Lexus SC300 / Lexus SC400. Manual — part 993
OVERALL ELECTRICAL WIRING DIAGRAM
1
2
34
12
LE
XU
S
S
C
300
2
1B
5
1F
9
2
1F
8
1I
15
6
237
2
1
4
11
1B
2
1D
91
J
21
I
7
10
8
9
5
1
4
1
1
IF2
3
IF
2
1
1
IP
1
3
IP
1
2
IP1
M
12
M
12
1D
10
1
J
1
1F
6
IF
51
42
3
W–
B
W–B
W
W
W–L
Y
Y
5213
4
R
R
L–W
L–R
L–Y
L–B
W–B
R
W–B
G –Y
R–L
G–W
L
L
L
Y–R
W–L
W
W–B
R
G –Y
R
G–Y
R –L
G –W
L
G–W
R–L
W–B
W–B
10
A
DO
M
E
W –L
W
1
2
R
60A
M A
IN
120A
ALT
100A
AM
1
F9
FU
S
E
B
L
O
C
K
D4
D AY/N
IG
HT
SH IF
TS
W
IN N
ER
MIR
R O
R
M2
M
O
O
N
RO
O
F
CO
N
T
RO
L
R
E
L
A
Y
M3
MO
O
N
R
O
O
F
CO
N
T
RO
L
S
W
POW
ERW
IN
D O
W
R E
LA
Y
P5
PO
W
E
R
W
IN
D
O
W
M
AST
E
R
S
W
AN
D
DO
O
R
L
O
CK
C
O
N
T
RO
L
S
W
L
H
BA
T
T
E
R
Y
To
Unlo
ck
War
nin
g
SW
<4–4
><5–4
>
Fro
mT
hef
tD
eter
rent
and
D oor
Lock
EC
U <
17–3>
P7
PO
W
ER
W
IN
D
O
W
MO
T
O
R
R
H
P6
PO
W
E
R
W
IN
D
O
W
MO
T
O
R
L
H
P4
PO
W
ER
W
IN
D
O
W
CO
NT
R
O
L
S
W
R
H
L
L
30
A
PO
W
ER
PO
W
ER
MA
IN
R
E
L
A
Y
W–B
Po
we
r
S
our
ce
Liqui
d
C
ryst
al
Inner
R
ear
V
iew
M
ir
ror
M
oon
R
oof
P
ow
er
W
indow
O P
EN
C LO
SE
UP
D O
WN
1
7
45
8
9
8
B
Z
1
7B
Z
1
6B
Z
1
2B
Z
1
V
P
P–L
V–W
N O
.2
N O
.1
M
4B
Z
1
5
B
Z
1
B–Y
W–B
45
13
2
6
B
6
BR
LG
W
W–Y
B
W–B
W–B
W–B
1B
Z
1
12
L
M4
M OON
RO
OFM
O T
O R
AN
DL
IMIT
SW
BZ
1
3
L
R
WI
N
D
O
W
LO
C
K
3
2
5
1
B
Le
ft
k
ic
k
pa
n
el
1
2
5
1F
R
1
2
3
4
13 LEXUS SC300
4
ACC
IG1
ST1
AM1
2
1J
7
2
1J
5
4
1B
4
2
4
4
1H
16
8 IE1
9 IE1
M
1
1
3
4
3
2
6
5
3
2
14
M
2
1
4 IE1
3 IE1
6 B
7 A
8 B
17 B
14 A
13 A
1J
1
1K
6
IF
L
L–W
L–R
R–L
L
W–B
B
G–R
WW
W–
L
W
B–
Y
W
B–
Y
L
L–
R
L–
W
L
B
G–
R
G–
R
B
WW
W–
B
L
G–
O
G
–
O
L
W–B
W–
B
20A
WIPER
25A
HAZ–HORN
I15
IGNITION SW
40A
IGSW
60
A
M
A
IN
10
0A
A
M
1
12
0A
A
L
T
F 9
FUSE BLOCK
HORN
RELAY
C1
5
HO
R
N
S
W
[C
O
M
B.
SW
]
T
o
T
hef
t
D
e
ter
ren
t
and
D
o
or
L
oc
k
E
C
U
<
17
–3
>
1
1
HO
RN
H 5
LH
H 6
RH
BATTERY
W 5
WIPER MOTOR
WIPER RELAY
OFF
MIST
INT
LOW
HIGH
WASHER
INTTIME
+2
+1
S
B
B1
IN1
IN2
W
E
WIPER AND WASHER SW
[COMB. SW]
W 2
WASHER
MOTOR
Power
Source
Wiper and Washer
B
6
7
4
WIPER AND WASHER SW
[COMB. SW]
C15 B , C16
A
C15 B
C16
A
Horn
1
10 11 12 13
17 18
9
8
4
3
2
5 6 7
14 15 16
1
2
8
9 10 11 12 13 14
7
6
5
4
3
Left kick panel
5
6
OVERALL ELECTRICAL WIRING DIAGRAM
1
2
34
14
LE
XU
S
S
C
300
1J
41
J
7
1J
5
2
44
11
1B
4
44
1K
13
4
1A
52
22
3
1
4
2
3
2
4
1
5
22
13
IE
1
2B
b
1
10
IG
2
16
IG
1
32
32
4
AC
C
IG
1
ST
1
AM
1
3
2
2
1
IF
BL
B
k
EB
4B
b
1
3H
14
1E
18
3A
1
11
32
32
1B
1
1J
8
3A
5
1D
11
H
4
1C
7
1E
2
3F
5
4I
P
2
10
B
c
2
20
IP
1
4
1
2
2
IJ
BL
B
B
W–
B
W
W–L
B
W
B
B
B
B–R
B
B
W–B
W–B
W–B
W–B
W–B
G
L
R –Y
R –Y
B
R –Y
W –B
W–B
W–B
W–B
W–B
W–B
L
G
G
L
R–L
L–R
B
L–R
L–R
B
W –B
W–B
W –B
W–B
W–B
W–
B
L–R
P–
L
L–R
B
B
P–L
B–Y
B–
Y
120A
ALT
100A
AM
1
F9
F
U
SE
BO
X
4
3
I1
5
IG
N
IT
IO
N
S
W
40
A
IG
S
W
15
A
EC
U
–
IG
15
A
SE
AT
–
H
T
R
SEAT
H E
ATA
ER
SW
S18
SEAT
HE
ATER
RH
(fo
rD
rive
r’s
Sea
tC
ush
ion
)
S16
SEAT
HE
ATER
LH
(for
Pas
sen
ger’
sS
eatC
ushi
on)
SEAT
HE
ATER
RELA
Y
W
Y
W
Y
W–
B
ToA
/C
Con
tro
l
Ass
em
bly
<2
2–7>
BA
T
T
E
R
Y
S17
SEAT
H E
ATER
R H
(fo
rD
rive
r’s
Seat
Bac
k)
S15
SEAT
H E
ATER
LH
(fo
rP
asse
nge
r’
s
Seat
Bac
k)
D
E
F
O
GGE
R
RE
L
A
Y
10
A
HT
R
50
A
D
E
F
O
GGE
R
10
A
M
IR–
HT
R
4
3
LH
RH
MIR
R O
RH
EA
TE
R
[R
EM
O TE
C ON
TR
OLM
IR
R OR
]
C2
2
CH
O
K
E
CO
IL
R E
AR
WIN
DO
W
D E
FO
G G
ER
C11
CIG
ARE
TT
E
LIG
H T
ER
15
A
CI
G
N2
NO
IS
E
FIL
T
E
R
(f
or
D
ef
ogge
r
S
ys
tem
)
Po
we
r
S
our
ce
S
eat
H
eat
er
R
ear
W
indow
D
ef
ogger
and
M
ir
ror
H
eat
er
C
igar
et
te
Li
ght
er
6
54
L
ef
t
ki
ck
pa
nel
U
nd
er
the
ce
nt
e
r
pil
lar
RH
Un
d
e
r
th
e
ce
nt
e
r
p
ill
ar
LH
F
ront
s
ide
o
f
lef
t
fend
er
U
n
der
the
ce
n
te
r
p
ill
ar
R
H
R
ig
h
t
k
ic
k
p
anel
2
1
1
1J
10
1D
8
3F
2B
a
2
Ba
1
14
5B
a
2
Ba
1
12
*
1
*
2
*
1
*
2
3
BY1
2
BU
1
5B
7A
10
A
3
A
3B
4
B
1
B
8
A
(A/
T
)
(M/
T
)
(A/T
)
(M/
T)
*
2:
( w
/o
M
em
or
y
P
o
w
er
S
e
at
)
*
1:
(w/
M
e
m
o
ry
P
o
w
e
r
S
e
a
t)
L
G
W–B
( *
3
)8E
8E
5F
( *
4
)5F
4F
7E
( *
4
)4F
( *
3
)7E
( *
3
)
( *
4
)
( *
3
)
( *
4
)
*
3:
( w/
M
e
m
o
ry
)
*
4:
(w/
o
M
e
m
o
ry
)
98
76
4
32
1
5
54
2
1
3
E
R1
6
,
R
1
7
F
R1
6
,
R
1
7
M
IRR
O
R
HE
A
T
E
R
[R
E
M
OT
E
C
ON
R
T
OL
M
IR
R
OR
]
M
IRR
O
R
HE
A
T
E
R
[R
E
M
OT
E
C
ON
R
T
OL
MI
R
R
O
R
]
1
234
56
12
3
4
5
6
10
11
789
B
(A/T
)S2
4
A
(M/
T
)T1
2
S24
B
,T
12
A
SE
AT
H
E
AT
AE
R
S
W
1C
1D
R14
C
,R
15
D
( *
3
)
( *
4
)
L
B
1
1
C
R1
4
D
R1
5
RE
A
R
W
IN
DO
W
DE
F
O
G
G
E
R
R1
7
R 16
E
F
EF
1
2
3
4
15 LEXUS SC300
4
ACC
IG1
ST1
IG2
AM1
3
2
6
11 AM2
1J
7
1J
8
1J
5
1J
3
1B
4
1E
2
1E
17
1I
9
1G
6
1G
10
3G
6
3A
5
7 IG2
16 IJ2
6
IJ2
16 IE1
4
9
14
13
1
6
4
2
3
3
1
5
13
8
4
5
3
2
4
7
8
3H
15
3A
1
12 IG1
1
2
IJ
IF
4
1G
18
1E
13
1H
3
1G
1
IJ
1B
2
1G
1
1E
13
6
11
1
2
1
1
10
11
10
12
9
1G
7
1G
9
3D
11
1E
3
1E
4
3A
3
3A
7
1
2
SPIRAL
CABLE
11
12
4
5
23 IK1
10 IK1
3B
2
3E
10
3E
3
3H
12
7
5
14
2
W
W–R
W–B
W–B
W–B
P–L
B–Y
B–O
L–
R
L–
R
L–
R
B–
R
B–
R
L–
R
B–
O
W–
R
W–
R
W–
L
B–
O
B–
Y
P–
L
W–
B
P
LG
–
B
LG
–
R
W–
B
W–
B
R
W
GR
B
Y
L
P–
B
B–
Y
B–
Y
B–
Y
P–
B
B–
Y
P–
B
B–
Y
P–
B
B–
Y
P–
B
W–
B
W
–
B
V
P
LG
–
B
LG
–R
G–
W
V
W–
B
W–
B
W
W–R
W–
L
W–
L
W–
L
W
W–
R
40A
IGSW
15A
ECU–IG
15A
CIG
I15
IGNITION SW
10
0A
A
M
1
12
0A
A
L
T
30
A
A
M
2
30
A
IN
J
SH
IF
T
L
O
C
K
SO
L
E
N
O
ID
SH
IF
T
L
O
C
K
CO
NT
RO
L
S
W
F 9
FUSE BLOCK
S10
SHIFT LOCK ECU
P 2
PPS ECU
P1
PPS
SO
L
E
N
O
ID
STP
KLS+
E
E
SPD
SOL+
SOL–
L–R
L
G–R
G
G–W
I15
KEY INTERLOCK
SOLENOID
[IGNITION SW]
From Stop Light SW
<4–6><5–6>
F
rom
C
o
m
b
in
at
io
n
M
et
e
r<
2
1–5
>
BATTERY
E1
E2
+SL
–SL
+SR
–SR
D+
D–
TC
LA
+B
IG2
ACC
+B
IG
ACC
SLS+
SLS–
PT
P–
P2
7. 5A
IGN
15A
ECU–B
C12
AIRBAG
WARNING
LIGHT
[COMB. METER]
F 1
FRONT AIRBAG
SENSOR LH
F 2
FRONT AIRBAG
SENSOR RH
A29
AIRBAG SQUIB
T 6
TDCL
(Total Diagnostic
Communication Link)
C 3
CHECK CONNECTOR
TC
AB
TC
AB
Power Source
Shift Lock
PPS
SRS Airbag
C10
CENTER AIRBAG SENSOR ASSEMBLY
Right kick panel
Left kick panel
3
4
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