All Wiring Diagrams for Lexus GS 300 1999 model

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 2) for Lexus GS 300 1999

List of elements for Automatic A/C Wiring Diagram (1 of 2) for Lexus GS 300 1999:

(a/c sub wire harness, behind center of dash) i2
(behind right side of dash) air inlet control servo motor
(cowl wire harness, left front corner of engine compartment) e4
(left fender) g102
(upper right side of dash) g201
A/c control assembly (behind center of dash)
A/c dual pressure switch (at upper left radiator support, integral to a/c triple pressure switch)
A/c room temperature sensor (behind center of dash)
A/c solar sensor (at upper right side of dash)
A/c thermistor (behind center of dash)
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A29
Acc
Acmg
Aif
Air
Air mix control servo motor (driver side) (behind center of dash)
Air vent mode control servo motor (behind right side of dash)
Amcdr
Amcpa
Amhdr
Amhpa
Aod
Aof
B10
B11
B12
B13
B14
B15
B16
B18
Blw
D10
D13
D21
D27
Dgs
Driver side j/b (behind left kick panel)
Ecu-b2 fuse 5a
Engine control module (at left side of engine compartment, in ecu box)
F13
F21
F22
F23
F24
Gnd
Gs 300
Gs 400
Hot at all times
Hot in acc or on
I2 (a/c sub wire harness, behind center of dash)
Ill
Instrument panel j/b (behind upper center of dash)
Interior lights system
J/c 17 (behind upper right side of dash)
J/c 18 (behind right kick panel)
Lcki
Mfrs
Mpx+
Mpx-
Mpx1
Mpx2
Mrec
Multi-display (w/lexus navigation system)
Passenger side j/b (behind right kick panel)
Pre
Radio n0 2 fuse 15a
Red
S5-2
S5-3
S5-4
Sg-1
Sg-3
Sg-4
Sg-5
Tam
Tel in
Telephone transceiver & speaker relay (at right side of luggage compartment)
Tilt & telescopic ecu (behind left side of dash)
Tpdr
Tpi
Tpo
Tppa
Tsdr
Tspa
W/0 lexus navigation system
W/lexus navigation system

Automatic A/C Wiring Diagram (2 of 2) for Lexus GS 300 1999

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List of elements for Automatic A/C Wiring Diagram (2 of 2) for Lexus GS 300 1999:

(canada) i1 (cowl wire harness, behind combination meter)
(gs 400) (engine wire harness, right rear of engine) e1 (gs 300) (engine wire harness, left front of engine)
(gs 400) (left bank of cylinder head) g114 g131 (gs 300) (rear of intake manifold)
(left fender) g102
(upper right side of dash) g201
A/c ambient temperature sensor (near top left side of radiator support)
A/c comp relay
A/c condenser fan motor (in front of left side of radiator)
A/c magnetic clutch & lock sensor (on a/c compressor)
A/c single pressure switch (at upper left radiator support, integral to a/c triple pressure switch)
Air mix control servo motor (front passenger side) (behind right side of dash)
Blower motor (right side of dash)
Blower motor controller (behind right side of dash)
Body ecu 1
Cds fan fuse 30a
Driver side j/b (behind left kick panel)
E4 (usa) (cowl wire harness, left front corner of engine compartment)
Engine room r/b 1 (on right side of engine compartment, behind strut tower)
Engine room r/b 3 (on left side of engine compartment, front of strut tower)
Exhaust gas sensor (at left front of engine compartment)
F12
Fan 1 relay
Fan 2 relay
Fan 3 relay
Gas
Gnd
Heater fuse 10a
Heater fuse 50a
Heater relay
Hot at all times
Hot in on or start
Ign fuse 5a
J/c 13 (behind left side of dash)
J/c 14 (behind left side of dash)
J/c 17 (upper right side of dash)
J/c 2 (in ecu box)
Meter) g202 g102 (usa) (left fender)
Passenger side j/b (behind right kick panel)
Passenger side r/b (behind right kick panel)
Radiator fan motor (left front of eng compt)
Rdi fan fuse 30a
Red
Water temperature switch (at front of engine compartment, behind left side of grille)

ANTI-LOCK BRAKES

Anti-lock Brake Wiring Diagrams (1 of 3) for Lexus GS 300 1999

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List of elements for Anti-lock Brake Wiring Diagrams (1 of 3) for Lexus GS 300 1999:

(under abs/ trac/ vsc actuator)
A10
A11
A12
A19
A22
Abs & trac & vsc actuator (at left rear corner of engine compartment)
Abs & trac & vsc ecu (behind left side of dash)
Abs 1 fuse 60a
Abs 2 fuse 40a
Abs motor relay
Abs sol relay
Ast
Braided
Engine room r/b 1 (on right side of engine compt, behind strut tower)
Engine room r/b 2 (on left side of engine compt, behind strut tower)
Fl+
Fl-
Fr+
Fr-
Fss
G103 (right front strut tower)
G116
G116 (under abs/ trac/ vsc actuator)
G200
Grd1
Grd2
Hot at all times
Junction connector j/c 5 (left rear corner of engine compartment)
Junction connector j/c 6 (left kick panel)
Mr1
Mr2
Mt+
Mt-
Mtt
Pmc
Pnk
R1+
R2+
Red
Sa1
Sa2
Sa3
Sflh
Sflr
Sfrh
Sfrr
Srlh
Srlr
Srrh
Srrr
Str
Trac motor relay
Vcm

Anti-lock Brake Wiring Diagrams (2 of 3) for Lexus GS 300 1999

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List of elements for Anti-lock Brake Wiring Diagrams (2 of 3) for Lexus GS 300 1999:

(1998-99)
(2000)
(at left side of engine compt, behind ecu box) data link connector 1
(behind left side of dash) data link connector 3
(upper right end of dash) junction connector j/c 17
A19
Body ecu 2
Braided
Brake fluid level warning switch (in brake fluid reservoir)
C (or b)
Driver side j/b (behind left kick panel)
Driver side j/c (behind left kick panel)
Ecu-ig fuse 15a
G102 (usa) (left front strut tower)
G200
G201 (upper right side of dash)
G202
Hot at all times
Hot in run or start
Junction connector j/c 1 (under ecu box)
Junction connector j/c 10 (upper left end of dash)
Junction connector j/c 15 (behind combination meter)
Junction connector j/c 3, j/c 4 (under ecu box)
Junction connector j/c 6 (left kick panel)
Junction connector j/c 7 (left kick panel)
Junction connector j/c 9 (upper left end of dash)
Left front abs speed sensor (left front wheel assembly)
Master cylinder pressure sensor (at left rear corner of engine compartment)
Park/neutral position switch (on transmission)
Pnk
Red
Right front abs speed sensor (right front wheel assembly)
Steering sensor (combination switch)
Stop fuse 15a
Stoplight switch (on brake pedal bracket)
Vsc off switch
Vsc warning buzzer (behind left side of dash)

Anti-lock Brake Wiring Diagrams (3 of 3) for Lexus GS 300 1999

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List of elements for Anti-lock Brake Wiring Diagrams (3 of 3) for Lexus GS 300 1999:

(3.0l)
(4.0l)
(upper left end of dash) junction connector j/c 9
(upper right end of dash) junction connector j/c 17
A20
A21
Abs & trac & vsc ecu (behind left side of dash)
Abs deceleration sensor (under rear of center console)
Abs indic
B11
B13
B14
B15
B16
B17
Braided
Brake indic
Brl
Combination meter
Csw
D/g
Driver side j/b (bhind left kick panel)
Eng+
Eng-
Engine control module (at left side of engine compt, in ecu box)
Flo
Gauge fuse 10a
Ggrd
Gl1
Gl2
Grd3
Grd4
Gss
Gyaw
Headlights system
Hot in start or run
Ig1
Ig2
Ign fuse 5a
Ind
Junction connector j/c 14 (behind comb- ination meter)
Left rear abs speed sensor (left rear wheel assembly)
Neo
Pnk
Red
Right rear abs speed sensor (right rear wheel assembly)
Rl+
Rl-
Rr+
Rr-
Slip indic
Sp1
Ss1+
Ss1-
Stp
Trc+
Trc-
Vgs
Vsc indic
Vsc off indic
Vscw
Vys
Yaw
Yaw rate sensor (under rear of center console)
Yss

ANTI-THEFT

Anti-theft Wiring Diagram (1 of 3) for Lexus GS 300 1999

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List of elements for Anti-theft Wiring Diagram (1 of 3) for Lexus GS 300 1999:

(dash harn, right side of dash)
A13
A15
A17
A19
B14
B15
Bdr
Becu
Body ecu 2
C12
C18
Computer data lines system
Cpub
Cty
Ctye
D fr door fuse 20a
D rr door fuse 20a
Driver door ecu (in driver's door)
Driver side junction block (behind left kick panel)
Ecu-ig fuse 15a
Exterior lights system
G200
Grd
Gswo
H10
H11
H13
Headlights system
Hot at all times
Hot in accy or run
Hot in run or start
Hrly
Ile
Interior lights system
Junction connector j/c 10 (behind left side of dash)
Junction connector j/c 13 (behind left side of dash)
Junction connector j/c 6 (left kick panel)
Junction connector j/c 7 (left kick panel)
Junction connector j/c 8 (behind left kick panel)
Kul
Left door lock control switch (power window master switch)
Left front door courtesy switch
Left front door lock motor, door key lock & unlock switch & door lock detection switch
Lock
Lock detect
Lsw
Lswe
Mpx1
Mpx2
Mul
Pwe
Radio 2 fuse 15a
Sig
Trly
Unlk

Anti-theft Wiring Diagram (2 of 3) for Lexus GS 300 1999

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List of elements for Anti-theft Wiring Diagram (2 of 3) for Lexus GS 300 1999:

Bdr
Cpub
Cty
Ctye
Diode (luggage compartment door open detection) (at left side of luggage compt)
Engine hood courtesy switch
Engine room relay block 1 (on right side of engine compt, behind strut tower)
G102 (left front strut tower)
G311 (center of rear shelf)
G904
G904 (under left c-pillar)
G905
Grd
Hot at all times
Junction connector j/c 20 (left quarter panel)
Junction connector j/c 22 (under right c-pillar)
Left rear door courtesy switch
Left rear door ecu (in left rear door)
Left rear door lock motor & door lock detection switch
Lock detect
Lsw
Lswe
Luggage compartment door courtesy switch & opener motor
Luggage compartment door key unlock switch
Mpx-b fuse 10a
Mpx1
Mpx2
Power seat ecu (under driver's seat)
Right rear door courtesy switch
Right rear door ecu (in right rear door)
Right rear door lock motor & door lock detection switch
Sig
W/ memory seats
W/o memory seats

Anti-theft Wiring Diagram (3 of 3) for Lexus GS 300 1999

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List of elements for Anti-theft Wiring Diagram (3 of 3) for Lexus GS 300 1999:

(at right side of luggage compartment) wireless door lock ecu
(left rear corner of engine compt) wireless door lock buzzer
(under right c-pillar) junction connector j/c 22
A10
A12
A13
A15
A16
A18
A19
A22
A25
Acc
B14
B15
Bdr
Becu
Body ecu 1
Bsub
Bzr
Bzr2
C12
C15
C16
C17
Combination meter
Computer data lines system
Cpub
Cty
Ctye
Dle
Dome fuse 10a
Engine control system
Exterior lights system
F11
Front passenger door ecu (in passenger's door)
G200
G201 (upper right side of dash)
G905
Grd
Gsw
H11
H13
Haz
Hcty
Horn
Horns system
Hot at all times
Ind
Junction conenctor j/c 6 (left kick panel)
Junction connector j/c 14 (behind left side of dash)
Junction connector j/c 15 (behind left side of dash)
Junction connector j/c 17 (upper right end of dash)
Kul
Lgcy
Lock
Lock detect
Lsw
Lswe
Mpx1
Mpx2
Mul
P fr door fuse 20a
P rr door fuse 20a
Passenger side junction block (behind lower right end of dash)
Passenger side junction block (behind right kick panel)
Pnk
Pws
Rco
Rda
Right front door courtesy switch
Right front door lock control switch
Right front door lock motor, door key lock & unlock switch & door lock detection switch
Rssi
Security indicator (rheostat)
Sig
Theft deterrent horn (at right front of engine compt)
Tkul
Tr+
Unlk

BODY COMPUTER

Body Computer Wiring Diagrams (1 of 2) for Lexus GS 300 1999

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List of elements for Body Computer Wiring Diagrams (1 of 2) for Lexus GS 300 1999:

(left kick panel) junction connector j/c 7
3.0l
4.0l
A/c control assembly (behind center of dash)
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
Acan
Altl
Auto
Automatic light control sensor
B11
Becu
Blvl
Body ecu 2 (in driver side j/b)
Brake fluid level warning switch (in brake fluid reservoir)
C13
Canada
Center air bag sensor assembly
Clock
Cltb
Clte
Clts
Combination meter
D27
D28
Daytime running light relay (main)
Dbkl
Driver side j/b (behind left kick panel)
Ecu-ig fuse 15a
Engine control module (at left side of engine compt, in ecu box)
F11
F24
Ffgo
Ffog
Fog relay
Foglight switch
G102 (left front strut tower)
G200
G202 (upper left side of dash)
Grd
Gsw
Gswo
H11
H13
Head
Head lp relay
Headlight switch
Hot in run or start
Hrly
Ile
Interior lights
Junction connector j/c 15 (left side of dash)
Junction connector j/c 6 (left kick panel)
Junction connector j/c 9 (upper left end of dash)
Ksw
Lamp failure module
Left buckle switch
Mirb
Mire
Mirs
Mpx
Mpx+
Mpx-
Mpx1
Mpx2
Multi-display
Not used
Red
Remote control mirror switch
Shift lock control ecu
Slck
Stoplight switch
Stpi
Tail
Tail relay
Tilt & telescopic ecu (behind left side of dash)
Trly
Unlock warning switch (behind left side of dash)
Usa
W/ navigation
W/o navigation

Body Computer Wiring Diagrams (2 of 2) for Lexus GS 300 1999

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List of elements for Body Computer Wiring Diagrams (2 of 2) for Lexus GS 300 1999:

A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
Acc
Becu
Body ecu 1 (in passenger side j/b)
Bsub
Bzr
Bzr2
Cpub
D24
Data link connector 3
Dfg
Driver door ecu (in driver's door)
Driver side j/b (behind left kick panel)
Engine hood courtesy switch
Engine room r/b 1 (on right side of engine compt, behind strut tower)
F11
F12
Front passenger door ecu (in right front door)
G201 (upper right side of dash)
Grd
Gsw
H10
H11
H13
Haz
Hazard switch
Hcty
Horn
Horn relay
Hot at all times
Hot in acc or run
Htr relay
I6 (dash harn, right side of dash)
Ind
Junction connector j/c 13 (left side of dash)
Left rear door ecu (in left rear door)
Lgcy
Luggage compartment door courtesy switch
Luggage compartment door key unlock switch
Luggage compartment door opener switch
Luggage compartment opener motor
Mir relay
Mirror retraction switch
Moon roof control ecu
Mpx-b fuse 10a
Mpx1
Mpx2
Not used
Obd2
P fr door fuse 20a
P19
Parking brake switch (behind left side of dash)
Passenger side j/b (behind right kick panel)
Pbkl
Pkb
Pnk
Power seat ecu (under driver's seat)
Power window master switch
Pwr
Pws
R12
R13
Radio 2 fuse 15a
Rco
Rda
Ret
Right front door lock switch
Right rear door ecu (in right rear door)
Rssi
Seat
Seat belt warning occupant detection sensor
Security indicator
Snow
Theft deterrent horn
Tkul
Tr+
Transmission pattern select switch
Tsw
W/ memory
W/o memory
Wireless door lock buzzer
Wireless door lock ecu

COMPUTER DATA LINES

Computer Data Lines for Lexus GS 300 1999

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List of elements for Computer Data Lines for Lexus GS 300 1999:

(3.0l)
(4.0l)
(front side of intake manifold) (3.0l) g131
(in ecu box) j/c 2
(on right cylinder head) g120 (4.0l)
3.0l
4.0l
A/c control assembly
A12
A16
A20
A21
Abs & trac & vsc ecu (behind left side of dash)
Anti-lock brake system (abs sol relay)
B11
B12
B16
Bat
Body ecu 1
Body ecu 2
Center air bag sensor assembly (behind center of dash)
Combination meter
D/g
D24
Data link connector 1 (left side of engine compt)
Data link connector 3 (behind left side of dash)
Driver door ecu
Driver side j/b
Engine control module (left side of engine compt)
Engine controls system (efi relay)
F11
F13
Front passenger door ecu
G112 (4.0l) (on left cylinder head)
G131 (3.0l) (front of intake manifold)
G201 (upper right side of dash)
H11
H12
Heated oxygen sensor (bank 1, sensor 1) (on right side of engine)
Hot at all times
Ig-
Ignitor (left rear of engine compt)
J/c 1 (in ecu box)
J/c 10 (left side of dash)
J/c 14 (behind left side of dash)
J/c 9 (behind left side of dash)
Left rear door ecu
Moon roof control ecu (front of moon roof opening)
Mpx+
Mpx-
Mpx1
Mpx2
Multi-display
Nca
Obd fuse 7.5a
Obd2
Ox1
Ox1a
P19
Passenger side j/b
Pnk
Power seat ecu (under driver's seat)
Right rear door ecu
Short pin
Sil
Tac
Tach
Tilt & telescopic ecu (behind left side of dash)
W/ memory
W/ navigation
W/o memory
W/o navigation

COOLING FAN

Cooling Fan Wiring Diagram for Lexus GS 300 1999

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List of elements for Cooling Fan Wiring Diagram for Lexus GS 300 1999:

A/c comp relay
A/c condenser fan motor (in front of left side of radiator)
A/c single pressure switch (at upper left radiator support)
Acmg
Air conditioning system
Cds fan fuse 30a
Driver side j/b (behind left kick panel)
E4 (usa) (engine harness, under ecu box)
Engine control module (at left side of engine compt, in ecu box)
Engine main relay
Engine room r/b (on right side of engine compt, behind strut tower)
Engine room r/b 3 (on left side of engine compt, front of strut tower)
Fan 1 relay
Fan 2 relay
Fan 3 relay
Fan main fuse 50a
G102 (left front strut tower)
G102 (usa) (left front strut tower)
G116 (under abs/trac/ vsc actuator)
G202 (canada) (upper left side of dash)
Heater fuse 10a
Hot at all times
Hot in run or start
Htr relay
I1 (canada) (dash harness, behind combination meter)
Ign fuse 5a
J/c 13 (behind upper left side of dash)
J/c 14 (behind upper left side of dash)
J/c 5 (left rear corner of engine compt)
Passenger side j/b (behind right kick panel)
Radiator fan motor (at left front engine compt)
Rdi fan fuse 30a
Red
Under ecu box)
Water temperature switch (at front of engine compt, behind left side of grille)

CRUISE CONTROL

Cruise Control Wiring Diagram for Lexus GS 300 1999

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List of elements for Cruise Control Wiring Diagram for Lexus GS 300 1999:

(behind ecu box)
(engine harn, left side of engine)
(engine harn, top left side of engine)
(in ecu box)
(left cylinder head)
(left kick panel) j/6 c
(right cylinder head)
+b1
+bm
A/t indicator light switch
Accel position sensor (top center of engine)
Batt
Braided
C12
C13
Cancel
Ccs
Cl+
Cl-
Combination meter
Computer data lines system
Cpu
Cruise control switch
Cruise ind
Data link connector 1
Driver side j/b
Driver side junction block
E01
E02
E03
Efi fuse 25a
Efi relay
Engine control module (left side of engine compt, in ecu box)
Engine room relay block 1
Eom
Etcs fuse 15a
G102 (left front strut tower)
G104 (left rear corner of engine compt)
G112
G112 (left cylinder head)
G120
G200
Gauge fuse 10a
Ge01
Hot at all times
Hot in on or start
Ign fuse 5a
Igsw
J/c 1 (in ecu box)
J/c 11 (left side of dash)
J/c 14 (behind left side of dash)
J/c 17 (behind right side of dash)
J/c 2 (in ecu box)
J/c 3
J/c 3 (in ecu box)
J/c 5 (in engine room relay block 2)
J/c 7 (behind left kick panel)
J/c 9 (behind left side of dash)
J/c4
Main
Me01
Mpx2
Mrel
Pnk
Res/ acc
Set/ coast
Sti-
Stop fuse 15a
Stoplight switch (on brake pedal bracket)
Stp
Throttle control motor (on throttle body)
Throttle position sensor (on throttle body)
Vpa
Vpa2
Vta
Vta2

DEFOGGERS

Heated Mirrors Wiring Diagram for Lexus GS 300 1999

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List of elements for Heated Mirrors Wiring Diagram for Lexus GS 300 1999:

(behind right kick panel) passenger side junction block
(left kick panel) j/c 6
(upper right side of dash) g201
3.0l
4.0l
A/c control assembly (behind center of dash)
A12
A13
A19
Alt fuse 120a
Body ecu 1
D27
D28
Driver side junction block (behind left kick panel)
Engine control module (at left side of engine compartment, in ecu box)
Engine room relay block 1 (on right side of engine compt, behind strut tower)
F11
F13
F24
G200
G201 (upper right side of dash)
H10
Heater fuse 10a
Hot at all times
Hot in on or start
J/c 13 (behind left side of dash)
J/c 17 (upper right side of dash)
Left remote control mirror heater
Mir htr fuse 10a
Mir htr relay
Multi display (center of dash)
Right remote control mirror heater
W/ driving position memory
W/o driving position memory

Rear Defogger Wiring Diagram for Lexus GS 300 1999

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List of elements for Rear Defogger Wiring Diagram for Lexus GS 300 1999:

3.0l
4.0l
A/c control assembly (behind center of dash)
A13
A19
Body ecu 1
D27
D28
Def relay (in passenger side relay block)
Defog fuse 30a
Driver side junction block (behind left kick panel)
Engine control module (at left side of engine compartment, in ecu box)
F11
F24
G201 (upper right side of dash)
Heater fuse 10a
Hot at all times
Hot in on or start
J/c 13 (behind left side of dash)
Multi display (center of dash)
Noise filter
Passenger side junction block (behind right kick panel)
Rear window defogger
Red

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Lexus GS 300 1999

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List of elements for Electronic Power Steering Wiring Diagram for Lexus GS 300 1999:

3.0l
4.0l/4.3l
C12
C13
Combination meter
Driver side j/b (behind left kick panel)
Ecu-ig fuse 15a
F13
G200
G201 (upper right side of dash)
Gauge fuse 10a
Hot in on or start
J/c 10 (upper left end of dash)
J/c 13 (left side of dash)
J/c 17 (upper right end of dash)
J/c 6 (left kick panel)
J/c 7 (left kick panel)
Pps ecu (behind left side of dash)
Pps solenoid (at left front of engine)
Pps solenoid (at right front of engine)
Sol+
Sol-
Spd

Power Steering Column Wiring Diagram for Lexus GS 300 1999

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List of elements for Power Steering Column Wiring Diagram for Lexus GS 300 1999:

(dash harn, right side of dash) i6
Acc
Bdr
Becu
Body ecu 1
Body ecu 2
Combination switch
Computer data lines system
Cpub
D fr door fuse 20a
D22
D24
Driver door ecu (in driver's door)
Driver side j/b (behind left kick panel)
Ecu-ig fuse 15a
Ecub
Ecue
Engine room r/b 1 (right side of engine compt, behind strut tower)
F11
F13
G200
Gnd
Gsw
Gswo
H10
H11
Hot at all times
Hot in accy or run
J/c 10 (left side of dash)
J/c 13 (left side of dash)
J/c 15 (behind left side of dash)
J/c 6 (behind left kick panel)
J/c 7 (behind left kick panel)
Mpx-b fuse 10a
Mpx1
Mpx2
Msw
P p/seat fuse 30a
Passenger side j/b (behind right kick panel)
Power telescopic motor
Power tilt motor
Radio 2 fuse 15a
Sig
Telesco long
Telesco short
Tem+
Tem-
Tilt & telescopic ecu (behind left side of dash)
Tilt & telescopic switch
Tilt down
Tilt up
Tim+
Tim-

ENGINE PERFORMANCE

3.0L

3.0L, Engine Performance Wiring Diagrams (1 of 4) for Lexus GS 300 1999

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List of elements for 3.0L, Engine Performance Wiring Diagrams (1 of 4) for Lexus GS 300 1999:

(behind left side of dash)
(engine harn, in ecu box)
(engine harn, left side of engine)
(front of left front fender)
(front side of intake manifold)
(left front of engine) engine oil level sensor
(rear side of intake manifold)
(top left side of engine) camshaft timing oil control valve
A braided
Acis
Air conditioning system
Braided
Camshaft position sensor (top center rear of engine)
Canada
Cl+
Cl-
Conn e2
Conn e3
Crankshaft position sensor (left front of engine)
E01
E02
E03
E2g
Engine control module (left side of engine compt, in ecu box)
Evg
G100
G131
G131 (rear side of intake manifold)
G202
Ge01
Generator
Grd
Ht1a
Ht2a
Igf
Igniter (on left front shock tower)
Ignition coil 1
Ignition coil 2
Ignition coil 3
Igt
Igt2
Igt3
In1
In2
In3
Injector 1
Injector 2
Injector 3
Injector 4
Injector 5
Injector 6
Instrument cluster system (tachometer)
J/c 2 (in ecu box)
Knk1
Knk2
Knock sensor 1 (left front of engine)
Knock sensor 2 (left side of engine)
Lcki
Mass airflow meter (in air intake duct)
Me01
Mol
Mops
Ne+
Ne-
Noise filter (top left front of engine)
Ocv+
Ocv-
Oil level
Oil pressure switch (left front side of engine)
Oil temp
Ox1a
Ox2a
Power steering oil pressure switch (left rear of engine compt)
Prg
Red
Tac
Tha
Throttle control motor (on throttle body)
Thw
Usa
Vpa
Vpa2
Vsv (acis) (left rear side of engine)
Vsv (evap) (top rear of engine)
Vta
Vta2

3.0L, Engine Performance Wiring Diagrams (2 of 4) for Lexus GS 300 1999

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List of elements for 3.0L, Engine Performance Wiring Diagrams (2 of 4) for Lexus GS 300 1999:

(body harness, forward of left rear wheelwell)
(engine harn, e2
(left side of dash)
A j/c 4
Acc
Accel position sensor (rear left side of engine)
Am2
Braided
Driver side junction block
Efi fuse 25a
Efi relay
Engine coolant temperature sensor (top left front of engine)
Engine room relay block 1
F10
Fp+
Fp-
Fpc
Fuel pump (in fuel tank)
Fuel pump control ecu (left side of luggage compartment)
G104 (left rear corner of engine compt)
G131 (rear side of intake manifold)
Heated oxygen sensor (bank 1 sensor 1) (on left side of engine, in exhaust manifold)
Heated oxygen sensor (bank 2 sensor 1) (on right side of engine, in exhaust manifold)
Hot at all times
Ig2
Ign fuse 5a
Ignition switch
J/c 14 (behind left side of dash)
J/c 15 (behind left side of dash)
J/c 2 (behind right side of dash)
J/c 20 (left quarter panel)
J/c 3
J/c 5 (in engine room relay block 2)
Left side of engine)
Lock
P/n
Park/neutral position switch (on transaxle)
Red
St2
Start
Starter fuse 5a
Starting/ charging system
Throttle position sensor (on throttle body)

3.0L, Engine Performance Wiring Diagrams (3 of 4) for Lexus GS 300 1999

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List of elements for 3.0L, Engine Performance Wiring Diagrams (3 of 4) for Lexus GS 300 1999:

(behind center of dash) a/c control assembly
(behind left side of dash)
(behind right side of dash)
(in ecu box)
(under center console) shift lock control ecu
A/t indicator light switch (integral to park/neutral position switch) (on transmission)
A/t p
At4
Atl
B j/c 4
Body ecu 1 (in passenger side junction block)
Braided
Braided f
C12
Combination meter
Cpu
Driver side junction block
E braided
E j/c 4
E2 (engine harn, left side of engine)
Ect pwr
Ect snow
Electronically controlled transmission pattern select switch
Except navigation
G131 (front side of intake manifold)
G201
Gauge fuse 10a
H12
Heated oxygen sensor (bank 1 sensor 2) (on exhaust system, near catalytic converter)
Heated oxygen sensor (bank 2 sensor 2) (on exhaust system, near catalytic converter)
Hot at all times
Hot in on or start
J/c 1 (in ecu box)
J/c 11 (behind left side of dash)
J/c 17 (behind right side of dash)
J/c 3
J/c 3 (in ecu box)
J/c 4
J/c 6 (left kick panel)
J/c 7 (behind left kick panel)
J/c 9 (behind left side of dash)
Malfunction indicator light
Mpx+
Mpx-
Mpx1
Mpx2
Multi- display
Navigation
Nssd
Nssl
Obd fuse 7.5a
Ptnk
Pwr
Red
Snow
Stop fuse 15a
Stoplight switch (on brake pedal bracket)
Tilt & telescopic ecu (left side of dash)
Vapor pressure sensor (under left rear of vehicle)
Vcc

3.0L, Engine Performance Wiring Diagrams (4 of 4) for Lexus GS 300 1999

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List of elements for 3.0L, Engine Performance Wiring Diagrams (4 of 4) for Lexus GS 300 1999:

(behind ecu box) data link connector 1
(behind left side of dash) data link connector 3
(behind right side of dash)
(on transmission) o/d direct clutch speed sensor
(or pnk) (or pnk) (or pnk)
(unused pins not shown)
Abs & trac & vsc ecu (behind left side of dash)
Acmg
Air conditioning system
Anti-theft system (security indicator)
Bat
Batt
Braided
Ccs
Code
Conn e4
Conn e5
Conn e6
Conn e7
Cruise control system
Electronically controlled transmission solenoid (in transmission)
Eng+
Eng-
Engine control module (left side of engine compt, in ecu box)
Engine room relay block 1
Eng_
Eom
Etcs fuse 15a
F13
Fpc
G100 (front of left front fender)
G131 (rear side of intake manifold)
G201
G201 (behind right side of dash)
Grd
Hot at all times
Ht1b
Ht2b
Igsw
Imld
J/c 10 (behind left side of dash)
J/c 2 (in ecu box)
J/c 6 (left kick panel)
J/c 9 (behind left side of dash)
Ksw
Mpx1
Mpx2
Mrel
Nco+
Nco-
Neo
Oil
Ox1b
Ox2b
Passenger side junction block
Pnk
Pre
Ptnk
Red
Rxck
Sil
Sln+
Sln-
Slt+
Slt-
Slu+
Slu-
Sp2+
Sp2-
Sta
Sti-
Stp
Tam
Tpc
Transponder key amplifier (behind left side of dash)
Trc+
Trc-
Txct
Unlock warning switch (behind left side of dash)
Vehicle speed sensor (on transmission)
Vsv (vapor pressure sensor) (under left rear of vehicle)

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for Lexus GS 300 1999

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List of elements for Back-up Lamps Wiring Diagram for Lexus GS 300 1999:

(1999)
(2000)
(3.0l)
(4.0l)
B4 (body harn, rear of left rear wheelwell)
Back- up
Driver side j/b (behind left kick panel)
G402
Gauge fuse 10a
Hot in run or start
Junction connector j/c 1 (in ecu box)
Junction connector j/c 17 (upper right end of dash)
Junction connector j/c 19 (above left rear wheelwell)
Junction connector j/c 20 (above left rear wheelwell)
Junction connector j/c 3 & 4 (in ecu box)
Left rear combination light (inner)
Park/neutral position switch (on transmission)
Red
Right rear combination light (inner)

Exterior Lamps Wiring Diagram (1 of 2) for Lexus GS 300 1999

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List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Lexus GS 300 1999:

(above left rear wheelwell) junction connector j/c 19
(body harn, rear of left rear wheelwell)
(in driver's door) driver door ecu
(left front strut tower)
Auto
Automatic light control sensor (behind upper left side of dash)
Bdr
Becu
Body ecu 2 (in driver side j/b)
Cltb
Clte
Clts
Computer data lines system
Cpub
Cty
Ctye
D fr door fuse 20a
D22
D23
D24
Driver side j/b (behind left kick panel)
E4 (engine harn, under ecu box)
Ecu-ig fuse 15a
Engine room r/b 1 (on right side of engine compt, behind strut tower)
G102
G103 (right front strut tower)
G200
G4 g4 g4 g4 g4
G402
Grd
Gswo
H11
H13
Head
Headlight switch
Headlights system
Hot at all times
Hot in run or start
Hrly
I5 (dash harn, right side of dash)
I6 (dash harn, right side of dash)
Junction connector j/c 14 (left side of dash)
Junction connector j/c 19 (above left rear wheel- well)
Junction connector j/c 20 (left rear wheelwell)
Junction connector j/c 6 (left kick panel)
Junction connector j/c 7 (left kick panel)
Left front door courtesy switch
Left front side marker light
Left license plate light
Left parking light
Mpx-b fuse 10a
Mpx1
Mpx2
Off
Passenger side j/b (behind right kick panel)
Red
Right front side marker light
Right license plate light
Right parking light
Sig
Stop fuse 15a
Stoplight switch (brake pedal bracket)
Tail
Trly

Exterior Lamps Wiring Diagram (2 of 2) for Lexus GS 300 1999

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List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Lexus GS 300 1999:

(above left rear wheelwell) junction connector j/c 19
(behind right kick panel) passenger side j/b
(dash harn, right side of dash)
(engine harn, under ecu box)
(left front of trunk) b5
(left kick panel)
(left kick panel) g200
(rear of left rear wheelwell) b4
A22
Alt fuse 120a
B11
Body ecu 1 (passenger side j/b)
Brake lts
C12
C13
Combination meter
D10
Driver side j/b (behind left kick panel)
E11
Ehw
Engine room relay block 1 (on right side of engine compt, behind strut tower)
G102 (left front strut tower)
G103 (right front strut tower)
G200
G402
Gauge fuse 10a
Grd
Haz
Hazard switch
Hi mount
High mounted stoplight (w/ rear spoiler)
High mounted stoplight (w/o rear spoiler)
Hot at all times
Hot in run or start
Junction connector j/c 12 (left side of dash)
Junction connector j/c 17 (upper right end of dash)
Junction connector j/c 20 (above left rear wheel- well)
Left
Left & right rear combination lights (inner)
Left front turn signal light
Left rear combination light (outer)
Left turn indic
Light failure sensor (at left side of luggage compartment)
Markr
Mpx2
Noise filter (high mounted stoplight) (at left front corner of luggage compt)
Power
Right
Right front turn signal light
Right rear combination light (outer)
Right turn indic
Side marker
Stop
Stop sw
Stp
Tail
Tail fuse 10a
Tail lts
Tail relay
Taillt pwr
Turn
Turn signal flasher (behind left side of dash)
Turn signal light switch
Turn-haz fuse 10a
Wrn

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 4) for Lexus GS 300 1999

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List of elements for Ground Distribution Wiring Diagram (1 of 4) for Lexus GS 300 1999:

(3.0l)
(4.0l)
(engine harn, top front of engine)
(front side of intake mainfold)
(on left cylinder head)
(w/ hid)
(w/o hid)
A/c lock sensor
Abs & trac & vsc actuator
Abs sol relay
Cruise control switch
Data link connector 1
Data link connector 3
E1 (4.0l) (top rear of engine)
Efi relay
Engine control module
Engine main relay
Engine oil level sensor
Engine room relay block 1 (on right side of engine compt, behind strut tower)
Engine room relay block 2 (on right side of engine compt, behind strut tower)
G103 (right front strut tower)
G112
G116 (under abs/ trac/vsc actuator)
G120 (on right cylinder head)
G131
G131 (front side of intake manifold)
Heated oxygen sensor (bank 1, sensor 1)
Heated oxygen sensor (bank 1, sensor 2)
Heated oxygen sensor (bank 2, sensor 1)
Heated oxygen sensor (bank 2, sensor 2)
I5 (dash harn, right side of dash)
Igniter
Ignition coil & igniter 1
Ignition coil & igniter 2
Ignition coil & igniter 3
Ignition coil & igniter 4
Ignition coil & igniter 5
Ignition coil & igniter 6
Ignition coil & igniter 7
Ignition coil & igniter 8
Junction connector j/c 2 (under ecu box)
Junction connector j/c 4 (in ecu box)
Junction connector j/c 5 (in engine room r/b 2)
Junction connector j/c 9 (behind left side of dash)
Nca
Right front fog- light
Right front side marker light
Right front turn signal light
Right headlight control ecu
Right low beam headlight
Right parking light
Starter relay

Ground Distribution Wiring Diagram (2 of 4) for Lexus GS 300 1999

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List of elements for Ground Distribution Wiring Diagram (2 of 4) for Lexus GS 300 1999:

(3.0l)
(canada)
(dash harn, behind combination meter)
(engine harn, under ecu box)
(on left side of engine compt, front of strut tower) engine room relay block 3
(usa)
(w/ hid)
(w/o hid)
A/c dual pressure switch
A13
A19
Abs & trac & vsc ecu
Brake fluid level warning switch
C13
Center airbag sensor assembly
Combination meter
D24
Data link connector 3
Daytime running light relay 3
Daytime running light relay 4
Daytime running light resistor (or short connector)
Dimmer switch
Driver's door ecu
E4 (engine harn, under ecu box)
Engine control module
Engine hood courtesy switch
Exhaust gas sensor
Fan 2 relay
Fan 3 relay
Front wiper & washer switch
Front wiper motor
G102 (left front strut tower)
G200
Headlight beam level control ecu
Headlight cleaner control relay
Headlight cleaner motor
High beam indicator light
Junction connector j/c 10 (behind left side of dash)
Junction connector j/c 11 (behind left side of dash)
Junction connector j/c 6 (left kick panel)
Key interlock solenoid
Left front fog- light
Left front side marker light
Left front turn signal light
Left head- light control ecu
Left low beam headlight
Left mirror heater
Left parking light
Light control switch
Luggage compartment door opener switch
Main daytime running light relay
Pnk
Power steering oil pressure switch
Pps ecu
Radiator fan motor
Seat heater switch
Steering sensor
Tilt & telescopic ecu
To driver side junction block (diagram 3 of 4)
To passenger side junction block (diagram 3 of 4)
Transponder key amplifier
Turn signal flasher
Turn signal switch
W/ memory
W/o memory
Washer level warning switch
Water temperature switch

Ground Distribution Wiring Diagram (3 of 4) for Lexus GS 300 1999

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List of elements for Ground Distribution Wiring Diagram (3 of 4) for Lexus GS 300 1999:

(canada 3.0l)
(canada)
(dash harn, right side of dash) i6
(except nakamichi)
(nakamichi)
(on left side of engine compt, front of strut tower) engine room relay block 3
(right side of instrument panel brace)
A/c control assembly
A13
A20
A22
Abs & trac & vsc ecu
B2 (body harn, top of right "a" pillar)
Blower motor controller
Body ecu 1
Body ecu 2
Brake fluid level warning switch
Cd automatic changer
Center airbag sensor assembly
Cigarette lighter
Clock
Combination meter
D/a converter
Driver's side junction block (behind lower left end of dash)
Electronically controlled transmission pattern select switch
F11
F13
Fan 2 relay
Fan 3 relay
From g200 (diagram 2 of 4)
From junction connector j/c 10 (diagram 2 of 4)
Front passenger door ecu
Front wiper motor
G201 (upper right side of dash)
G202 (upper left side of dash)
G302
Garage door opener
Glove box light switch
Hazard switch
Htr relay
I1 (dash harn, behind combination meter)
Ig relay
Inner mirror
Instrument panel junction block (behind upper center of dash)
Junction connector j/c 17 (upper right end of dash)
Left rear interior light
Left vanity light
Mirror retraction switch
Moon roof control ecu
Moon roof control switch
Multi- display
Noise filter
Passenger side junction block (behind lower right end of dash)
Passenger's side relay block (behind lower right end of dash)
Personal light
Power outlet
Power steering oil pressure switch
Radio & player
Right mirror heater
Right rear interior light
Right vanity light
Shift lock control ecu
Stereo component amplifier
Vsc off switch
W/ memory
W/o memory

Ground Distribution Wiring Diagram (4 of 4) for Lexus GS 300 1999

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List of elements for Ground Distribution Wiring Diagram (4 of 4) for Lexus GS 300 1999:

(body harness, rear of left rear wheelwell)
(nakamichi)
(w/ memory)
(w/o memory)
Auto antenna control relay & motor
B6 (body harness, under driver's seat)
Bulb
C18
Cellular phone handset
Driver's seat back heater
Driver's seat control switch
Driver's seat front vertical position sensor
Driver's seat lumbar control switch
Driver's seat rear vertical position sensor
Driver's seat recline position sensor
Driver's seat slide position sensor
Fuel lid opener motor
Fuel pump control ecu
G311 (center of rear shelf)
G402 (above left rear wheel- well)
G904 (under left "c" pillar)
G905 (under right "c" pillar)
High mounted stop- light
Junction connector j/c 20 (above left rear wheelwell)
Junction connector j/c 22 (under right "c" pillar)
Junction connector j/c 23 (under left front seat)
Junction connector j/c 24 (under right front seat)
Led
Left buckle switch
Left license light
Left rear combination light
Left rear door ecu
Light failure sensor
Luggage compartment door key unlock switch
Navigation ecu
P19
Passenger's lumbar support switch
Passenger's power seat control switch
Passenger's seat back heater
Power seat ecu
Right buckle switch
Right license light
Right rear combination light
Right rear door ecu
S17
Stereo component amplifier
Stop- light noise filter
Telephone transceiver & speaker relay
Wireless door lock ecu

HEADLIGHTS

Headlamps Wiring Diagram, with DRL (1 of 2) for Lexus GS 300 1999

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List of elements for Headlamps Wiring Diagram, with DRL (1 of 2) for Lexus GS 300 1999:

(dash harn, behind combination meter)
(dash harn, right side of dash)
(in driver's door)
(left front strut tower) g102
(right front strut tower)
A10
A15
A17
A19
Altl
Auto
Automatic light control sensor (behind upper left side of dash)
B10
Bdr
Becu
Body ecu 2 (in driver side j/b)
Cltb
Clte
Clts
Combination switch
Computer data lines system
Cpub
Cty
Ctye
D fr door fuse 20a
D22
D23
D24
Dimmer switch
Driver door ecu
Driver side j/b (behind left kick panel)
Driver side j/b (behind left kick panel) of dash)
Driver side j/b (behind lower left end of dash)
Ecu-ig fuse 15a
Engine room r/b 1 (on right side of engine compt, behind strut tower)
Exterior lights system
Ffgo
Ffog
Flash
Fog relay
Foglight switch
Fr fog fuse 15a
G103
G200
Gauge fuse 10a
Grd
Gswo
H11
H13
Head
Headlight switch
High
Hot at all times
Hot in start or run
Hrly
Junction connector j/c 10 (behind left side of dash)
Junction connector j/c 17 (upper right end of dash)
Junction connector j/c 6 (left kick panel)
Junction connector j/c 7 (left kick panel)
Left front door courtesy switch
Left front foglight
Low
Mpx-b fuse 10a
Mpx1
Mpx2
Off
Passenger side j/b (behind right kick panel)
Red
Right front foglight
Sig
Srs-b fuse 5a
Tail
Trly

Headlamps Wiring Diagram, with DRL (2 of 2) for Lexus GS 300 1999

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List of elements for Headlamps Wiring Diagram, with DRL (2 of 2) for Lexus GS 300 1999:

(on right side of engine compt, behind strut tower) engine room r/b 1
A14
A15
A22
B11
Combination meter
Daytime running light relay (main) (behind right end of dash)
Daytime running light relay 3 & 4 (at left front corner of engine compt)
Daytime running light resistor (left strut tower)
Dimmer drl 2 relay
Drl 1 fuse 30a
Drl 2 fuse 30a
E4 (engine harn, under ecu box)
Ecu-b2 fuse 5a
Engine room r/b 1 (on right side of engine compt, behind strut tower)
Engine room r/b 3 (on left side of engine compt, front of strut tower)
Engine room relay block 3 (on left side of engine compt, front of strut tower)
G102 (left front strut tower)
G103 (right front strut tower)
Head ind (usa)
Head lp relay
Headlights system (headlight beam level control ecu)
High beam ind
Hot at all times
Junction connector j/c 11 (left side of dash)
Junction connector j/c 14 (behind left side of dash)
Junction connector j/c 15 (behind left side of dash)
Junction connector j/c 18 (right kick panel)
Left high beam headlight
Left low beam headlight (ex hid) left headlight control ecu (hid)
Left lower head fuse 15a
Left upper head fuse 15a
Main fuse 40a
Parking brake switch (behind left side of dash)
Passenger side j/b (behind right kick panel)
Pnk
Red
Right high beam headlight
Right low beam headlight (ex hid) right headlight control ecu (hid)
Right lower head fuse 15a
Right upper head fuse 15a
Short connector (canada) (left strut tower)

Headlamps Wiring Diagram, without DRL (1 of 2) for Lexus GS 300 1999

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List of elements for Headlamps Wiring Diagram, without DRL (1 of 2) for Lexus GS 300 1999:

(dash harn, right side of dash) i6
(left front strut tower) g102
(left kick panel) junction connector j/c 7
A15
A17
A19
Auto
Automatic light control sensor (behind upper left side of dash)
B10
B14
B15
Bdr
Becu
Body ecu 2
Cltb
Clte
Clts
Computer data lines system
Cpub
Cty
Ctye
D fr door fuse 20a
Dimmer switch
Driver door ecu (in driver's door)
Driver side junction block (behind left kick panel)
Ecu-ig fuse 15a
Engine room relay block 1 (on right side of engine compt, behind strut tower)
Exterior lights system
Ffgo
Ffog
Flash
Fog lights
Fog relay
Foglight switch
Fr fog fuse 15a
G103 (right front strut tower)
G200
Grd
Gswo
H11
H13
Head
Headlight switch
High
Hot at all times
Hot in run or start
Hrly
Junction connector j/c 10 (upper left end of dash)
Junction connector j/c 6 (left kick panel)
Left front door courtesy switch
Left front foglight
Low
Mpx-b fuse 10a
Mpx1
Mpx2
Off
Passenger side junction block (behind right kick panel)
Red
Right front foglight
Sig
Tail
Trly

Headlamps Wiring Diagram, without DRL (2 of 2) for Lexus GS 300 1999

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List of elements for Headlamps Wiring Diagram, without DRL (2 of 2) for Lexus GS 300 1999:

A14
A15
B11
Combination meter
Driver side junction block (behind left kick panel)
Engine room relay block 1 (on right side of engine compt, behind strut tower)
Engine room relay block 3 (on left side of engine compt, front of strut tower)
G102 (left front strut tower)
G103 (right front strut tower)
Head lp relay
Headlights system (headlight beam level control ecu)
Hi beam indic
Hot at all times
Junction connector j/c 14 (behind left side of dash)
Junction connector j/c 15 (behind left side of dsah)
Left high beam headlight
Left low beam headlight
Left low beam headlight control ecu
Left lower head fuse 15a
Left upper head fuse 15a
Main fuse 40a
Mpx buss
Pnk
Pwr
Red
Right high beam headlight
Right low beam headlight
Right low beam headlight control ecu
Right lower head fuse 15a
Right upper head fuse 15a
Srs-b fuse 5a
W/ hid
W/o hid

Headlamps Leveling Wiring Diagram for Lexus GS 300 1999

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List of elements for Headlamps Leveling Wiring Diagram for Lexus GS 300 1999:

(behind combination meter) junction connector j/c 14
A15
Anti-lock brakes system
Auto
Automatic light control sensor (behind upper left side of dash)
Becu
Body ecu 2
Cltb
Clte
Clts
Combination meter
Driver side junction block (behind left kick panel)
E1 (grd)
Ecu-ig fuse 15a
Engine room relay block 1 (on right side of engine compt, behind strut tower)
Exterior lights system
Front height control sensor (forward of left front strut tower)
G102 (left front strut tower)
G200
Gauge fuse 10a
Grd
H13
Hdlp
Head
Headlight beam level control ecu (at left front of engine compt)
Headlight beam level control warning indicator
Headlight switch
Headlights system
Hot at all times
Hot in start or run
Hrly
I1 (dash harn, behind combination meter)
I6 (dash harn, right side of dash)
Junction connector j/c 10 (upper left end of dash)
Junction connector j/c 6 (left kick panel)
Junction connector j/c 7 (left kick panel)
Left headlight beam level control motor
Lhb1
Mpx-b fuse 10a
Off
Passenger side junction block (behind right kick panel)
Rear height control sensor (under left rear of vehicle)
Red
Rh1
Rh2
Rh3
Rh4
Right headlight beam level control motor (on headlight assembly)
Sbf
Sbr
Sgf
Sgr
Shf
Shr
Spdl
Tail
Trly
Wng

HORN

Horn Wiring Diagram for Lexus GS 300 1999

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List of elements for Horn Wiring Diagram for Lexus GS 300 1999:

Body ecu 1 (in passenger side junction block)
Combination switch
Engine room r/b 1 (on right side of engine compt, behind strut tower)
Engine room r/b 2 (on left side of engine compt, behind strut tower)
Horn fuse 10a
Horn relay
Horn switch
Hot at all times
J/c 18 (right kick panel)
Left horn
Right horn

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram for Lexus GS 300 1999

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List of elements for Instrument Cluster Wiring Diagram for Lexus GS 300 1999:

(canada)
(usa)
1998-00
A/t p
A10
A11
A12
A13
A14
A15
A16
A16 a1
A17
A18
A19
A20
A21
A22
Abs ind
Anti-lock brake system
B10
B11
B12
B13
B14
B15
B16
B17
B18
Body ecu 2 (in driver's side junction block)
Brake ind
Buzzer
C12
C13
Center air bag sensor assambly (behind center of dash, forward of center console)
Charge ind
Combination meter
Cpu
Cruise ind
Door ind
Driver side junction block (behind left kick panel)
Ect power ind
Ect snow ind
Engine controls system
Engine room relay block 1 (right side of engine compt, behind strut tower)
Exterior lights system
F13
Fuel gauge
Fuel ind
Fuel sender (in fuel tank)
Fuel sender (sub) (in fuel tank)
G102 (left front strut tower)
G200
G201 (upper right side of dash)
Gauge fuse 10a
Head ind
Headlight leveling ind
Headlights system
High beam ind
Hot at all times
Hot in run or start
Interior lights system
J/c 10 (behind left side of dash)
J/c 11 (behind left side of dash)
J/c 17 (behind right side of dash)
J/c 6 (left kick panel)
Left turn ind
M (gs400) 4 (gs300)
Malfunction ind lamp
Mpx-b fuse 10a
Odo/trip
Odometer/ tripmeter
Oil level ind
Oil press ind
Passenger side junction block (behind right kick panel)
Pnk
Rear light ind
Red
Reset
Rheostat
Right turn ind
Seat belt ind
Slip ind
Speedometer
Srs ind
Srs-b fuse 5a
Tachometer
Tail ind
Tilt & and telescopic ecu (behind left side of dash)
Vsc ind
Vsc off ind
Warning system
Washer ind
Washer level warning switch (left front of engine compt)
Water temp gauge

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram (1 of 3) for Lexus GS 300 1999

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List of elements for Courtesy Lamps Wiring Diagram (1 of 3) for Lexus GS 300 1999:

(1998 - 2000)
(dash harn, right side of dash)
A10
A12
A13
A19
B14
B15
Bdr
Becu
Body ecu 2
C12
C18
Computer data lines system
Cpub
Cty
Ctyb
Ctye
D fr door fuse 20a
D rr door fuse 20a
Door
Driver door ecu (in driver's door)
Driver side junction block (behind left kick panel)
Ecu-ig fuse 15a
Exterior lights system
G200
Grd
Gswo
H10
H11
H13
Headlights system
Hot at all times
Hot in run or acc
Hot in run or start
Hrly
I1 (dash harn, behind combination meter)
Ignition key cylinder light
Ile
Junction connector j/c 10 (behind left end of dash)
Junction connector j/c 13 (behind combination meter)
Junction connector j/c 6 (left kick panel)
Junction connector j/c 7 (left kick panel)
Junction connector j/c 8 (behind left kick panel)
Left front door courtesy light
Left front door courtesy switch
Left step light
Mpx1
Mpx2
Passenger side junction block (behind right kick panel)
Personal light
Radio 2 fuse 15a
Right step light
Sig
Trly

Courtesy Lamps Wiring Diagram (2 of 3) for Lexus GS 300 1999

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List of elements for Courtesy Lamps Wiring Diagram (2 of 3) for Lexus GS 300 1999:

(dash harn, behind comb- ination meter)
B2 (body harn, top of right a- pillar)
Bdr
Cpub
Cty
Ctyb
Ctye
Diode (luggage compartment door open detection) (at left side of luggage compartment)
Engine room relay block 1 (on right side of engine compt, behind strut tower)
G311 (center of rear shelf)
G904
G904 (under left c-pillar)
G905
Grd
Hot at all times
Junction connector j/c 20 (above left rear wheelwell)
Junction connector j/c 22 (above right rear wheewell)
Left rear door courtesy light
Left rear door courtesy switch
Left rear door ecu (in left rear door)
Left rear interior light
Left vanity light
Luggage compartment door courtesy switch
Luggage compartment light
Mpx-b fuse 10a
Mpx1
Mpx2
Noise filter (stoplight) (at left front corner of luggage compt)
Passenger side junction block (behind right kick panel)
Power seat ecu (behind left side of dash)
Red
Right rear door courtesy light
Right rear door courtesy switch
Right rear door ecu (in right rear door)
Right rear interior light
Right vanity light
Rrlp
Sig
W/ memory seats
W/o memory seats

Courtesy Lamps Wiring Diagram (3 of 3) for Lexus GS 300 1999

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List of elements for Courtesy Lamps Wiring Diagram (3 of 3) for Lexus GS 300 1999:

(1998 - 2000)
(above right right wheelwell)
(at right side of luggage compartment) wireless door lock ecu
(left rear corner of engine compt) wireless door lock buzzer
A12
A13
A15
A18
A19
Acc
B14
B15
Bdr
Becu
Body ecu 1
Bsub
Bzr
Bzr2
C10
C12
Computer data lines system
Cpub
Cty
Ctyb
Ctye
Dome fuse 10a
F11
Front passenger door ecu (in right front door)
G201 (upper right side of dash)
G905
Grd
Gsw
H11
H12
Hot at all times
Junction connector j/c 15 (behind left side of dash)
Junction connector j/c 17 (upper right end of dash)
Junction connector j/c 22
Mpx1
Mpx2
P fr door fuse 20a
P rr door fuse 20a
Passenger side junction block (behind right kick panel)
Pnk
Rco
Rda
Right front door courtesy light
Right front door courtesy switch
Rssi
Sig

Instrument Illumination Wiring Diagram for Lexus GS 300 1999

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List of elements for Instrument Illumination Wiring Diagram for Lexus GS 300 1999:

(behind combination meter) junction connector j/c 16
(behind left side of dash) junction connector j/c 13
A/c control assembly
A/t shift position illumination
A13
Anti-theft system
C12
Cigarette lighter
Combination meter
Driver side j/b (behind left kick panel)
Driver side junction block (behind left kick panel)
Driver side junction block (behind lower left end of dash)
Electronically controlled transmission pattern select switch
G200
G311 (center of rear shelf)
G904 (under left c-pillar)
Glove box light
Glove box light switch
Grd
Hazard switch
Headlight cleaner switch (canada)
Hot in park or head
I1 (dash harn, behind combination meter)
Instrument panel junction block (behind upper center of dash)
Junction connector j/c 6 (left kick panel)
Left rear ashtray illumination
Left rear door ecu (in left rear door)
Mirror retraction switch
Multi-display
Panel fuse 7.5a
Radio & player
Remote control mirror switch
Rheostat (security indicator light)
Right rear ashtray illumination
Right rear door ecu (in right rear door)
Seat heater switch
Vsc off switch
Whe1

MEMORY SYSTEMS

Memory System Wiring Diagrams (1 of 2) for Lexus GS 300 1999

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List of elements for Memory System Wiring Diagrams (1 of 2) for Lexus GS 300 1999:

(left kick panel) j/c 8
(left side of dash) j/c 13
Acc
Bdr
Becu
Body ecu 1
Body ecu 2
Bsub
Computer data lines system
Cpub
D fr door fuse 20a
D22
D23
D24
De2
Dm+r
Dmhr
Dmvr
Down
Driver door ecu (in driver's door)
Driver side j/b (behind lower left end of dash)
Driving position & memory control switch
Dvc
Ecu-ig fuse 15a
Engine room r/b 1 (right side of engine compt, behind strut tower)
F11
F12
F13
G200
G201 (upper right side of dash)
Gnd
Gsw
Gswo
H10
H11
Hot at all times
Hot in accy or run
Hot in on or start
Hsr
Hssr
I6 (dash harn, right side of dash)
Interior lights system
J/c 10 (upper left end of dash)
J/c 15 (left side of dash)
J/c 17 (upper right end of dash)
J/c 6 (left kick panel)
J/c 7 (left kick panel)
Left
Left remote control mirror
Mem 1
Mem 2
Mirb
Mire
Mirror retraction switch
Mirs
Mpx-b fuse 10a
Mpx1
Mpx2
Mr+
Mr-
Mswe
Operation switch
P fr door fuse 20a
Passenger door ecu (in right front door)
Passenger j/b (behind lower right end of dash)
Pe2
Pm+r
Pmhr
Pmvr
Pnk
Pvc
Radio 2 fuse 15a
Red
Remote control mirror switch
Ret
Right
Right remote control mirror
Select switch
Set
Sig
Vsr
Vssr

Memory System Wiring Diagrams (2 of 2) for Lexus GS 300 1999

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List of elements for Memory System Wiring Diagrams (2 of 2) for Lexus GS 300 1999:

(body harness, under driver's seat)
(upper left end of dash) j/c 10
Computer data lines system
D p/seat fuse 30a
Down
Driver side j/b (behind lower left end of dash)
Driver's seat front vertical motor
Driver's seat lumbar support control motor
Driver's seat rear vertical motor
Driver's seat reclining motor
Driver's seat sliding motor
Ecu-b2 fuse 5a
Ecub
Ecue
Fdwn
Front
Front vertical control sensor
Frv+
Frv-
Fup
G200
G904
G904 (under left "c" pillar)
Gnd
Hot at all times
J/c 18 (right kick panel)
J/c 20 (left quarter panel)
J/c 23 (below driver's seat)
J/c 6 (left kick panel)
Ldwn
Lft+
Lft-
Lumbar support control switch
Lup
Mpx1
Mpx2
Msw
P p/seat fuse 30a
P18
P19
Passenger side j/b (behind lower right end of dash)
Power seat control switch
Power seat ecu (under driver's seat)
Power telescopic motor
Power tilt motor
Pvcc
Rcl+
Rcl-
Rclf
Rclr
Rear
Rear vertical control sensor
Recline control sensor
Sgnd
Sld+
Sld-
Sldf
Sldr
Slide control sensor
Ssfv
Ssrl
Ssrr
Ssrs
Sysb
Tel lng
Tel shrt
Tem+
Tem-
Tilt & telescopic ecu (behind left side of dash)
Tilt & telescopic switch
Tilt down
Tilt up
Tim+
Tim-

PASSIVE RESTRAINTS

Passive Restraint Wiring Diagram for Lexus GS 300 1999

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List of elements for Passive Restraint Wiring Diagram for Lexus GS 300 1999:

Driver side j/b (behind left kick panel)
Ecu-ig fuse 15a
F11
G311 (center of rear shelf)
G904 (under left "c" pillar)
Hot in run or start
J/c 15 (behind left side of dash)
J/c 23 (under driver's seat)
J/c 24 (under front passenger's seat)
J/c 7 (left kick panel)
J/c 8 (left kick panel)
Left buckle switch (in buckle)
Left tension reducer solenoid (base of left "b" pillar)
Passenger side j/b (right kick panel)
Right buckle switch (in buckle)
Right tension reducer solenoid (base of right "b" pillar)

POWER ANTENNA

Power Antenna Wiring Diagram for Lexus GS 300 1999

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List of elements for Power Antenna Wiring Diagram for Lexus GS 300 1999:

(1999-00)
(2001)
Auto antenna control relay & motor
Dome fuse 10a
Driver side j/b (behind left kick panel)
Ecu-ig fuse 15a
F11
H10
Hot at all times
Hot in acc or on
Hot in on or start
J/c 13 (left side of dash)
J/c 15 (behind left side of dash)
J/c 22 (above right rear wheel- well)
J/c 7 (left kick panel)
Passenger side j/b (behind right kick panel)
Radio & player
Radio 2 fuse 15a

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 2) for Lexus GS 300 1999

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List of elements for Power Distribution Wiring Diagram (1 of 2) for Lexus GS 300 1999:

(behind lower right end of dash) passenger side junction block
(canada)
(on left side of engine compt, front of strut tower) engine room relay block 3
(on right side of engine compt, behind strut tower) engine room relay block 1
(usa)
Abs 1 fuse 60a
Abs 2 fuse 40a
Air conditioning systems
Air conditioning, headlights, memory systems
Alt fuse 120a
Alt-s fuse 5a
Am2 fuse 15a
Anti-lock brakes system
Battery
Body ecu 1
Cds fan fuse 30a
Cellular phones system
Cooling fans system
Defog fuse 30a
Defogger system
Dimmer drl 2 relay
Dome fuse 10a
Drl 1 fuse (canada) 30a
Drl 2 fuse 30a
Ecu-b1 fuse 20a
Ecu-b2 fuse 5a
Efi fuse 25a
Eng main relay
Engine controls, cruise control system
Engine controls, transmission, cruise control systems
Etcs fuse 15a
Exterior lights system
Fan main fuse 50a
From a engine room relay block 1 (diagram 1 of 2)
H-lp cln fuse 30a
H10
H12
Head- light relay
Headlights system
Heater fuse 50a
Horn fuse 10a
Horns, body computer, anti-theft systems
Ig relay
Instrument cluster, headlights interior lights, mirrors, anti-theft, warning, memory systems
Interior lights, door locks, power antenna, clock, garage door opener, door locks, power windows systems
Left lower head fuse 15a
Left upper head fuse (canada) 15a
Left upper head fuse (usa) 10a
Main fuse 40a
Mir htr fuse 10a
Mir relay
Mpx-b fuse 10a
Navigation system
Noise filter
P fr door fuse 20a
P p/ seat fuse 30a
P rr door fuse 20a
Power tops system
Radio 1 fuse 20a
Rdi fan fuse 30a
Red
Right front door ecu
Right lower head fuse 15a
Right rear door ecu
Right upper head fuse (canada) 15a
Right upper head fuse (usa) 10a
S/roof fuse 25a
Seat htr fuse 20a
Seats system
Seats, electronic power steering systems
Sound systems
Starter
Starting/ charging system
Tel fuse 15a
To driver side junction block (diagram 2 of 2)
To engine room relay block 1 (diagram 1 of 2)
To ignition switch (diagram 2 of 2)
Turn/ hazard fuse 10a
Tv fuse 15a
Wiper/ washer system

Power Distribution Wiring Diagram (2 of 2) for Lexus GS 300 1999

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List of elements for Power Distribution Wiring Diagram (2 of 2) for Lexus GS 300 1999:

(behind lower left end of dash) driver side junction block
Acc
Am 1 fuse 40a
Anti-lock brakes, instrument cluster, headlights, engine controls, exterior lights, starting/charging, cruise control, transmission, navigation, warning, electronic power steering, systems
Anti-lock brakes, warning, cellular phones, door locks, power windows, headlights, power tops, mirrors, electronic power steering, seats, power antenna, passive restraints, interior lights, trunk, tailgate, fuel doors, mirrors systems
Body ecu 2
Cig fuse 15a
Cigar- ette lighter
Computer data lines system
D fr door fuse 20a
D p/seat fuse 30a
D rr door fuse 20a
Defoggers, air conditioning systems
E11
Ecu-ig fuse 15a
Exterior lights system
F10
Fog relay
Fr fog fuse 15a
From am2 fuse, engine room relay block (diagram 1 of 2)
From engine room relay block 1 (diagram 1 of 2)
Fuel opn fuse 10a
G201 (upper right side of dash)
Gauge fuse 10a
H10
H12
Heater fuse 10a
Ign fuse 5a
Ignition switch
Interior lights, systems
Junction connector j/c 12 (behind combination meter)
Junction connector j/c 15 (behind combination meter)
Junction connector j/c 17 (upper right end of dash)
Left front door ecu
Lock
Obd fuse 7.5a
Panel fuse 7.5a
Pnk
Power outlet
Radio 2 fuse 15a
Right rear door ecu
Run
Seats, memory systems
Sound, body computer, air con- ditioning, navigation, anti-theft, interior lights, warning, memory, power windows systems
Srs acc fuse 15a
Srs-b fuse 5a
Start
Starter fuse 5a
Starting/ charging, engine controls system
Stop fuse 15a
Tail fuse 10a
Tail relay
Transmissions, cruise control anti-lock brakes, engine controls, exterior lights systems
Trunk, tailgate, fuel doors system
Washer fuse 20a
Wiper fuse 25a
Wiper/ washer systems

POWER DOOR LOCKS

Power Door Lock Wiring Diagram (1 of 3) for Lexus GS 300 1999

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List of elements for Power Door Lock Wiring Diagram (1 of 3) for Lexus GS 300 1999:

(dash harn, right side of dash)
A13
A15
A17
A19
B14
B15
Bdr
Becu
Body ecu 2
C12
C18
Computer data lines system
Cpub
Cty
Ctye
D fr door fuse 20a
D rr door fuse 20a
Driver door ecu (in driver's door)
Driver side junction block (behind left kick panel)
Ecu-ig fuse 15a
Exterior lights system
G200
Grd
Gswo
H10
H11
H13
Headlights system
Hot at all times
Hot in accy or run
Hot in run or start
Hrly
Ile
Interior lights system
Junction connector j/c 10 (behind left side of dash)
Junction connector j/c 13 (behind left side of dash)
Junction connector j/c 6 (left kick panel)
Junction connector j/c 7 (left kick panel)
Junction connector j/c 8 (behind left kick panel)
Kul
Left door lock control switch (power window master switch)
Left front door courtesy switch
Left front door lock motor, door key lock & unlock switch & door lock detection switch
Lock
Lock detect
Lsw
Lswe
Mpx1
Mpx2
Mul
Pwe
Radio 2 fuse 15a
Sig
Trly
Unlk

Power Door Lock Wiring Diagram (2 of 3) for Lexus GS 300 1999

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List of elements for Power Door Lock Wiring Diagram (2 of 3) for Lexus GS 300 1999:

Bdr
Cpub
Cty
Ctye
Diode (luggage compartment door open detection) (at left side of luggage compt)
Engine hood courtesy switch
Engine room relay block 1 (on right side of engine compt, behind strut tower)
G102 (left front strut tower)
G311 (center of rear shelf)
G904
G904 (under left c-pillar)
G905
Grd
Hot at all times
Junction connector j/c 20 (left quarter panel)
Junction connector j/c 22 (under right c-pillar)
Left rear door courtesy switch
Left rear door ecu (in left rear door)
Left rear door lock motor & door lock detection switch
Lock detect
Lsw
Lswe
Luggage compartment door courtesy switch & opener motor
Luggage compartment door key unlock switch
Mpx-b fuse 10a
Mpx1
Mpx2
Power seat ecu (under driver's seat)
Right rear door courtesy switch
Right rear door ecu (in right rear door)
Right rear door lock motor & door lock detection switch
Sig
W/ memory seats
W/o memory seats

Power Door Lock Wiring Diagram (3 of 3) for Lexus GS 300 1999

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List of elements for Power Door Lock Wiring Diagram (3 of 3) for Lexus GS 300 1999:

(at right side of luggage compartment) wireless door lock ecu
(left rear corner of engine compt) wireless door lock buzzer
(under right c-pillar) junction connector j/c 22
A10
A12
A13
A15
A16
A18
A19
A22
A25
Acc
B14
B15
Bdr
Becu
Body ecu 1
Bsub
Bzr
Bzr2
C12
C15
C16
C17
Combination meter
Computer data lines system
Cpub
Cty
Ctye
Dle
Dome fuse 10a
Engine control system
Exterior lights system
F11
Front passenger door ecu (in passenger's door)
G200
G201 (upper right side of dash)
G905
Grd
Gsw
H11
H13
Haz
Hcty
Horn
Horns system
Hot at all times
Ind
Junction conenctor j/c 6 (left kick panel)
Junction connector j/c 14 (behind left side of dash)
Junction connector j/c 15 (behind left side of dash)
Junction connector j/c 17 (upper right end of dash)
Kul
Lgcy
Lock
Lock detect
Lsw
Lswe
Mpx1
Mpx2
Mul
P fr door fuse 20a
P rr door fuse 20a
Passenger side junction block (behind lower right end of dash)
Passenger side junction block (behind right kick panel)
Pnk
Pws
Rco
Rda
Right front door courtesy switch
Right front door lock control switch
Right front door lock motor, door key lock & unlock switch & door lock detection switch
Rssi
Security indicator (rheostat)
Sig
Theft deterrent horn (at right front of engine compt)
Tkul
Tr+
Unlk

POWER MIRRORS

Electrochromic Mirror Wiring Diagram for Lexus GS 300 1999

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List of elements for Electrochromic Mirror Wiring Diagram for Lexus GS 300 1999:

(behind left side of dash) j/c 15
(dash harn, right side of dash) i6
D10
Driver side j/b (behind left kick panel)
Ec+
Ec-
Ecu-ig fuse 15a
F11
G201 (upper right side of dash)
Gnd
Hot in on or start
Inner mirror
J/c 7 (left kick panel)
Left remote control mirror
Passenger side j/b (behind right kick panel)
R16
R17
Right remote control mirror

Power Mirrors Wiring Diagram for Lexus GS 300 1999

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List of elements for Power Mirrors Wiring Diagram for Lexus GS 300 1999:

(1998 - 2000)
(2001)
(left side of dash) j/c 13
Acc
Bdr
Becu
Body ecu 1
Body ecu 2
Bsub
Computer data lines system
Cpub
D fr door fuse 20a
D22
D24
Dm+r
Dmhr
Dmvr
Down
Driver door ecu (in driver's door)
Driver side j/b (behind lower left end of dash)
Ecu-ig fuse 15a
Engine room relay block 1 (on right side of engine compartment, behind strut tower)
F11
F13
G200
G201 (upper right side of dash)
Gnd
Gsw
Gswo
H10
H11
Hot at all times
Hot in on or start
Hot in run or accy
I6 (dash harn, right side of dash)
J/c 10 (upper left end of dash)
J/c 15 (left side of dash)
J/c 17 (upper right end of dash)
J/c 6 (left kick panel)
J/c 7 (left kick panel)
Left
Left remote control mirror
Mirb
Mire
Mirs
Mpx-b fuse 10a
Mpx1
Mpx2
Operation switch
P fr door fuse 20a
Passenger door ecu (in right front door)
Passenger side j/b (behind lower right end of dash)
Pm+r
Pmhr
Pmvr
Radio 2 fuse 15a
Remote control mirror switch
Right
Right remote control mirror
Select switch
Sig

POWER SEATS

Driver Seat Wiring Diagram for Lexus GS 300 1999

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List of elements for Driver Seat Wiring Diagram for Lexus GS 300 1999:

D p/seat fuse 30a
Down
Driver side j/b (behind left kick panel)
Driver's lumbar support control switch
Driver's power seat control switch
Driver's seat front vertical motor (under seat)
Driver's seat lumbar motor (in seatback)
Driver's seat rear vertical motor (under seat)
Driver's seat reclining motor (under seat)
Driver's seat slide motor (under seat)
Front
G904 (under left c-pillar)
Hot at all times
J/c 23 (under driver's seat)
Rear
Reclining
Slide
Support lumbar
Vertical front
Vertical rear

Heated Seats Wiring Diagram for Lexus GS 300 1999

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List of elements for Heated Seats Wiring Diagram for Lexus GS 300 1999:

Alt fuse 120a
Driver side j/b (behind left kick panel)
Driver's seat heater (in seat back)
Driver's seat heater (in seat cushion)
Ecu-ig fuse 15a
Engine room r/b 1 (right side of engine compt, behind strut tower)
Front passenger's seat heater (in seat back)
Front passenger's seat heater (in seat cushion)
G200
G201 (upper right side of dash)
G311 (center of rear shelf)
G904 (under left "c" pillar)
Hot at all times
Hot in on or start
Ignition relay
J/c 10 (upper left end of dash)
J/c 11 (behind left side of dash)
J/c 15 (upper left side of dash)
J/c 23 (under driver's seat)
J/c 24 (under passenger's seat)
J/c 6 (left kick panel)
J/c 7 (left kick panel)
Left
Passenger side j/b (behind right kick panel)
Right
Seat heater switch
Seat htr fuse 20a

Passenger Seat Wiring Diagram for Lexus GS 300 1999

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List of elements for Passenger Seat Wiring Diagram for Lexus GS 300 1999:

Down
Front
G311 (center of rear shelf)
Hot at all times
J/c 24 (under passen -ger's seat)
J/c 24 (under passenger's seat)
P p/seat fuse 30a
Passenger side j/b (behind left kick panel)
Passenger's lumbar support control switch
Passenger's power seat control switch
Passenger's seat front vertical motor (under seat)
Passenger's seat lumbar motor (in seatback)
Passenger's seat rear vertical motor (under seat)
Passenger's seat reclining motor (under seat)
Passenger's seat slide motor (under seat)
Rear
Reclining
Slide
Support lumbar
Vertical front
Vertical rear

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagrams for Lexus GS 300 1999

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List of elements for Power Top/Sunroof Wiring Diagrams for Lexus GS 300 1999:

25a
Body ecu 1
Close
Down
Driver side junction block (behind left kick panel)
Ecu-ig fuse 15a
F11
F13
G200
Hot at all times
Hot in run or start
Ign
J/c 10 (behind left side of dash)
J/c 15 (upper left side of dash)
J/c 6 (left kick panel)
J/c 7 (left kick panel)
Moon roof control ecu (in front of moon roof opening)
Moon roof control switch
Mpx1
Mpx2
Open
Passenger side junction block (behind right kick panel)
Pnk
S/roof fuse

POWER WINDOWS

Power Window Wiring Diagram (1 of 3) for Lexus GS 300 1999

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List of elements for Power Window Wiring Diagram (1 of 3) for Lexus GS 300 1999:

(1999-00 only)
(dash harn, right side of dash)
Auto
Bdr
Becu
Body ecu 2
Computer data lines system
Cpub
Cty
Ctye
D fr door fuse 20a
D rr door fuse 20a
D22
D23
D24
Down
Driver door ecu (in driver's door)
Driver side junction block (behind left kick panel)
Dt1
Dt2
Dt3
Ecu-ig fuse 15a
G200
Grd
Gswo
H10
H11
Hot at all times
Hot in accy or run
Hot in run or start
J/c 10 (behind left side of dash)
J/c 13 (behind combination meter)
J/c 6 (left kick panel)
J/c 7 (left kick panel)
J/c 8 (left kick panel)
Kul
Left front door key lock & unlock switch
Lmt
Lock
Lswe
Mdn
Mpx1
Mpx2
Mup
Pls
Power window master switch
Pwe
Pws
Radio 2 fuse 15a
Red
Sc1
Sc2
Sc3
Sgrd
Sig
Unlk
W/l
W/l2
Window lock switch
Wlsw

Power Window Wiring Diagram (2 of 3) for Lexus GS 300 1999

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List of elements for Power Window Wiring Diagram (2 of 3) for Lexus GS 300 1999:

Auto
Auto down
Auto up
Bdr
Cpub
E10
Engine room relay block 1 (on right side of engine compt, behind strut tower)
G313 (right side of rear shelf)
G904 (under left "c" pillar)
G905
Grd
Hot at all times
J/c 13 (behind combination meter)
J/c 22 (under right "c" pillar)
Left front door courtesy switch
Left front power window motor
Left rear door ecu (in left rear door)
Left rear power window control switch
Lmt
Mdn
Mpx-b fuse 10a
Mpx1
Mpx2
Mup
Passenger side junction block (behind right kick panel)
Pct1
Pcto
Pls
Power seat ecu (under driver's seat)
Pwe
Red
Right rear door ecu (in right rear door)
Right rear power window control switch
Sgrd
Sig
W/ memory seats
W/o memory seats

Power Window Wiring Diagram (3 of 3) for Lexus GS 300 1999

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List of elements for Power Window Wiring Diagram (3 of 3) for Lexus GS 300 1999:

(1999-00 only)
(at right side of luggage compartment) wireless door lock ecu
(under right "c" pillar) j/c 22
Acc
Auto
Auto down
Auto up
Bdr
Becu
Body ecu 1
Bsub
Computer data lines system
Cpub
Cty
Ctye
Dome fuse 10a
F11
F12
F13
Front passenger door ecu (in passenger's door)
G200
G201 (upper right side of dash)
G905
Grd
Gsw
H11
Hot at all times
J/c 10 (upper left end of dash)
J/c 15 (behind left side of dash)
J/c 17 (upper right end of dash)
J/c 6 (left kick panel)
Kul
Lmt
Lock
Lswe
Mdn
Mpx1
Mpx2
Mup
P fr door fuse 20a
P rr door fuse 20a
Passenger side junction block (behind right kick panel)
Pls
Pnk
Pwe
Pws
Rco
Rda
Red
Right front door courtesy switch
Right front door key lock & unlock switch
Right front power window control switch
Right front power window motor
Rssi
Sgrd
Sig
Unlk

RADIO

Radio Wiring Diagrams, Except Nakamichi with Navigation for Lexus GS 300 1999

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List of elements for Radio Wiring Diagrams, Except Nakamichi with Navigation for Lexus GS 300 1999:

A10
A11
A12
Acc
Ant
Anta
Antb
B10
B12
Bus+
Bus-
C10
Cd automatic changer
Cdl+
Cdl-
Cdr+
Cdr-
Cdr_
Ckl+
Dome fuse 10a
Driver's side j/b (behind left kick panel)
Engine room r/b 1 (right side of engine compartment, behind strut tower)
F11
Fl+
Fl-
Fr+
Fr-
G302 (right side of instrument panel brace)
Gnd
Hot at all times
Hot in acc or on
Instrument panel j/b (behind upper center of dash)
Junction connector (behind right kick panel)
Left front door speaker
Left rear door speaker
Multi-display
Mute
Navigation ecu (right rear corner of luggage compartment)
Nca
Passenger's side j/b (behind right kick panel)
Pnk
Power antenna system
Radio and player
Radio fuse 1 20a
Radio fuse 2 15a
Red
Right front door speaker
Right rear door speaker
Rl+
Rl-
Rr+
Rr-
Sgd4
Sgnd
Speaker
Speaker relay
Stereo component amplifier
Telephone transceiver
Telephone transceiver & speaker relay (right side of luggage compartment)
Tlmt
Tweeter
Tx+
Tx-
Tx1+
Tx1-
Txm+
Txm-
Wf+
Wf-
Woofer speaker

Radio Wiring Diagrams, Except Nakamichi without Navigation for Lexus GS 300 1999

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List of elements for Radio Wiring Diagrams, Except Nakamichi without Navigation for Lexus GS 300 1999:

A10
A11
A12
Acc
Ant
Anta
Antb
B10
B12
Bus+
Bus-
C10
Cd automatic changer
Cdl+
Cdl-
Cdr+
Cdr-
Cdr_
Ckl+
Dome fuse 10a
Driver's side j/b (behind left kick panel)
Engine room r/b 1 (right side of engine compartment, behind strut tower)
F11
Fl+
Fl-
Fr+
Fr-
G302 (right side
Gnd
Hot at all times
Hot in acc or on
Instrument panel j/b (behind upper center of dash)
Junction connector (behind right kick panel)
Left front door speaker
Left rear door speaker
Mute
Nca
Of instrument panel brace)
Passenger's side j/b (behind right kick panel)
Pnk
Power antenna system
Radio & player
Radio fuse 1 20a
Radio fuse 2 15a
Red
Right front door speaker
Right rear door speaker
Rl+
Rl-
Rr+
Rr-
Sgd4
Sgnd
Speaker
Speaker relay
Stereo component amplifier
Telephone transceiver
Telephone transceiver & speaker relay (right side of luggage compartment)
Tlmt
Tweeter
Txm+
Txm-
Wf+
Wf-
Woofer speaker

Radio Wiring Diagrams, Nakamichi for Lexus GS 300 1999

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List of elements for Radio Wiring Diagrams, Nakamichi for Lexus GS 300 1999:

A10
A11
A12
A13
A14
Acc
Acc1
Amp
Amp+
Automatic cd changer
B1+
B10
B11
B12
B13
B14
B2+
Beep
C10
C11
C12
C13
Cdl+
Cdl-
Cdr-
Crd+
Dl+
Dl-
Dome fuse 10a
Dr+
Dr-
Driver's side j/b (behind left kick panel)
Engine room r/b 1 (right side of engine compartment, behind strut tower)
F11
Fl+
Fl-
Fr+
Fr-
G302 (right side of instrument panel brace)
G311 (center of rear shelf)
Gnd
Gnd1
Gnd4
Gnd5
Hot at all times
Hot in acc or on
Instrument panel j/b (behind upper center of dash)
Junction connector j/c 18 (behind right kick panel)
Junction connector j/c 21 (above right rear wheelwell)
Junction connector j/c 22 (under right c-pillar)
Left front door speaker
Left rear door speaker
Mute
Nca
Passenger's side j/b (behind right kick panel)
Pnk
Radio & player
Radio fuse 1 20a
Radio fuse 2 15a
Red
Right front door speaker
Right rear door speaker
Rl+
Rl-
Rr+
Rr-
Se2
Sgnd
Speaker
Speaker relay
Stereo component amplifier
Telephone transceiver
Telephone transceiver & speaker relay (right side of luggage compartment)
Tlmt
Tweeter
Txm+
Txm-
Wf+
Wf-
Woofer speaker

SHIFT INTERLOCKS

Shift Interlock Wiring Diagram for Lexus GS 300 1999

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List of elements for Shift Interlock Wiring Diagram for Lexus GS 300 1999:

(1999) (2000-2001)
(2001) (1999-2000)
(upper right side of dash)
Acc
At4
Atl
Body ecu 2 (in driver side junction box) (1999-2000)
Driver side junction block (behind left kick panel)
Engine control module (at left side of engine compt, in ecu box)
G200
G201
Gauge fuse 10a
H10
Hot in acc or run
Hot in run or start
J/c 1 (at left side of engine compartment, in ecu box)
J/c 10 (behind left side of dash)
J/c 13 (behind left side of dash)
J/c 17 (behind right side of dash)
J/c 17 (behind upper right side of dash)
J/c 3-j/c 4 (at left side of engine compt, in ecu box)
J/c 6 (left kick panel)
Key interlock solenoid & unlock warning switch (behind left side of dash)
Kls+
Nssd
Nssl
Park/neutral position switch (on transmission)
Radio 2 fuse 15a
Shift lock control ecu (under center console, near selector lever)
Slck
Sls+

STARTING/CHARGING

Charging Wiring Diagram for Lexus GS 300 1999

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List of elements for Charging Wiring Diagram for Lexus GS 300 1999:

(1998) (1999 & 2000)
(3.0l)
(4.0l)
A/c control assembly (behind center of dash)
A1 k1
Acc
Alt fuse 120a
Alt-s fuse 5a
Am1 fuse 40a
Battery
Battery ground
C12
C13
Charge warning light
Comb- ination meter
Driver side junction block (behind left kick panel)
E2 (3.0l)
E7 (4.0l)
Engine control module (at left side of engine compt, in ecu box)
Engine room relay block 1 (on right side of engine compt, behind strut tower)
F13
G200 (left kick panel)
G201 (upper right side of dash)
Gauge fuse 10a
Generator
Ignition switch
J/c 1 (at left side of engine compartment in ecu box)
J/c 17 (right side of dash)
J/c 6 (left kick panel)
Mpx+
Mpx-
Mpx1
Mpx2
Multi-display
Nca
Off
Start
Tilt & telescopic ecu (behind left side of dash)
W/ navigation system
W/o navigation system

Starting Wiring Diagram for Lexus GS 300 1999

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List of elements for Starting Wiring Diagram for Lexus GS 300 1999:

(1998 & 1999) (2000)
(2000) (1998 & 1999)
(3.0l) (4.0l)
3.0l
4.0l
Acc
Am2 fuse 15a
Battery
Battery ground
Driver side junction block (behind left kick panel)
E5 e5
Engine control module (at left side of engine compartment, in ecu box)
Engine room relay block 1 (on right side of engine compartment, behind strut tower)
F10
G103 (right front strut tower)
G116 (under abs/ trac/ vsc actuator)
Ignition switch
J/c 3, j/c 4 (at left side of engine compartment in ecu box)
J/c 5 (in engine room r/b 2)
J4 a
Main fuse 40a
Nca
Off
Park/neutral position switch (on transmission)
Sta
Start
Starter
Starter fuse 5a
Starter relay

SUPPLEMENTAL RESTRAINTS

Supplemental Restraint Wiring Diagram for Lexus GS 300 1999

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List of elements for Supplemental Restraint Wiring Diagram for Lexus GS 300 1999:

(at left side of engine compartment, behind ecu box)
(in driver side j/b) body ecu 2
(left side of dash)
(partial)
(partial) (behind left side of dash)
+sl
+sr
-sl
-sr
A10
A11
A12
A14
Acc
Air bag squib (front passenger air bag assembly)
Air bag squib (steering wheel pad)
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
B25
B26
B27
B28
C10
C11
C12
Center airbag sensor assembly (behind center of dash, forward of center console)
Combination meter
Data link connector (dlc) 1
Driver side j/b (behind lower left end of dash)
Esl
Esr
Fsl
Fsr
G200
G202
Gsw
Hot at all times
Hot in acc or on
Hot in on or start
Ig2
Ign fuse 5a
J/c 6 (behind left kick panel)
J/c 9 (behind left side of dash)
Left front air bag sensor (at left front corner of engine compartment)
Left pretensioner (at base of left "b" pillar)
Left side air bag sensor (near base of left "b" pillar)
Left side air bag squib
Pl+
Pl-
Pnk
Pr+
Pr-
Right front air bag sensor (at right front corner of engine compartment)
Right pretensioner (at base of right "b" pillar)
Right side air bag sensor (near base of right "b" pillar)
Right side air bag squib
Sfl+
Sfl-
Sfr+
Sfr-
Sil
Spiral cable
Srs warning indicator
Srs-acc fuse 15a
Srs-b fuse 5a
Ssl
Ssr
Vupl
Vupr

TRANSMISSION

A/T Wiring Diagram for Lexus GS 300 1999

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List of elements for A/T Wiring Diagram for Lexus GS 300 1999:

(engine harn, left side of engine)
(front side of intake manifold) g131
(in ecu box) j/c 1
(in ecu box) j/c 3, j/c 4
(under abs/ trac/vsc actuator)
+b1
A/t indicator switch (park/neutral position switch (on transmission)
A/t oil
Accelerator position sensor (left rear side of engine)
Batt
Computer data lines system
Data link connector 1 (left side of engine
Driver side j/b (lower left end of dash)
E01
E02
E03
Efi fuse 25a
Efi relay
Electronic controlled transmission solenoid (in transmission)
Engine control module (left side of engine compt, in ecu box)
Engine coolant temperature sensor (top left front of engine)
Engine room r/b 1 (right side of engine compt)
G116
Gauge fuse 10a
Hot at all times
Hot in on or start
Ign fuse 5a
Igsw
J/c 1 (in ecu box)
J/c 11 (left side of dash)
J/c 14 (left side of dash)
J/c 17 (right side of dash)
J/c 3, j/c 4 (in ecu box)
J/c 7 (left kick panel)
J/c 9 (left side of dash)
Mpx1
Mpx2
Mrel
Nco+
Nco-
No. 1
No. 2
No. 3
No. 4
O/d direct clutch speed sensor (on trans- mission)
Oil
Pnk
R n
Red
Shift lock control ecu (under center console, near selector lever)
Sln
Sln+
Sln- sln-
Slt
Slt+
Slt-
Slu
Slu+
Slu-
Sp2+
Sp2-
Starting/ charging system
Stop fuse 15a
Stoplight switch (on brake pedal bracket)
Stp
Temp
Throttle position sensor (on throttle body)
Thw
Vehicle speed sensor (on transmission)
Vpa
Vpa2
Vta
Vta2

TRUNK, TAILGATE, FUEL DOOR

Trunk, Tailgate, Fuel Door Wiring Diagrams for Lexus GS 300 1999

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List of elements for Trunk, Tailgate, Fuel Door Wiring Diagrams for Lexus GS 300 1999:

(in passenger side junction block)
Acc
Becu
Body ecu 1
Bsub
Driver side junction block (behind left kick panel)
Ecu-ig fuse 15a
Engine room relay block 1 (on right side of engine compartment, behind strut tower)
F11
F13
Fuel lid opener motor (at left side of luggage compt)
Fuel lid opener switch
Fuel opn fuse 10a
G200
G201 (right side of dash)
G402 (above left rear wheelwell)
G904 (under left "c" pillar)
Gnd
H10
Hot at all times
Hot in accy or run
Hot in on or start
J/c 10 (upper left end of dash)
J/c 13 (left side of dash)
J/c 15 (left side of dash)
J/c 20 (above left rear wheelwell)
J/c 6 (left kick panel)
J/c 7 (left kick panel)
Luggage compartment door opener motor
Luggage compartment door opener switch
Mpx-b fuse 10a
P fr door fuse 20a
Passenger side junction block (behind right kick panel)
Radio 2 fuse 15a
Tr+
Tsw

WARNING SYSTEMS

Warning System Wiring Diagrams for Lexus GS 300 1999

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List of elements for Warning System Wiring Diagrams for Lexus GS 300 1999:

(1998) (1999 & 2000)
(behind left side of dash)
(under passenger's seat) j/c 24
Acc
Bdr
Becu
Body ecu 1
Body ecu 2
Bsub
C p u
C12
C13
Combination meter
Computer data lines
Cpub
Cty
Ctye
D fr door fuse 20a
D22
D23
D24
Dbkl
Driver door ecu
Driver's side junction block
Ecu-ig fuse 15a
Engine room relay block 1
F11
F13
G200
G201 (upper right side of dash)
G311 (center of rear shelf)
G904 (under left c-pillar)
Gauge fuse 10a
Gnd
Gsw
Gswo
H10
H11
Hot at all times
Hot in acc or run
Hot in run or start
I6 (dash harn, right side of dash)
Instrument panel junction block
J/c 10 (behind left side of dash)
J/c 13 (behind combination meter)
J/c 15 (upper left side of dash)
J/c 17 (upper right end of dash)
J/c 23 (under driver's seat)
J/c 6 (left kick panel)
J/c 7 (left kick panel)
J/c 9
Ksw
Left buckle switch
Left front door courtesy switch
Mpx-b fuse 10a
Mpx1
Mpx2
P fr door fuse 20a
Passenger side junction block
Passenger side seat belt warning light (in clock)
Pbkl
Radio fuse 10a
Right buckle switch
Seat belt ind
Seat belt warning occupant detection sensor
Sig
Unlock warning switch (behind left side of dash)

WIPER/WASHER

Headlamp Washer Wiring Diagram for Lexus GS 300 1999

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List of elements for Headlamp Washer Wiring Diagram for Lexus GS 300 1999:

(at left front corner of engine compt)
Auto
Body ecu 2 (in driver side junction block)
Combination switch
Daytime running light relay (main)
Diode (behind right side of dash)
Driver side j/b (behind left kick panel)
Drl
E4 (engine harn, under ecu box)
Engine room relay block 1 (on right side of engine compt, behind strut tower)
G102 (left front strut tower)
G200
H-lp cln fuse 30a
Head
Head lp relay
Headlight cleaner control relay (at left front corner of engine compt, behind headlight)
Headlight cleaner motor (at left front corner of engine compt, behind headlight)
Headlight cleaner switch
Headlights system
Hot at all times
Hot in on or start
Hrly
I6 (dash harn, right side of dash)
J/c 10 (behind left side of dash)
J/c 12 (behind left side of dash)
J/c 14 (behind left side of dash)
J/c 6 (left kick panel)
Light control switch
Main fuse 40a
Tail off
Washer fuse 20a

Wiper/Washer Wiring Diagram for Lexus GS 300 1999

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List of elements for Wiper/Washer Wiring Diagram for Lexus GS 300 1999:

C12
C13
Combination meter
Combination switch
Driver side j/b (behind left kick panel)
Front wiper motor (on left side of firewall)
G102 (left front strut tower)
G200
G202 (upper left side of dash)
Gauge fuse 10a
Hot in run or start
Int
J/c 10 (behind left side of dash)
J/c 12 (behind left side of dash)
J/c 6 (left kick panel)
Off
Solid state
W/ drl
W/o drl
Washer fuse 20a
Washer level warning light
Washer level warning switch (at left front corner of engine compt)
Washer motor (left front of engine compt)
Washer switch
Wiper fuse 25a
Wiper switch