All Wiring Diagrams for Buick Regal Custom 1990

COOLING FAN

3.1L

3.1L (VIN T), Cooling Fan Wiring Diagram for Buick Regal Custom 1990

List of elements for 3.1L (VIN T), Cooling Fan Wiring Diagram for Buick Regal Custom 1990:

• (below exhaust manifold) g133
• A/c compressor control relay
• A/c intermediate pressure sensor (left front engine compt, on accumulator)
• B20
• C10
• C16
• Coolant temperature sensor (left front of engine)
• D21
• Defogger coolant fan fusible element g 60a
• Engine control module (right front engine compt)
• Engine controls system
• Fusible element e 30a
• G133 (below exhaust manifold)
• Hot at all times
• Hot in run
• Ign fuse 10a
• Nca
• Primary coolant fan relay
• Primary cooling fan
• Red
• Right side electrical center (right side of engine compt)
• Secondary coolant fan relay
• Secondary cooling fan

3.8L

3.8L (VIN L), Cooling Fan Wiring Diagram for Buick Regal Custom 1990

List of elements for 3.8L (VIN L), Cooling Fan Wiring Diagram for Buick Regal Custom 1990:

• (1990 all & 1991 early)
• (1990) (1991-93)
• (1990-92) (1993)
• (1991 late & 1992-93)
• (on engine) g133
• 1991-93
• A13
• A19 (1990)
• C13
• D19 (1991-93)
• Engine control module (right front engine compt)
• Engine controls system
• Engine coolant temperature sensor (top of engine)
• Fan a/c pressure switch (on a/c line near acumulator
• Fan fuse 3a
• Fan relay 1
• Fan relay 2
• Fan relay 3
• Fusible element d element n 30a
• Fusible element e element m 30a
• G133 (on engine)
• Hot at all times
• Hot in run
• Ign fuse 10a 15a
• Nca
• Primary coolant fan
• Red
• Right side electrical center (right side of engine compt)
• Secondary coolant fan

DEFOGGERS

Defogger Wiring Diagram for Buick Regal Custom 1990

List of elements for Defogger Wiring Diagram for Buick Regal Custom 1990:

• ('91-'93 w/ c68)
• (1990 regal & cut supreme)
• (1990-92)
• (1993)
• (all others)
• (c67)
• (c67) (c68)
• (c68) (c67)
• 1990-91
• 1990-92
• 1992-93
• C1 c1
• C1 c3
• C3 c1
• Clust fuse 10a
• Component center (right side of i/p)
• Defogger switch
• Fuse block (right side of i/p)
• G102 (left strut tower)
• G110 (lower left front of eng)
• G205 (right side of steering column bracket)
• G300 (under left front seat)
• G301 (under right front seat)
• Heater & a/c control assembly
• Hot at all times
• Hot in run
• Hot in run, bulb test or start
• Illum
• Indic fuse 10a
• Interior lights system
• Nca
• On ind
• Rear defog circuit breaker 30a
• Rear defogger
• Rear defogger timer relay (in component center)
• Timer

HORN

Horn Wiring Diagram, 2 Door for Buick Regal Custom 1990

List of elements for Horn Wiring Diagram, 2 Door for Buick Regal Custom 1990:

• Forward light electrical center (right side of engine compt)
• Fuse block (right side of i/p)
• G108 (left radiator support)
• Horn (front left side of engine compt)
• Horn fuse 15a
• Horn relay
• Horn switch
• Hot at all times
• Slip ring
• Steering wheel

Horn Wiring Diagram, 4 Door for Buick Regal Custom 1990

List of elements for Horn Wiring Diagram, 4 Door for Buick Regal Custom 1990:

• Fuse block (right side of i/p)
• G108 (left radiator support)
• Horn (front left side of engine compt)
• Horn fuse 15a
• Horn relay (right side of steering column)
• Horn switch
• Hot at all times
• Slip ring
• Steering wheel

POWER ANTENNA

Power Antenna Wiring Diagram for Buick Regal Custom 1990

List of elements for Power Antenna Wiring Diagram for Buick Regal Custom 1990:

• 30a
• Antenna
• Antenna coax lead
• Antenna motor
• Antenna relay (in fender, behind right rear wheelhouse)
• C c
• Component center
• Down switch
• G300 (1993) (under left front seat)
• G301 (1988-92) (under right front seat)
• Hot at all times
• Nca
• Pnk
• Pwr acc circuit breaker
• Radio
• Radio on output
• Up switch

POWER DOOR LOCKS

Power Door Lock Wiring Diagram, with Keyless Entry for Buick Regal Custom 1990

List of elements for Power Door Lock Wiring Diagram, with Keyless Entry for Buick Regal Custom 1990:

• (buick & olds)
• (olds & buick)
• (or tan)
• (pont)
• A/t
• Antenna
• Battery
• Component center (right side of i/p)
• Ctsy fuse 15a
• Data encoder
• Data encoder connector (right side of luggage compt)
• Fuse block (right side of i/p)
• G202 (left side of i/p)
• G300 (under left front seat)
• G300 (under left g202 front seat) (left side of i/p)
• Ground
• Hot at all times
• Interior lights system
• Keyless entry module (olds: on top of right rear shelf; pont: right rear of luggage compt, on rear window panel; buick: right front of luggage compt, on rear shelf)
• Left front door lock motor
• Left master switch assembly or left door lock switch
• Left rear door lock motor (4 door)
• Lock
• Lock all doors
• Lock relay
• Lug compt rlse
• Luggage compt release fuse 15a
• M/t
• Park input
• Power acc circuit breaker 30a
• Power door lock relay (right shroud, above center access hole)
• Right front door lock motor
• Right rear door lock motor (4 door)
• Right switch assembly or right door lock switch
• Rs electrical center (right side of engine compartment)
• Tan
• Transaxle position switch (left of transaxle)
• Transmitter input
• Trunk lid release solenoid
• Trunk lid release switch
• Unlck drvr door
• Unlk pass door
• Unlock
• Unlock relay

Power Door Lock Wiring Diagram, without Keyless Entry for Buick Regal Custom 1990

List of elements for Power Door Lock Wiring Diagram, without Keyless Entry for Buick Regal Custom 1990:

• (olds & buick)
• (pontiac)
• Component center (right side of i/p)
• Ctsy fuse 14 15a
• Fuse block (right side of i/p)
• G202 (left side of i/p)
• G300 (under left front seat)
• Hot at all times
• Hot in run
• Left door lock motor
• Left door lock switch (olds only)
• Left master switch assembly or left door lock switch
• Left rear door lock motor (4 door)
• Lock
• Lock relay
• Pnk
• Power door lock relay (right shroud, above center access hole)
• Pwr acc circuit breaker 30a
• Pwr window circuit breaker (olds only) 30a
• Right door lock motor
• Right rear door lock motor (4 door)
• Right switch assembly or right door lock switch
• Unlock
• Unlock indicator (olds only)
• Unlock relay

POWER MIRRORS

Power Mirror Wiring Diagram for Buick Regal Custom 1990

List of elements for Power Mirror Wiring Diagram for Buick Regal Custom 1990:

• Ctsy fuse 15a
• Drive unit
• Fuse block
• G300 (below left front seat)
• Hot at all times
• J/c c200 (behind right side of i/p)
• Left outside mirror
• Left- right m
• Mirror position switch
• Mirror select switch
• Motor
• Nca
• Outside mirror control switch
• Right outside mirror
• Up- down m

POWER SEATS

6-Way Power Seat Wiring Diagram for Buick Regal Custom 1990

List of elements for 6-Way Power Seat Wiring Diagram for Buick Regal Custom 1990:

• (1990-92) (1993)
• (below left
• (below right
• 1993 buick w/ right power seat
• A h
• B g
• Back
• Breaker 30a
• Component center
• D tan
• Down
• Entire seat
• Front height
• Front height motor
• Front seat)
• Fwd
• Fwd/ back motor
• G300
• G301
• H b
• Hot at all times
• Left front seat
• Left seat switch
• Pwr/acc circuit
• Rear height
• Rear height motor
• Right front seat
• Right seat switch
• Tan
• Tan a

POWER WINDOWS

Power Window Wiring Diagram, Coupe for Buick Regal Custom 1990

List of elements for Power Window Wiring Diagram, Coupe for Buick Regal Custom 1990:

• (behind left side of i/p) g202
• Component center
• Down
• Express down
• Express down module
• Hot in run
• Interior lights system
• Led
• Left front
• Left front window motor
• Left master switch assembly
• Pnk
• Power windows circuit breaker 30a
• Right front
• Right front window motor
• Right switch assembly
• Tan

Power Window Wiring Diagram, Sedan for Buick Regal Custom 1990

List of elements for Power Window Wiring Diagram, Sedan for Buick Regal Custom 1990:

• (behind left side of i/p) g202
• Component center
• Down
• Express dn on/off momentary switch
• Express down module
• Hot in run
• Interior lights system
• Led
• Left front window
• Left front window motor
• Left front window switch
• Left rear window
• Left rear window motor
• Left rear window switch
• Pnk
• Power windows circuit breaker 30a
• Right front window
• Right front window motor
• Right front window switch
• Right rear window
• Right rear window motor
• Right rear window switch
• Tan
• W/o sunroof
• W/sunroof

RADIO

Radio Wiring Diagrams, UM6, UX1 or U1C for Buick Regal Custom 1990

List of elements for Radio Wiring Diagrams, UM6, UX1 or U1C for Buick Regal Custom 1990:

• Acc b+ in
• Accb +
• Antenna
• Antenna input
• Assembly line diagnostic link (aldl) connector (right of steering column)
• Bat
• Bat power
• Bat pwr
• Bat pwr output
• Batt power input
• Battery pwr in
• Cancel cam assembly (inside top of steering column)
• Coaxial cable
• Compact disc player cassette/equalizer cassette player
• Data
• Data bus
• Data gnd out
• Data grd input
• Data in
• Data line
• Data out
• Elec fuse 2 15a
• Front speaker connectors (not used)
• Front speakers u66 speaker system
• Front speakers uw6 speaker system
• Fuse block (right side of i/p, in i/p compartment)
• G110 (left front of engine)
• G201 (behind i/p, near right side shroud)
• Ground
• Ground ground
• Ground in
• Hot at all times
• Hot in accy or run
• Ignition input
• Illum
• Illumination
• Interior lights system
• Left front speaker
• Left lower door speaker
• Left rear speaker
• Left upper door speaker
• Lft aud input+
• Lft audio+
• Light on signal
• Lights on feed
• Lights on input
• Lights on sig
• Lt front spkr
• Lt rear spkr
• Nca
• On output
• Panel light
• Pnk
• Power antenna
• Rad mute sig
• Rad power input
• Rad power out
• Radio
• Radio control head
• Radio control interface module
• Radio fuse 1 10a
• Receivers
• Rgt aud input+
• Rgt audio+
• Right front speaker
• Right lower door speaker
• Right rear speaker
• Right upper door speaker
• Rt front spkr
• Rt rear spkr
• Spring loaded
• Switch and electronics module (steering wheel control head)
• Tan
• Tape on sig
• Transmitters
• Turn signal switch (inside top of steering column)
• Vcc +5
• Vf dim input
• Vf pwm ill
• Vf pwm ill input

Radio Wiring Diagrams, UM7 for Buick Regal Custom 1990

List of elements for Radio Wiring Diagrams, UM7 for Buick Regal Custom 1990:

• Antenna
• Assembly line diagnostic link (aldl) connector (right of steering column)
• Batt power input
• Battery input
• Battery power
• Data
• Data ground input
• Data ground output
• Data line
• Elec fuse 2 15a
• Front speaker connectors (not used)
• Front speakers u66 speaker system
• Front speakers uw6 speaker system
• Fuse block (right side of i/p)
• G110 (left front of engine)
• G201 (behind i/p, near right side shroud)
• Ground
• Hot at all times
• Hot in accy or run
• Illum input
• Interior lights system
• Left front speaker
• Left lower door speaker
• Left rear speaker
• Left upper door speaker
• Lft frt channel output
• Lft rear channel output
• Lights on feed
• Lights on input
• Nca
• On/off
• Panel light
• Pnk
• Power antenna
• Power antenna input
• Radio
• Radio control head
• Radio fuse 1 10a
• Radio power input
• Radio power output
• Rgt frt channel output
• Rgt rear channel output
• Right front speaker
• Right lower door speaker
• Right rear speaker
• Right upper door speaker
• Steering wheel radio control system (translator module)
• Tan
• Vf pwm illum input

STARTING/CHARGING

Charging Wiring Diagram for Buick Regal Custom 1990

List of elements for Charging Wiring Diagram for Buick Regal Custom 1990:

• (all others) (electronic cluster)
• (electronic cluster) (all others)
• 1990 3.1l & 1991 3.1l early production
• 3.1l
• 3.8l
• Alt fuse 10a (1990)
• Battery
• C1 c1
• Charge ind (all others)
• Check gages ind (gages cluster)
• D1 d4 c1
• D1o
• Fuse block (right side of dash)
• Fusible link (1991) (rust 12 ga)
• Fusible link (rust)
• G108 (left radiator support)
• G110 (left front of engine)
• Generator
• Hot in run
• Hot in run, bulb test or start
• Ign fuse 10a
• Ign fuse 10a (1991)
• Indic fuse 10a
• Instrument cluster
• Left side electrical center (left side of engine compt)
• Red
• Right side electrical center (right side of engine compt)
• Starter assembly

Starting Wiring Diagram for Buick Regal Custom 1990

List of elements for Starting Wiring Diagram for Buick Regal Custom 1990:

• 3.1l
• Acc
• Battery
• Bulb test
• G108 (left radiator support)
• G110 (left front of engine, below exhaust manifold)
• Hot at all times
• Ignition switch
• Lock
• Off
• Power distribution system
• Run
• Start
• Starter motor
• Starter solenoid
• Transaxle position switch (lower left side of engine compartment, on transaxle)

TRUNK, TAILGATE, FUEL DOOR

Trunk Release Wiring Diagram for Buick Regal Custom 1990

List of elements for Trunk Release Wiring Diagram for Buick Regal Custom 1990:

• 1995 vftc c
• Door locks system (keyless entry)
• Door locks system (keyless entry) (cutlass supreme)
• Hot at all times (grand prix, lumina, regal)
• Hot in run (cutlass supreme)
• Luggage compt release fuse 15a
• Release solenoid
• Release switch
• Rs electrical center (in engine compartment, front of right strut tower)
• Transaxle position switch
• W/ automatic transaxle
• W/ manual transaxle

WIPER/WASHER

2-Speed Wiper/Washer Wiring Diagram for Buick Regal Custom 1990

List of elements for 2-Speed Wiper/Washer Wiring Diagram for Buick Regal Custom 1990:

• (1990-92)
• (1993)
• (left front of engine) g110
• (left strut tower) g102
• E10
• E11
• Fuse block
• Hot in accy or run
• Mechanical arm
• Mist
• Off
• Park switch
• Pnk
• Red
• Washer motor
• Washer switch
• Wiper fuse 25a
• Wiper motor assembly
• Wiper switch
• Wiper switch assembly

Interval Wiper/Washer Wiring Diagram for Buick Regal Custom 1990

List of elements for Interval Wiper/Washer Wiring Diagram for Buick Regal Custom 1990:

• (1990-92)
• (1993) g102
• (left strut tower)
• E10
• E11
• Fuse block
• G110 (left front of engine)
• Hot in accy or run
• Mechanical arm
• Mist
• Off
• Park switch
• Pnk
• Pulse
• Pulse delay
• Red
• Timer
• Washer motor
• Washer switch
• Wiper fuse 25a
• Wiper motor assembly
• Wiper switch
• Wiper/ switch assembly