 not used)
(right rear shelf)
1-2 shift solenoid
2-3 shift solenoid
5v ref a
A/c compress clutch rly
A/c refrig press signal
A/c request signal
A/t iss solenoid
A11
Air conditioning system
Auto transaxle fluid temperature sensor
Automatic transaxle fluid pressure manual valve position switch
Cluster fuse 10a
Crank
Crank signal fuse 10a
Cruise control system
Cruise engaged input
D10
Ect sensor signal
Egr pintle position signal
Egr val ign positive volt
Eng oil level ind in
Eng oil press sensor sig
Evap can vent sol driver
F/pmp fuse 15a
F/pump relay
Fuel inj #3 driver
Fuel level sensor
Fuel level sensor input
Fuel pump
Fuel pump relay control
Fuel tank
Fuel tank press signal
Fuse block (behind right side of dash, in right door opening)
G110
G313
Gen terminal f output
Gen terminal l output
Ho2s 1 signal
Ho2s 2 signal
Hot at all times
Hot in run, bulb test or start
Hot in run, bulb test, or start
Hot in start
Iac coil a high
Iac coil a low
Iac coil b low
Iat sensor signal
Ignition positive volt (2)
Map sensor signal
Mil control
Oxy sen fuse 15a
Pc sol valve high
Pc sol valve low
Pcm- bcm fuse 10a
Pnk
Powertrain control module (left front side of eng compt, in air cleaner assembly)
Ps solenoid
Red
S106
S234
Sensor ground
Starter enable control
Starting/ charging system
Tan
Tcc release switch input
Tcc sol valve control
Tcc solenoid
Tft sensor signal
Tp sens or signal
Tr switch input a
Tr switch input c
Tr switch input d
Trans fluid press sw b
Trans fuse 10a
Transaxle
Underhood electrical center
Underhood electrical center (mounted to right strut tower)

EXTERIOR LIGHTS

Backup Lamps Wiring Diagram for Buick Regal LS 1998

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List of elements for Backup Lamps Wiring Diagram for Buick Regal LS 1998:

(body harness, under left rear seat) s424
F1 c1
F10
G313 (right side of rear shelf)
Hot at all times
Inside rearview mirror (electro- chromic)
Left backup lamp
R/cmpt rel fuse 7.5a
Right backup lamp
S405 (trunk harness, center of trunk lid)
S415
Transaxle range switch (left side of engine compt, on transaxle)
Underhood electrical center
Underhood electrical center (mounted to right strut tower)

Exterior Lamps Wiring Diagram for Buick Regal LS 1998

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List of elements for Exterior Lamps Wiring Diagram for Buick Regal LS 1998:

(body harness, right side of trunk, 23cm from body to trunk lid harness breakout, above right wheelwell) s408
(chmsl harness, center of rear window trim panel, 7cm from chmsl lamps breakout) s417
(on parking brake assy) park brake indicator switch
A c1
A10
A11
A12
A12 c3
A13
A14
A15
Anti-lock brakes system
B c1
Body control module (behind left side of dash)
C2 f12
Center high mounted stoplamp (chmsl)
Cornering lamp signal
Cruise control system
D11
D12
Daytime running lamps (drl) ambient light sensor (top center of dash, at base of windshield)
Daytime running lamps control module (behind left side of dash)
Drl fuse 10a
E10
E11
E12
E13
F11
Frt pk lps fuse 10a
Fuse block
Fuse block (behind right side of dash)
G108 (left side of front end upper tie bar)
G109 (right side of front end upper tie bar)
G204 (below dash, left side of steering column)
G204 (left side of strg column)
G313 (right side of rear shelf)
G400 (left front side of trunk)
Hazard
Hazard fuse 15a
Hazard lamp and turn signal lamp flasher (below left side of dash)
Head
Headlamp switch
Hot at all times
Hot in run
Hot in run, bulb test or start
Hvac fuse 10a
Instrument cluster
Left
Left headlamp
Left rear park lamps
Left rear side marker lamp
Left tail/ turn/ stop- lamp
Left turn indicator
License lamps
Nca
Normal
Off
Park
Park lps fuse 20a
Park/ turn signal lamp
Pnk
Power distribution
Right
Right headlamp
Right rear park lamps
Right rear side marker lamp
Right side of steering column, 12cm from ground breakout) s291
Right tail/ turn/ stop- lamp
Right turn indicator
S123
S124
S205 (dash harness, near steering column)
S233
S277 (dash harness, right side of steering column, near electrical connector)
S283
S402
S403
S416
Side marker lamp
Stop fuse 15a
Stoplamp switch (on brake pedal support bracket)
Tail lps fuse 15a
Turn fuse 10a
Turn signal switch
Underhood electrical center
Underhood electrical center (mounted to right strut tower)

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 2) for Buick Regal LS 1998

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List of elements for Ground Distribution Wiring Diagram (1 of 2) for Buick Regal LS 1998:

(ashtray harness, inside ashtray)
(c60/cj3)
(century)
(cj2)
(engine harness, 4 cm from engine coolant fan jumper breakout)
(engine harness, 7 cm from pcm breakout)
(front console harness, 65 cm from accessory power receptacle breakout)
(i/p harness, 8 cm from ebcm breakout)
(regal)
A/c clu diode
A/c compressor clutch coil
Accessory power receptacle (regal)
Ashtray lamp (century)
Automatic transaxle control position indicator bulb (regal)
Battery
Blower motor control module
Blower motor resistor
Brake fluid level indicator switch
C11
C60/cj3
Century
Cigar lighter (century)
Cigar lighter (regal)
Cj2
Console compartment lamp (regal)
Cool fan 2 relay
Data link connector
Door lock relay
Engine coolant level indicator module
Engine oil level indicator switch
Engine oil pressure indicator switch
F/pump relay
G101 (right side of engine compartment, at base of battery)
G102 (at base of left strut tower)
G108 (left side of front end upper tie bar)
G109 (right side of front end upper tie bar)
G120 (regal) (right side of engine)
G129 (century) (on transaxle stud)
G129 (on transaxle stud)
G201 (behind right side of dash)
Heated oxygen sensor 1
Heated oxygen sensor 2
Heater a/c control
Horns
I/p compartment lamp switch
Ign main relay
Ignition control module
Inflatable restraint sensing and diagnostic module
Inflatable restraint steering wheel coil
Left cornering lamp (regal)
Left electric actuator
Left engine coolant fan motor
Left fog lamp (regal)
Left headlamp
Left park/ turn lamp
Left radio control switch
Left side marker lamp
Mass air flow sensor
Nca
Power drop connector
Powertrain control module
Regal
Right cornering lamp (regal)
Right electric actuator
Right engine coolant fan motor
Right fog lamp (regal)
Right headlamp
Right park/ turn lamp
Right radio control switch
Right side marker lamp
S105
S106
S123 (forward lamp harn, bhind right headlamp)
S124 (forward lamp harn, below left headlamp)
S230 (i/p harness, 18 cm from radio breakout)
S284
S295
S335
Steering column electric park lock
Tranaxle range switch
Underhood accessory wiring junction block
Underhood lamp
Windshield washer pump
Windshield washer solvent level switch
Windshield wiper motor

Ground Distribution Wiring Diagram (2 of 2) for Buick Regal LS 1998

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List of elements for Ground Distribution Wiring Diagram (2 of 2) for Buick Regal LS 1998:

(ashtray harn inside ashtray) s295
(body harness, 4 cm from right rear speaker breakout)
(body harness, below driver's seat)
(body harness, right side of trunk)
(chmsl harness, 5 cm from chmsl breakout)
(courtesy lamp harness, 50 cm from right sunshade mirror)
(driver's seat harn, below driver's seat)
(left tail lamp harn)
(right front door harness, 8 cm from window switch breakout)
(right tail lamp harness)
A12
Body control
Body control module
Body harn, right side of trunk s418
C201
Center high mounted stop lamps
Cruise control module
Data link connector
Daytime running lamp control module
Driver information display switch
Driver seat adjuster switch
Driver seat back cushion cover
Driver seat cushion cover
Driver seat heater control module
Driver seat heater switch
E16
Electronic brake traction control module
Electronic traction control switch
Fog lamp switch
Fuel pump
Fuel tank
Fuse block
G202 (on steering column)
G204 (below dash, left side of steering column)
G205 (below dash, right side of steering column)
G309 (left front door sill)
G313 (right side of rear shelf)
G400 (left front side of trunk)
Hazard lamp/ turn signal lamp flasher
Headlamp dimmer switch
Headlamp switch
Ignition key alarm switch
Inside rearview mirror (day-night)
Inside rearview mirror (lighted)
Instrument cluster
Left backup lamp
Left front door lock
Left front door lock switch
Left front window switch
Left lighted visor mirror lamp
Left outside rearview mirror
Left rear door lock
Left rear park lamp
Left rear side marker lamp
Left roof rail courtesy/ reading lamp
Left tail/ stop/turn signal lamp
Low tire reset switch
Mobile telephone amplifier
Mobile telephone handset
Module
Nca
Outside remote control rearview mirror switch
Passenger seat adjuster switch
Passenger seat back cushion cover
Passenger seat cushion cover
Passenger seat heater control module
Passenger seat heater switch
Performance shift switch
Radio
Radio antenna module
Rear compartment lid ajar switch
Rear compartment lid release actuator
Rear license lamp
Rear window defogger grid
Remote cd changer
Remote control door lock receiver
Right backup lamp
Right front door lock
Right front door lock switch
Right front window switch
Right lighted visor mirror lamp
Right outside rearview mirror
Right rear door lock
Right rear park lamp
Right rear side marker lamp
Right roof rail courtesy/ reading lamp
Right tail/ stop/turn signal lamp
S211 (i/p harness, 20 cm from i/p breakout)
S283 (i/p harness, 4 cm from headlamp switch breakout)
S301 (body harn, next to passenger's seat)
S303
S330 (driver's seat harn, below driver's seat)
S333
S385
S402
S403
S406
S414
S416
S430
S604
Seat belt switch
Sunroof module
Tan
W/ cell phone
W/ dc4
W/ dd8

HEADLIGHTS

Headlight Wiring Diagram for Buick Regal LS 1998

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List of elements for Headlight Wiring Diagram for Buick Regal LS 1998:

(i/p harn, right side of steering column, approx 23cm from cluster breakout) s221
(left side of front end upper tie bar)
(right side of front end upper tie bar)
A10
B7 pnk
Battery
Body control module (left of steering column)
Daytime running lamps ambient light sensor (top center of dash)
Daytime running lamps control module (behind left side of dash)
Drl fuse 10a
E1 c2
E11
Exterior lights system
F10
F2 c3
Flash
Fog lamp switch
Fog lp ctrl
Fog lp relay
Frt park lps fuse 10a
Fuse block (behind right side of dash)
G108
G109
G204 (below dash, left side of steering column)
Gnd
Hdlp l fuse 15a
Hdlp r fuse 15a
Head
Headlamp dimmer switch
Headlamp switch
Headlamps on
High
High beam
High beam indicator
Hot at all times
Hot in run
Hot in run, bulb test and start
Hvac fuse 10a
Ign 1
Ign 2
Illum
Instrument cluster
Interior lights system
Left fog lamp
Left headlamp
Lf turn-sig feed
Lf turn-sig sw out
Light sensor in
Light sensor sig
Low
Low beam
Lp park fuse 20a
Off
P-brake in
P-brake sw alarm
Park
Park brake indicator switch
Park lamp sw out
Park lp off
Pnk
Radio- hvac fuse 15a
Rf turn-sig feed
Rf turn-sig sw out
Right fog lamp
Right headlamp
S123
S124
S202
S277 (i/p harn, right side of steering column, approx 4cm from splice pack breakout)
S283
Tan
Underhood accessory wiring junction block (mounted to right strut tower)
Warning system (body control module)

HORN

Horn Wiring Diagram for Buick Regal LS 1998

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List of elements for Horn Wiring Diagram for Buick Regal LS 1998:

(behind right side of front bumper)
(steering column)
Body control module (bcm)
G109 (right side of front end upper tie bar)
G201 (behind right side of dash)
High note horn
Horn fuse 15a
Horn out- put
Horn relay
Horn switch
Horns
Hot at all times
Inflatable restraint steering wheel module
Low note horn
Red
S123
S230
Slip ring
Turn signal cancel cam
Turn signal switch
Underhood electrical center (mounted on right front strut tower)

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram for Buick Regal LS 1998

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List of elements for Instrument Cluster Wiring Diagram for Buick Regal LS 1998:

(below dash, left side of steering column) g202
(dash harn, 4 cm from ebtcm breakout)
(not used)
(right side of engine compt, on strut tower) underhood accessory wiring junction block
A10
A11
A12
Air bag ind
Antilock ind
Antilock ind ctrl
B10
B11
B12
Battery
Body control module (behind left side of dash, left of steering column)
Brake fluid level indicator switch (in brake fluid reservoir)
Brake ind
Brake ind ctrl
Brk ind
Change oil soon ind
Change oil soon ind ctrl
Charge ind
Charge ind ctrl
Cluster fuse 10a
Coolant temp ind
Coolant temp ind ctrl
Coolant temperature gauge
Crank
Crank signal fuse 10a
Crs sig
Cruise control module (front of left strut tower)
Cruise ind
Cruise ind ctrl
Cruise sig in
D12
Data link connector (under left side of dash, right of steering column)
Dim
Door ajar ind
Door ajar ind ctrl
Driver information display switch
E/m
Electronic brake/traction control module (below left side of dash, left of steering column)
Engine controls system
Engine coolant level indicator module (mounted on right side of radiator)
Exterior lights system
Fuel gauge
Fuse block
G102 (at base of left strut tower)
G129 (on transaxle stud)
G201 (behind right side of dash)
G202 (on steering column)
Ground
Heater-a/c control
High beam ind
Hot at all times
Hot in off, run or start
Hot in run, bulb test and start
Hot in start
Ign
Ign 0 fuse 10a
Illumination
Instrument cluster
Interior lights system
Left turn ind
Left turn lamp ctrl
Low coolant ind
Low fuel ind
Low fuel ind ctrl
Low oil ctrl
Low oil ind
Low tire ind
Low tire ind ctrl
Low trac ind
Low trac ind ctrl
Low washer fluid signal
Low washer ind
Low wshr ind ctrl
Malfunction indicator lamp
Mode
Oil pres ind ctrl
Oil pressure ind
Perf shift ind
Perf shift ind ctrl
Pk lps
Pnk
Powertrain control module (left front side of engine compt, in air cleaner assy)
Prndl position ind ctrl
Radio, hvac rfa fuse 15a
Reset
Right turn ind
Right turn lamp ctrl
S106
S202
S211
S230
S234
S270
S281 (dash harn, right of steering column)
S283
S284
S286
Seat belt ind
Seat belt ind ctrl
Security ind
Security ind ctrl
Serial data
Service vehicle soon ind
Service vehicle soon ind (amber)
Service vehicle soon ind ctrl
Speedometer
Splice pack (sp205) (below dash, right of steering column)
Srl data
Tachometer
Trac off ind
Trac off ind ctrl
Vss signal
Windshield washer solvent level switch (right front of engine compt)

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for Buick Regal LS 1998

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List of elements for Courtesy Lamps Wiring Diagram for Buick Regal LS 1998:

(body harn, below right front seat) s322
(dd8) (dc4)
(dd8) (dc4) b
(i/p harn, right side of dash)
(i/p harn, right side of steering column)
(quarter courtesy and reading lamp harn, approx 5 cm from 8-pin in-line conn, behind right "c" pillar)
Body control module (bcm) (behind left side of dash, left of steering column)
C16
Console compartment lamp
Console compartment lamp switch
Court lps (grd)
Court lps on
D15
D16
Dome
Dome lamp
Door ajar
Driver dr ajar
Exterior lights system
Frt park lps fuse 10a
Fuse block
G102 (at base of left strut tower)
G201 (behind right side of dash)
G204 (below dash, left side of steering column)
G309 (left front door sill)
G313 (right side of rear shelf)
Head
Headlamp switch
Hot at all times
Hot in accy and run
I/p compart- ment lamp switch
Inside rear view mirror
Left front door ajar indicator switch
Left front door courtesy lamp (2 bulbs)
Left i/p courtesy lamp
Left lighted visor mirror lamp
Left rear door ajar indicator switch
Left roof rail courtesy/ reading lamp
Lp park fuse 20a
Off
Panel dimming fuse 7.5a
Park
Power drop fuse 10a
Rear compartment lamp
Rear compartment courtesy lamp switch
Regal
Right front door ajar indicator switch
Right front door courtesy lamp (2 bulbs)
Right i/p courtesy lamp
Right lighted visor mirror lamp
Right rear door ajar indicator switch
Right roof rail courtesy/ reading lamp
S214 (i/p harn, right side of steering column)
S230
S267
S277
S283
S284
S303
S320 (body harn, below right front seat)
S321 (body harn, under right front door pillar)
S335
S384 (quarter courtesy and reading lamp harn, approx 25 cm from left lighted visor mirror breakout)
S385
S386 (quarter courtesy and reading lamp harn, approx 35 cm from 8-pin in-line conn, behind right "c" pillar)
S387
S430
S504
S604
Tail lamps fuse 15a
Theater dim (grd)
Theater dim 1
Theater dim 2
Trunk ajar (bat)
Under- hood lamp
Underhood electrical center

Instrument Illumination Wiring Diagram for Buick Regal LS 1998

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List of elements for Instrument Illumination Wiring Diagram for Buick Regal LS 1998:

(body harn, below right front seat) s302
(c60/cj3)
(cj2)
(cj2) c16
(i/p harn, right of steering column) s277
(i/p harn, right side of dash)
Ashtray lamp (century)
Automatic transaxle control position indicator bulb
Dome
Driver seat heater and traction control switch
Driver seat heater switch
E16
Electronic traction control switch (regal)
Fog lamp switch
Fuse block
G201 (behind right side of dash)
G204 (below dash, left side of steering column)
G205 (below dash, right side of steering column)
G309 (left front door sill)
Grd
Head
Headlamp switch
Heater- a/c control
High
Hot at all times
Illum
Inflatable restraint steering wheel module coil
Instrument cluster
Left door lock switch
Left front window switch
Low
Lp park fuse 20a
Off
Outside remote control rear view mirror switch
Panel dimming fuse 7.5a
Park
Passenger seat heater switch
Radio
Radio control switches
Red
Right door lock switch
Right front window switch
S211
S230
S241 (i/p harn, below radio)
S267
S283
S295
S303
S504
S506 (left front door harn, in left front door)
S604
S606 (right front door harn, in right front door)
Strg whl cont fuse 2a
Tail lamps fuse 15a
Underhood electrical center
Vf dim dis sig
Vf dim sig
W/ heated seats
W/o heated seats

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 3) for Buick Regal LS 1998

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List of elements for Power Distribution Wiring Diagram (1 of 3) for Buick Regal LS 1998:

(body harn, right floor near passen- ger's seat)
(i/p harness, 21 cm from bulkhead grommet) s275
(i/p harness, right of steering column)
A/c clu fuse 10a
A/c clu relay
Abs-bcm fuse 10a
Accessory power receptacle
B (century) (regal) c
B12
Bat 1 maxi fuse 60a
Bat 2 maxi fuse 60a
Bat 3 maxi fuse 60a
Battery
Blower motor control module
Blower motor resistor
Body control module
C12
C201
C60/cj3
Cd changer fuse 10a
Century
Cigar lighter
Cigar ltr fuse 20a
Cj2
Cool fan 1 maxi fuse 40a
Cool fan 1 relay
Cool fan 2 maxi fuse 30a
Cool fan 2 relay
Cool fan 3 relay
Crank maxi fuse 40a
Crank relay
Data link connector
Daytime running lamp control module
Door lock relay
Door locks fuse 20a
Driver seat heater control module
Driver's seat adjuster switch
Ecm fuse 10a
Electronic brake control module/ electronic brake traction control module
Electronic brake control relay
F/pmp fuse 15a
F/pmp relay
From a remote battery stud (diagram 1 of 3)
From bat 2 maxi fuse (diagram 1 of 3)
Fuse block
Fusible link (10 ga-rust)
G201 (behind right side of dash)
Gen fuse 10a
Generator
Hazard fuse 15a
Hdlp l fuse 15a
Hdlp r fuse 15a
Headlamp switch
Heater- a/c control
High blower fuse 25a
Horn fuse 15a
Horn relay
Inadv power bus fuse 15a
Instrument cluster
L heated seat fuse 15a
Left headlamp
Lp park fuse 20a
Mobile telephone amplifier
Mobile telephone handset
Nca
Outside remote control rearview mirror switch
Passenger seat heater control module
Passenger's seat adjuster switch
Power mirrors fuse 10a
Power seats circuit breaker 30a
Powertrain control module
R heated seat fuse 15a
R/cmpt rel fuse 7.5a
Radio
Radio- hvac fuse 15a
Rear defogger circuit breaker 30a
Rear window defogger relay
Red
Regal
Remote battery stud
Remote cd changer
Remote control door lock receiver
Right headlamp
S202
S269 (i/p harness, near blower motor)
S319
S335
S336
Starter
Stop lamp switch
Stop lamps fuse 15a
To accessory time delay relay (diagram 2 of 3)
To hdlp l fuse (diagram 1 of 3)
To high blower fuse (diagram 1 of 3)
To ign 2 maxi fuse (diagram 2 of 3)
Transaxle range switch
Turn signal switch
Underhood accessory wiring junction block

Power Distribution Wiring Diagram (2 of 3) for Buick Regal LS 1998

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List of elements for Power Distribution Wiring Diagram (2 of 3) for Buick Regal LS 1998:

(body harness, top of floor tunnel between front seats)
(body harness, under left side of rear seat)
(cj2)
(cj2) (c60/cj3)
(i/p harn, behind right side of dash)
(i/p harness, 4 cm from radio breakout)
(i/p harness, near blower motor)
(i/p harness, near steering column)
(i/p harness, right side of steering column)
A nca
Accessory time delay relay (behind i/p compt, under- side of cross- car beam)
Accy
Automatic transaxle control
Bcm fuse 10a
Body control module
Body control module (below left side of dash)
Bulb test
C13
C201
C5 c (c60/cj3)
Console compt lamp switch (regal)
Crank signal fuse 10a
Cruise control module
Cruise control release switch
Cruise control switch
Cruise fuse 10a
Daytime running lamp control module
Driver seat heater switch
From gen d fuse (diagram 1 of 3)
From ignition switch (diagram 2 of 3)
From inadv power bus fuse (diagram 1 of 3)
Fuse block
Heater- a/c control
Hvac fuse 10a
Ign 0 fuse 10a
Ign1 maxi fuse 30a
Ign2 maxi fuse 40a
Ignition switch
Inflatable restraint steering wheel coil
Inside rearview mirror
Instrument cluster
Left electric actuator
Left front window switch
Left radio control switches
Lock
Low blower fuse 20a
Mobile telephone handset
Nca
Nca a
Off
Park lock fuse (regal) 10a
Passenger seat heater switch
Pnk
Power drop fuse 10a
Powertrain control module
Pwr windows pwr sunroof circuit breaker 30a
Radio
Radio fuse (w/o rap) 2a
Radio fuse 2a
Rear window defogger relay
Red
Right electric actuator
Run
S220
S233
S234
S240
S249
S263
S270
S323
S410
Start
Sunroof module
To crank signal fuse (diagram 2 of 3)
To ign main relay (diagram 3 of 3)
To low blower fuse (diagram 2 of 3)
To s228 (diagram 3 of 3)
Under- hood accessory wiring junction block
Underhood accessory wiring junction block
Underhood accessory wiring junction box
Vacuum electric solenoid
W/ rap
W/o rap
Wind- shield wiper/ washer switch
Windshield wiper motor
Wiper fuse 25a

Power Distribution Wiring Diagram (3 of 3) for Buick Regal LS 1998

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List of elements for Power Distribution Wiring Diagram (3 of 3) for Buick Regal LS 1998:

(century)
(engine harn, top left of engine) (regal) (injector harn, 2 cm from injector 2 breakout) (century)
(i/p harness, right of steering column)
(i/p harness, right side of dash)
(not used)
(regal)
A/c clu relay
Abs fuse 10a
Air bag fuse 15a
Automatic transaxle
Automatic transaxle control
B12
Body control module
Btsi park lock fuse 10a (regal)
C12
Cluster fuse 10a
Crank relay
Daytime runnning lamp control module
Drl fuse 10a
Electronic brake control module/ electronic brake traction control module
Electronic brake control relay
Electronic traction control switch
Elek ign fuse 15a
Eng emis fuse 10a
Evaporative emissions canister purge solenoid valve
Evaporative emissions canister vent solenoid valve
F/injr fuse 15a
From ign1 e maxi fuse (diagram 2 of 3)
From ignition switch (diagram 2 of 3)
Fuel injector
Fuse block
G129 (on transaxle)
Heated oxygen sensor 1
Heated oxygen sensor 2
Ign main relay
Ignition control module
Inflatable restraint sensing and diagnostic module
Instrument cluster
Mass air flow sensor
Nca
Oxy sen fuse 15a
Pcm-bcm fuse 10a
Pnk
Powertrain control module
S106
S109
S228
S287
Stop lamp switch
Supercharger bypass valve (3.8l vin 1)
Trans fuse 10a
Turn signal switch
Turn signals fuse 10a
Underhood accessory wiring junction block

POWER DOOR LOCKS

Power Door Lock Wiring Diagram for Buick Regal LS 1998

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List of elements for Power Door Lock Wiring Diagram for Buick Regal LS 1998:

(body harn, center floor on left side of tunnel) s315
(body harness, below right door speaker, 44cm from power door breakout) s314
Abs-bcm fuse 10a
All drs lock
Battery
Battery (b+)
Body control module (behind left side of dash, left side of steering column)
C14
C15
D12
D13
Door lock fuse 20a
Door lock relay (behind dash, attached to cross- car body beam)
Doors lock
Doors unlock
Driver unlk
Fuse block (right side of dash)
G201 (behind right side of dash)
G204 (behind dash, left side of steering column)
G205 (behind dash, right side of steering column)
G309 (left front door sill)
Ground
Hot at all times
Interior lights system
Left front door lock actuator
Left front door lock switch
Left rear door lock actuator
Lock
Pass drs unlk
Radio-hvac fuse 15a
Remote control door lock receiver (rke) (left side of dash, right side of cluster)
Rfa link
Right front door lock actuator
Right front door lock switch
Right rear door lock actuator
Rr lid release
S202
S211
S230
S269
S283
S303
S504
Tan
Trunk, tailgate, fuel doors system
Unlock

POWER MIRRORS

Photochromic Mirror Wiring Diagram for Buick Regal LS 1998

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List of elements for Photochromic Mirror Wiring Diagram for Buick Regal LS 1998:

(body wiring harness, approximately 6 cm from grommet, under left rear seat) s424
(right side of rear shelf) g313
(windshield side) ambient sensor
A6 c2
B c1
C1 f6
Fuse block (behind right side of dash, in right door opening)
Gnd
Headlight sensor (mirror side)
Hot at all times
Hot in run
Hvac fuse 10a
Inside rearview mirror (day-night)
Interior lights system
Left mirror switch
Mirror on
Off
R/cmpt rel fuse 7.5a
Resets to daytime high reflectivity in reverse
Right mirror switch
S233
S323
S385
Solid state
Transaxle range switch (left side of engine compart- ment, on transaxle)
Underhood (u/h) electrical center (mounted to right strut tower)
W/ heated seats
W/o heated seats

Power Mirrors Wiring Diagram for Buick Regal LS 1998

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List of elements for Power Mirrors Wiring Diagram for Buick Regal LS 1998:

(1998)
(1999)
(left front door sill) g309
Buick
Driver's seat) g309
Ecb
Fuse block
Hot at all times
Interior lights system
Left mirror
Left outside rearview mirror
Mirror motor pack
Nca
Olds- mobile
Outside remote control rearview mirror switch
Power mirrors fuse 10a 2a
Right mirror
Right outside rearview mirror
Right/ left motor
S504
Up/ down motor

POWER SEATS

6-Way Power Seat Wiring Diagram for Buick Regal LS 1998

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List of elements for 6-Way Power Seat Wiring Diagram for Buick Regal LS 1998:

(left front door sill)
Back
Down
Driver seat adjuster motor assembly
Driver seat adjuster switch
Entire seat
For- ward
Front height
Front passenger seat adjuster motor assembly
Front passenger seat adjuster switch
Front vertical adjuster motor
Fuse block
G309
Horizontal adjuster motor
Hot at all times
Nca
Power seats circuit breaker 30a
Rear height
Rear vertical adjuster motor
S303
S326
S330
Tan

Heated Seats Wiring Diagram for Buick Regal LS 1998

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List of elements for Heated Seats Wiring Diagram for Buick Regal LS 1998:

Driver heated seat back element
Driver heated seat control module
Driver heated seat cushion cover
Driver heated seat cushion element
Driver heated seat switch
Driver heated seat thermistor
Front passenger heated seat control module
G309 (left front door sill)
Ground
Hot at all times
Hot in run
Hvac fuse 10a
I/p fuse block
Interior lights system
Lh heated seat fuse 15a
Lo/hi input
Nca
On input
Passenger heated seat back element
Passenger heated seat cushion cover
Passenger heated seat cushion element
Passenger heated seat switch
Passenger heated seat thermistor
Pnk
Rh heated seat fuse 15a
S303
S323
S333
Sensor input

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagrams for Buick Regal LS 1998

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List of elements for Power Top/Sunroof Wiring Diagrams for Buick Regal LS 1998:

(not used)
Battery
Close
Fuse block (behind right side of dash, in right door opening)
G313 (right side of rear shelf)
Gnd
Hot w/ acc time delay (rap) relay energized
Limit switch module (center rear of sun roof module)
Ls1
Ls2
Ls3
Nca
Open
Pos 1
Pos 2
Pos 3
Power windows system
Pwr windows pwr sun roof circuit breaker 30a
Red
S410
S414
Sun roof module (right corner of sun roof)
Sunroof actuator (center rear of sun roof module)
Sunroof switch

POWER WINDOWS

Power Window Wiring Diagram, 4 Door for Buick Regal LS 1998

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List of elements for Power Window Wiring Diagram, 4 Door for Buick Regal LS 1998:

(buick)
(buick, olds)
(buick: body harn, on floor under driver's seat)
(chev, pontiac)
(chev: crossbody harn below right front seat)
(olds: body harn, center of floor behind front seats)
(oldsmobile)
(pontiac: body harn, on floor near center of vehicle)
Buick oldsmobile
Buick, olds chevrolet
Chevrolet
Down
Ecb
Express
Express down module
Fuse block (behind right side of dash, in right) door opening)
G309 (left front door sill)
G316 (right front door sill)
Hot in acc, run or during rap
Hot in run
Illumination lamp
Interior lights system
Left front
Left front window motor
Left front window switch
Left rear
Left rear window motor
Left rear window switch
Lock out switch
Pontiac
Power window circuit breaker 20a
Pwr window pwr sunroof circuit breaker 30a
Right front
Right front window motor
Right front window switch
Right rear
Right rear window motor
Right rear window switch
S303
S307
S310 s410
S504
S604
Tan

RADIO

Radio Wiring Diagrams for Buick Regal LS 1998

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List of elements for Radio Wiring Diagrams for Buick Regal LS 1998:

A c2
Ant in
Antenna module
B c2
Bare
Battery
Cd changer fuse 10a
Cd com
Cd in
Data link connector (right of steering column)
Dimmer sig
Drain
E & c data
E10
E11
E12
E13
E14
E15
E16
F10
F11
F12
F13
F14
F15
F16
Fixed mast antenna
Fuse block
Fused feed
G202 (behind dash, right of steering column)
Ground
Hot at all times
Hot in run, acc or w/ retained accessory power
Inflatable restraint steering wheel control module
Interior lights system
Left front door speaker
Left front tweeter
Left rear speaker
Left steering wheel radio controls
Lf spkr
Lr spkr
Lt cd sig
Nca
Radio
Radio antenna module (on rear window header panel)
Radio fuse 2a
Radio pwr
Radio, hvac fuse 15a
Rap pwr
Rear window antenna grid
Remote cd player
Rf spkr
Right front door speaker
Right front tweeter
Right rear speaker
Right steering wheel radio controls
Rr spkr
Rt cd sig
S202
S239
Strg ctrl
Sw 1
Sw 2
Sw 3
Sw 4
Sw 5
Sw 6
Sw 7
Sw 8
Tan

SHIFT INTERLOCKS

Shift Interlock Wiring Diagram for Buick Regal LS 1998

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List of elements for Shift Interlock Wiring Diagram for Buick Regal LS 1998:

(on transaxle stud)
A12
Automatic transaxle control (btsi) (center of console assembly)
Automatic transmission shift lock control actuator (btsi) (in column shift)
Btsi park lock fuse 10a
Btsi solenoid
C11
Century, intrigue
G129
Hot in run, bulb test or start
I/p fuse block (right side of dash, in right door opening)
Park lock solen- oid
Pnk
Pnk a
Regal
Regal century, intrigue
S105
S106 (intrigue) (regal, century)
Stoplamp switch (open when brake pedal depressed) (on brake pedal support)
Transaxle range switch (on top right rear of transaxle)
Underhood fuse block

STARTING/CHARGING

Charging Wiring Diagram for Buick Regal LS 1998

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List of elements for Charging Wiring Diagram for Buick Regal LS 1998:

(not used) a
A8 c1
B12
Battery
Charge ind
Cluster fuse 10a
Computer data lines
Fuse block (behind right side of dash)
Fusible link (10 ga- rust)
G101 (right side of engine compt, at base of battery)
G129 (left of starter, on transaxle stud)
Gen fuse 10a
Gen. term. f monitor
Gen. term. l output c2
Hot at all times
Hot in run, bulb test or start
Instrument cluster
L generator
P b+
Pnk
Power distribution system
Powertrain control module (pcm) (left side of engine compt, in air cleaner assembly)
Red
Ser. data class 2 c1
Solid state
Splice pack (s205) (below dash, right of steering column)
Starter solenoid
Underhood accessory wiring junction block (on right strut tower)

Starting Wiring Diagram for Buick Regal LS 1998

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List of elements for Starting Wiring Diagram for Buick Regal LS 1998:

Accy
B red
Battery
Bulb test
Charging circuit (fuse link)
Crank maxifuse 40a
Crank relay
Crank signal
Crank signal fuse 10a
Fuse block (behind right side of dash)
G101 (right side of engine compt, at base of battery)
G129 (left of starter, on transaxle stud)
Hold- in coil
Hot at all times
Ign main 1 maxifuse 40a
Ignition switch
Lock
Nca
Off
Pcm- bcm fuse 10a
Pnk
Powertrain control module (pcm) (left side of engine compt, in air cleaner assembly)
Pull- in coil
Red
Remote battery stud
Run
S228
S234
Start
Starter enable control
Starter motor
Starter solenoid
Transaxle range switch (on transaxle)
Underhood accessory wiring junction block (on right strut tower)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraint Wiring Diagram for Buick Regal LS 1998

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List of elements for Supplemental Restraint Wiring Diagram for Buick Regal LS 1998:

Air bag fuse 15a
B12
Belt sw
Body control module (behind left side of dash)
Buick
C11
Cluster fuse 10a
Data line
Data link connector (below left side of dash)
Driver hi
Driver lo
Fuse block (behind right side of dash)
G201 (behind right side of dash)
G309 (left front door sill)
Ground
Hot in run, bulb test or start
Ignition
Indicator
Inflatable restraint i/p module (upper right side of dash)
Inflatable restraint sensing and diagnostic module (under right front seat)
Inflatable restraint steering wheel module (center of steering wheel)
Inflatable restraint steering wheel module coil
Instrument cluster
Nca
Nca b
Olds
Pass hi
Pass lo
Pnk
S226 (dash harn, right side of dash)
S330 (driver's seat harn, below driver's seat)
Seat belt switch
Shorting bar
Sir ind
Tan

TRANSMISSION

3.8L

3.8L (VIN 1), Transmission Wiring Diagram, 4T65-E for Buick Regal LS 1998

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List of elements for 3.8L (VIN 1), Transmission Wiring Diagram, 4T65-E for Buick Regal LS 1998:

1-2 shift sol
2-3 shift sol
5v reference a
A/t iss sensor hi
A/t iss sensor lo
Automatic transaxle (4t65-e)
Automatic transaxle fluid pressure manual valve position switch
Automatic transaxle fluid temperature sensor
Automatic transaxle input shaft speed sensor
B12
Battery in
Body control module & instrument cluster
Class ii data
Cluster fuse 10a
Data link connector (partial) (below dash, right of steering column)
Ecm fuse 10a
Ect sensor in
Ect sensor return
Eng emis fuse 10a
Engine controls system
Engine coolant temperature sensor (below throttle body)
Fuse block
G129 (left side of engine on transaxle stud)
G129 (lower left side of engine on transaxle stud)
Hot at all times
Hot in run, bulb test or start
Ign 0 fuse 10a
Ignition 1 in
Ignition wake up in
Instrument cluster
Malfunction indicator lamp
Mil ctrl
Pc sol hi
Pc sol lo
Pcm ground
Pcm-bcm fuse 10a
Pnk
Powertrain control module (forward right front strut tower)
Pressure control sol
Red
Rev
S105
S106
S107 (eng harn, approx 2 cm from icm c2 conn breakout)
S122 (eng harn, approx 15 cm from pcm breakout)
S270
Splice pack sp205 (below dash, right of steering column)
Stop lamp switch
Tcc pwm sol
Tcc release
Tcc release in
Tcc/ brake switch
Tcc/brake sw in
Tft sensor in
Tft sensor return
Throttle position sensor
To: body control module, ign main relay & crank relay
Tp sensor in
Tp sensor return
Tr sw in-a
Tr sw in-b
Tr sw in-c
Tr sw in-p
Trans fuse 10a
Trans range a in
Trans range b in
Trans range c in
Transaxle range switch (top of transaxle)
Underhood electrical center
Vehicle speed sensor (lower right rear of engine compt, end of transaxle)
Vss hi in
Vss lo in

3.8L (VIN K), Transmission Wiring Diagram, 4T65-E for Buick Regal LS 1998

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List of elements for 3.8L (VIN K), Transmission Wiring Diagram, 4T65-E for Buick Regal LS 1998:

1-2 shift sol
2-3 shift sol
5v reference a
A/t iss sensor hi
A/t iss sensor lo
Automatic transaxle (4t65-e)
Automatic transaxle fluid pressure manual valve position switch
Automatic transaxle fluid temperature sensor
Automatic transaxle input shaft speed sensor
B12
Battery in
Body control module & instrument cluster
Class ii data
Cluster fuse 10a
Data link connector (partial) (below dash, right of steering column)
Ecm fuse 10a
Ect sensor in
Ect sensor return
Eng emis fuse 10a
Engine controls system
Engine coolant temperature sensor (below throttle body)
Fuse block
G129 (left side of engine on transaxle stud)
G129 (lower left side of engine on transaxle stud)
Hot at all times
Hot in run, bulb test or start
Ign 0 fuse 10a
Ignition 1 in
Ignition wake up in
Instrument cluster
Malfunction indicator lamp
Mil ctrl
Pc sol hi
Pc sol lo
Pcm ground
Pcm-bcm fuse 10a
Pnk
Powertrain control module (forward right front strut tower)
Pressure control sol
Red
Rev
S105
S106
S107 (eng harn, approx 2 cm from icm c2 conn breakout)
S122 (eng harn, approx 15 cm from pcm breakout)
S270
Splice pack sp205 (below dash, right of steering column)
Stop lamp switch
Tcc pwm sol
Tcc release
Tcc release in
Tcc/ brake switch
Tcc/brake sw in
Tft sensor in
Tft sensor return
Throttle position sensor
To: body control module, ign main relay & crank relay
Tp sensor in
Tp sensor return
Tr sw in-a
Tr sw in-b
Tr sw in-c
Tr sw in-p
Trans fuse 10a
Trans range a in
Trans range b in
Trans range c in
Transaxle range switch (top of transaxle)
Underhood electrical center
Vehicle speed sensor (lower right rear of engine compt, end of transaxle)
Vss hi in
Vss lo in

TRUNK, TAILGATE, FUEL DOOR

Trunk Release Wiring Diagram for Buick Regal LS 1998

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List of elements for Trunk Release Wiring Diagram for Buick Regal LS 1998:

C1 c
C2 b9
F9 c1
G313 (right side of rear shelf)
Hot at all times
R/cmpt rel fuse 7.5a
Rear compart- ment lid lock release actuator (mounted to rear compt lid)
Rear compartment lid release relay (behind right side of dash, mounted on underside of cross beam)
Remote control door lock receiver (rcdlr) (left side of dash, on right side of instrument cluster)
S430
Transaxle range switch (left of engine, on transaxle)
Underhood accessory wiring junction block (mounted to right strut tower)

WARNING SYSTEMS

Warning System Wiring Diagrams for Buick Regal LS 1998

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List of elements for Warning System Wiring Diagrams for Buick Regal LS 1998:

(below left side of dash) electronic brake traction control module (ebtcm)
(body harn, on floor, under passenger's seat) s322
(left side of engine, in air cleaner) powertrain control module (pcm)
(low tire) serial data class
(seat belt) serial data class
(w/ heated seats)
(w/o heated seats) s303
Accessory
Ajar
B10
B12
Bcm fuse 10a
Body control module (bcm) (behind left side of dash, left of steering column)
C11
C12
C13
C16
Cluster fuse 10a
Computer data lines system
Crank
Crank signal fuse 10a
Ctsy
D16
Daytime running lamp control module (behind left side of dash)
Door ajar
Fuse block
G202 (below dash, right side of steering column)
G309 (left front door sill)
Ground
Head
Headlamp switch
Hot at all times
Hot in accy
Hot in off, bulb test, run or start
Hot in run, bulb test or start
Hot in start
Ign 0 fuse 10a
Igni- tion
Ignition 0
Ignition 1
Ignition switch (key in ignition switch)
Instrument cluster
Interior lights system
Key in ign
Left front door lock (ajar indicator switch)
Lp park fuse 20a
Nca
Off
Or run
P/b input
P/b switch signal alarm
Park
Park brake (ign 1)
Park brake indi- cator switch
Park lp off
Pcm-bcm fuse 10a
Pnk
S211
S234
S270
S330
S504
Seat belt switch
Seat belt switch (ign 1)
Serial data class
Serial data class 2
Splice pack sp205 (below dash, right side of steering column)
Tan
Tire infla- tion reset switch
Tire inflation reset switch (in fuse block)
Under- hood acces- sory wiring junction block

WIPER/WASHER

Wiper/Washer Wiring Diagram for Buick Regal LS 1998

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List of elements for Wiper/Washer Wiring Diagram for Buick Regal LS 1998:

Fuse block (behind right side of dash)
G102 (base of left strut tower)
G201 (behind right side of dash)
Hot in acc or run
Mist
Off
Pulse
Red
S230
S249
S284
Washer switch
Windshield washer pump
Windshield wiper motor
Windshield wiper/washer switch
Wiper fuse 25a
Wiper switch