Lexus SC300 / Lexus SC400. Manual — part 990
OVERALL ELECTRICAL WIRING DIAGRAM
1
2
34
4
LEXU
S
SC
30
0
1J
7
22
1
J
81
B
2
4
1B
5
1B
4
1K
11
22
2
2
44
1I
1E
3
4
1
2
2
3
1
5
4
AC
C
IG
1
ST
1
AM
1
3
2
1
2
1
2
1
2
1
2
19
IE
1
1
2
IE
1
5I
E
1
6I
E
1
9I
G
1
4
7
6
4
19
1
5
1
3
20
1
6
2
18
4
97
3
1
3
6
7
IJ
1J
5
3A
1E
1C
1A
1I
15
1C
1F
1K
3D
7B
1A
2
1
9
10
BK
IF
1H
1
K
1J
1E
W–
B
Y
Y
G–
O
G
G
W–
L
Y
Y
W–
B
R–
Y
W–
G
G–
W
W–
L
W –L
W–L
W
W–B
R –W
W–B
R
L–W
P–B
G–L
R –W
R –W
BR–
W
B–L
B–L
W–B
W–B
W–B
W–B
W–B
W–B
W–B
R –W
R –W
R –W
R –W
R –W
R–B
R–B
W
G –W
G –W
W
P–L
W –L
G
G
P–L
B–Y
W
R –Y
R–L
R
Y
V
Po
w
e
r
S
our
c
e
F9
FU
S
E
B
L
O
C
K
60A
MA
IN
100A
AM
1
120A
ALT
W
R–Y
40
A
IG
S
W
LO
H I
H I
LO
H EAD
LIG
HT
LH
H EAD
LIG
HT
RH
HEA
D LI
GH
T
RELA
Y
From
C onne
rrin
gLi
ght
Rel
ay<
7–2>
D IO
DE
10A
D O
ME
7.5
ARA
DIO
N o.
2
LIG
H T
CO NT
RO L
DIMME
R
OF
F
TA
IL
HE
A
D
LO
W
HI
G
H
FL
A
S
H
HU
HF
F
L
E
D
T
H
E
L
C1
5
CO
M
B
INA
T
IO
N
S
W
BA
TTER
Y
C13
HIG
HBEA
M
IN
DIC
AT
OR
LIG
H T
[C O
M B
.
ME
TE
R ]
To
Door
Lock
Mot
ora
nd
U nl
ock
Det
ect
io
nS
Wa
nd
D oo
rO
pen
D et
ect
ion
SW
LH
<17–
5><1
7–6
>
To
Door
Lock
Mot
ora
nd
U nl
ock
Det
ect
io
nS
Wa
nd
D oo
rO
pen
D et
ect
ion
SW
R H
<1
7–6>
Fro
mO
penD
oor
Warn
ing
Lig
ht
Fro
mP
erson
alLi
ght<
6–2
>
B4
BAC KL
ES
WL
H
I15
U N
LO
C K
WA
RN
IN
GS
W
[IGN
IT
IO
NSW
]
SEAT
BELT
WA
RN
IN
G
LIG
HT
[C
O M
B.
MET
ER]
51
1
8
TAIL
LIG
H T
RELA
Y
T
o
T
hef
t
D
e
ter
ren
t
and
Do
o
r
L
o
c
k
E
C
U
<
1
7–3
>
7.5
AP
AN
EL
15A
TA
IL
10
A
GA
U
GE
3
12
2
13
4
Y
BEL
T
H–
L
P
B
A
CC
T
R
L
Y
IN
T
B
IG
BK
L
KE
Y
12
12
9
To
Thef
tD
eter
rent
and
D oor
Loc
kE
CU
<17
–3>
I1
5
IG
N
IT
IO
N
SW
I1
6
IN
T
E
G
R
AT
IO
N
R
EL
AY
H
T
G –L
R–G
1
3
2
B–Y
G–O
1C
16
D IO
DE
1E
1
9
C 12
,C
14
A
B
6
Fro
mT
ension
Redu
cer
Sole
noid
LH<
11–7
>
From
Thef
tD
eter
ren
tan
d
D oor
Loc
kE
C U
<17
–2>
From
D ay
/N
ig
htS
hift
SW
<1
2–1>
From
Tilt
andP
ow
erT
eles
cop
ic
EC
U<
11–1
>
Y
Y
B–L
W–B
5C
4C
CC
3
11
1
1
2
7
64
28
5
1
0
GN
D
IN
T
E
G
R
A
T
IO
N
R
EL
AY
SE
AT
BE
L
T
W
A
R
N
IN
G
L
IG
H
T
[C
O
M
B.
M
E
T
E
R
]
12
345
6
10
11
12
13
17
1
8
19
2
0
21
12
34
5
6
78
9
14
15
1
6
17
18
1
2
34
5
6
78
9
10
23
22
21
20
19
15
14
13
12
11
16
C
A
B
I1
6
C1
2
C1
4
H
eadlight
and
Light
A
u
to
Tur
n
O
ff
(fo
r
U
SA
)
U
nlock
and
S
eat
B
elt
War
ni
ng
(fo
r
U
SA
)
(C
ont
.
ne
xt
pa
ge
)
2
1
1I
3
R –Y
R–
Y
C
6
C
21
Y
R
igh
t
ki
c
k
pa
nel
U
nd
er
the
c
ent
er
p
ill
ar
LH
Le
ft
k
ic
k
p
ane
l
IG
1
8
15
A
HE
A
D
RH
15
A
HE
A
D
LH
W–B
R
R
R
R
R
R
6B
a
2
Ba
1
11
5B
a
2
Ba
1
12
( w/
M
E
M
O
R
Y
)
(w/
o
M
E
M
O
RY
)
(w/
M
e
m
o
ry
)
(w
/o
M
em
or
y
)
5
6
7
8
4 LEXUS SC300(Cont’ d)
1
2
1
2
1 D
11 E
1I
10
3G
1
1B
2
3A
9
1C
10
1E
20
1H
1
9 BU1
1 Bd1
5 IG7
11 Bc1
Be1
2
1
1
2
3A
10
1
2
3
8
4
9
2
11
1
7
3G
8
3A
2
3A
1
2
1
2
1
1
4
1
2
1
2
EA
BM
BL
2 Bd1
4
1
3
8
2
10
3H
3
3C
3
3F
2
3G
5
3H
1
3F
6
1
2
1
3
2
2
9
5
1
10
F
5
G
IQ1
2
6
7
IQ1
4
12
3A
9
3E
6
3E
6
3E
6
3H
2
3H
1
3H
1
2
10
11
1
2
G
W–G
G
G
G
W–G
W–G
W–G
G
W–G
G–O
G–O
G–O
G–O
G–O
W–G
W–G
W–G
W–G
W–G
W–G
G–
W
W–B
Y
Y
G–O
G
G
W–L
G
G
G
G
W–B
W–B
W–B
W–B
G
Y
V–
G
V–
G
Y
G–
W
G–
W
W–B
GG
G
G
G
W
G–
W
G–
W
B
W–
B
R–
W
B
G–
W
G
–
W
G–
O
G–
O
W–
B
W
W–G
BR
Y–
V
L–B
L
W–B
W–
B
W–
B
W–B
W–B
G
G
W–
G
W
–
G
W–B
–PK
–STP
E
HS
+STP
E
TC
RL
RV RE ILL–
7
G–
O
G–
O
+PK
B
WRN
T
15A
STOP
F 3
LH
F 4
RH
FRONT
CLEARANCE LIGHT
L 3
LIGHT FAILURE SENSOR
RE
A
R
L
IG
H
T
W
A
R
NI
NG
L
IG
H
T
[C
O
M
B
.
M
ET
ER
]
S1
2
S
T
OP
L
IGH
T
S
W
T
o
A
B
S
E
C
U
<8
–
3
><9
–
4
>
T
o
S
h
ift
L
o
ck
E
C
U
<
1
5–
2>
G2
GL
OV
E
B
O
X
LI
G
H
T
S
W
F 5
LH
F 6
RH
FRONT SIDE
MARKER LIGHT
L 2
LICENCE
PLATE LIGHT
W–
B
W–B
W–B
H9
HI
G
H
M
O
U
NT
S
T
OP
L
IGH
T
H 8
HIGH MOUNT
STOP LIGHT
A 1
A/C CONTROL
ASSEMBLY
A15
A/C CONTROL SW
AND RADIO SW
RADIO AND PLAYER
(w/o CD Player)
R 4
RADIO AND PLAYER
(w/ CD Player)
T12
TRACTION CUT SW AND
SEAT HEATER SW
C11
CIGARETTE LIGHTER
A21
A/T INDICATOR LIGHT
E 8
ECT PATTERN
SELECT SW
T15
TRIP SW AND THEFT DETERRENT
INDICATOR LIGHT
R 9
RHEOSTAT
G1
GL
OV
E
B
OX
5
5
1
3
1
3
W–B
W–B
W–B
W–B
W–B
R–
W
G–
R
R–
W
G–
R
G–
R
TAIL AND
STOP LIGHT
[REAR COMB.
LIGHT]
R10
LH
R11
RH
TA
IL
ST
O
P
TA
IL
ST
O
P
T
o
E
ng
in
e
an
d
E
C
T
E
C
U
<
2–3
>
T
o
T
ra
ct
ion
E
C
U
<
8–
8>
T
o
C
rui
se
C
on
tr
o
lE
C
U
<
1
6–
4>
To Cruise control
ECU<16–4>
T
o
P
o
we
r
S
e
a
t
E
CU
(Dri
ve
r’
s
)<
1
1–5
>
G–
W
G–W
( *
1
)
( *
2
)
( *
2
)
(*1)
C1
3
,
C
1
4
ED
H
H
H
H
I
3C
1
17
2
3
4
5
COMBINATION METER
C12
, C14
I
H
R 5
, R 6
F
G
1 2
3 4
5 6 7 8 9 10
1
2
3 4 5 6
RADIO AND PLAYER(w/o CD Player)
Taillight and Stop Light(for USA)
Illumination(for USA)
*2 : (w/o Rear Spoiler)
*1 : (w/ Rear Spoiler)
W
G–
W
G–
O
Front side of
right fender
Under the
center pillar RH
Back panel center
2
3
G
W–
G
H 7
HAZARD SW
10 11 12 13
17 18 19 20 21
1 2 3 4 5
6 7 8 9
14 15 16
17 18
1
2 3 4 5
6 7 8 9 10
23
22
21
20
19
15
14
13
12
11
16
C12
I
C14
H
COMBINATION METER
REAR LIGHT WARNING
LIGHT[COMB. METER]
OVERALL ELECTRICAL WIRING DIAGRAM
1
2
34
5
LEXU
S
SC
30
0
1J
7
22
2
2
1
J
81
B
2
4
1B
5
1B
4
1K
11
22
22
2
2
44
1I
1E
3
1
4
2
3
4
1
2
2
3
1
5
4
AC
C
IG
1
ST
1
AM
1
3
2
1
2
1
2
1
2
1
2
19
IE
1
1
2
IE
1
11
IE
1
5I
E
1
6I
E
1
9I
G
1
4
7
6
4
15
1
9
21
1
3
16
2
0
22
2
18
4
97
3
1
3
6
7
IJ
8I
G
1
1J
5
3A
1E
1C
1A
1I
15
1C
1F
1K
3D
7B
1A
2
1
9
10
BK
IF
1H
1
K
1J
1E
W–
B
Y
Y
G–
O
G
G
W–
L
Y
Y
W–B
R
W–B
W
–
B
R–
Y
W–
G
G–
W
W–
L
W –L
W–L
W
W –B
R–W
W –B
W–B
R
R
LG–B
G–W
L–W
P–B
G–L
R –W
R –W
BR–
W
B–L
B–L
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
R–W
R–W
R
W–B
R–B
R –W
R –W
R–G
R
W
G –W
G –W
R
R
R
W
P–L
W
G
G
P–L
B–Y
W
R –Y
R–L
R
Y
V
Po
w
e
r
S
our
c
e
F9
FU
S
E
B
L
O
C
K
60A
MA
IN
100A
AM
1
120A
ALT
22
W
R–Y
TH
15
A
HE
A
D
LH
–L
W
R
15A
H E
AD
R H
–LW
R
15A
H E
AD
R H–
UPR
15A
HE
AD
LH
–U
PR
40
A
IG
S
W
H3
LH
H4
R H
H2
R H
H1
LH
HEA
D LI
GH
T(
LO)
HEA
D LI
GH
T(
H I)
D IMME
R
R E
LA
Y
HEA
D LI
GH
T
RELA
Y
From
C onne
rrin
gLi
ght
Rel
ay<
8–7>
D IO
DE
10A
D O
ME
7.5
ARA
DIO
N o.
2
LIG
H T
CO NT
RO L
D IMME
R
OF
F
TA
IL
HE
A
D
LO
W
HI
G
H
FL
A
S
H
E
D
H
L
HU
HF
E
L
T
H
C1
5
CO
M
B
IN
A
T
IO
N
SW
BA
TTER
Y
C13
HIG
HBEA
M
IN
DIC
AT
OR
LIG
H T
[C O
MB
.
M E
TE
R ]
To
Door
Lock
Mot
ora
nd
U nl
ock
Det
ect
io
nS
Wa
nd
D oo
rO
pen
D et
ect
ion
SW
LH
<1
7–1>
To
Door
Lock
Mot
ora
nd
U nl
ock
Det
ect
io
nS
Wa
nd
D oo
rO
pen
D et
ect
ion
SW
R H
<1
7–1>
Fro
mO
penD
oor
Warn
ing
Lig
ht
Fro
mP
erson
alLi
ght<
6–2
>
B4
BAC
KLE
SWL
H
I15
UN LO
CKW
AR
NIN
GS
W
[IG
NIT
ION
SW
]
SEAT
BELT
WA
RN
IN
G
LIG
HT
[C
O M
B.
MET
ER]
51
1
8
TAIL
LIG
H T
RELA
Y
T
o
T
hef
t
D
e
ter
ren
t
and
Do
o
r
L
o
c
k
E
C
U
<
1
7–3
>
7.5
AP
AN
EL
15A
TA
IL
10
A
GA
U
GE
3
12
2
13
4
Y
BEL
T
H–
L
P
B
A
CC
T
A
IL
IN
T
B
IG
B
KL
KEY
12
2
9
To
Thef
tD
eter
ren
t
and
D oor
Loc
kE
C U
<1
7–3>
I1
5
IG
N
IT
IO
N
SW
I1
6
IN
T
E
G
R
AT
IO
N
R
EL
AY
DI
M
TO
U
T
HF
HU
Y–B
R–L
CH
G
–
P
K
B
Y–G
B
From
Alte
rn
ato
r”
L”<
1–2>
Fro
mP
arki
ngB
rak
eS
W<
21–
2>
1
3
2
B–Y
G –O
1C
16
D IO
DE
1E
1
9
C 12
,C
14
A
B
6
Fro
mT
ension
Redu
cer
Sole
noid
LH<
11–7
>
From
Thef
tD
eter
ren
tan
d
D oor
Loc
kE
C U
<17
–2>
From
D ay
/N
ig
htS
hift
SW
<1
2–1>
From
Tilt
andP
ow
erT
eles
cop
ic
EC
U<
11–1
>
Y
Y
W–B
1
2C
1
1C
5C
CC
C
CC
4
C
2
C
9
8
7
10
13
11
1
1
2
7
64
2
8
1
0
5
GN
D
IN
T
E
G
R
A
T
IO
N
R
EL
AY
SE
AT
BE
L
T
W
A
R
N
IN
G
L
IG
H
T
[C
O
M
B.
M
E
TE
R
]
10
11
12
13
17
1
8
19
2
0
21
12
34
5
6
78
9
14
15
1
6
17
18
1
2
34
5
6
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст