Lexus SC300 / Lexus SC400. Manual — part 991
OVERALL ELECTRICAL WIRING DIAGRAM
1
2
34
6
LEXU
S
SC
30
0
2
3A
6
2
1F
81
H
91
D
61
H
10
1E
11
3D
4
2
1
2
1
2
1
2
1
2
1
6
22
12
11
3
7
11
A
12
B
4B
X
1
1
7
IP
1
25
B
c
1
1F
6
1J
1
IF
1
To
Int
egrat
io
nR
ela
y
<5–3
><
4–3>
1
2
5
1B
W–B
W–
B
RR
W
W–B
W–B
W–B
W–B
BR –W
R–W
R–W
R
R
R
R
R
R
R
R
R
R
R
R
R
R –W
R–W
R –W
R–W
R –W
R –W
R–
W
R
R–
W
W
R
10
A
DO
M
E
60A
M A
IN
F9
F
U
SE
BL
O
C
K
VAN
IT
YL
IG
HT
V5
LH
V6
RH
P2
0
PE
R
S
O
N
A
L
LI
G
H
T
LH
RH
ON
OFF
DOO
R
I14
IGN
ITIO
NKE
Y
C Y
LIN
DE
RL
IG
HT
S11
STEP
LIG
HT
D5
DO O
RCO
UR T
ES
Y
LIG
HT
LH
L7
LU
GGAGE
COM
PA
RT
ME
NT
LIG
H T
D6
DO O
RCO
UR T
ES
Y
LIG
HT
RH
To
Door
Lock
Mo
tor
,
D oo
rU
nlo
ck
D et
ect
ion
SW
and
D oo
rO
pen
D et
ect
ion
SW
LH
<1
7–5>
Fro
mC
DA
uto
m at
ic
Chen
ger
<2
0–1>
4o
D oor
Lock
M ot
or,
D oo
rU
nlo
ck
D et
ect
ion
SW
and
D oo
rO
pen
D et
ect
ion
SW
R H
<1
7–5>
To
Int
egrat
io
nR
ela
y
<5–3
><
4–3>
L6
LU
GGAGE
COM
PA
RT
ME
N T
LIG
H T
SW
O
PEN
D
O
O
R
W
A
R
N
IN
G
L
IG
H
T
[C
O
M
B
.
M
ET
ER
]
BA
T
T
E
R
Y
Po
w
e
r
S
our
ce
Int
er
ior
Li
ght
W
From
The
ft
Det
err
ent
and
Door
Lock
EC
U
<17
–2>
R–W
C1
2
,
C
1
4
BA
O
P
E
N
D
O
O
R
W
A
RN
IN
G
L
IG
HT
[C
O
M
B
.
M
E
T
E
R
]
10
1
1
12
13
17
1
8
19
2
0
21
12
34
5
6
78
9
14
15
16
17
18
1
2
34
5
6
78
9
10
23
22
21
20
19
15
14
13
12
11
16
B
A
C1
2
C1
4
Lef
t
ki
c
k
pa
nel
W–
B
(w
/o
Moo
nR
oof
)
(w
/M
oonR
oof
)
1
2
3
4
7 LEXUS SC300
4
ACC
IG1
ST1
AM1
2
1J
7
1J
5
1B
4
1E
7
2
7
4
6
1
2
4
5
3
2
1C
4
1A
7
2
3
EB
6
5
12 IQ1
10 IQ1
11 IQ1
10 IG1
23 IG1
IG2
8
IG2
9
IE1
9
IQ2
3
IQ2
13
IQ2
8
1H
11
1H
7
4
4
4
4
4
12
4
3
1E
19
1E
14
1C
3
1A
4
3A
1
1J
1
3G
3
1E
18
IF
BM
EA
10
3D
6
1K
2
3
23 B
16 A
17 A
5
7
5
6
6
3
10
8
9
4
W
W
W–R
R–B
R–W
G–Y
G–B
W–R
G–R
W
W
W–B
G–R
W–R
R–B
R–W
R–W
R–B
W–B
G–
R
B–
Y
W
R–
W
R–
B
R–
W
R–
B
R–
B
R–
W
W–
B
R–
B
R–
W
G–
Y
G–
Y
G–
B
G–
B
W–B
W–B
W–B
W–B
W–B
W–
B
W–
B
W–B
W–B
G–
B
G–
Y
WW
W–L
W
W
B–
Y
60
A
M
A
IN
10
0A
A
M
1
12
0A
A
L
T
I15
IGNITION SW
20A
TURN
25A
HAZ–HORN
TU
R
N
S
IG
N
A
L
FL
A
S
H
E
R
B
A
TTE
R
Y
F7
F
RO
NT
T
UR
N
S
IG
NA
L
LI
G
H
T
LH
R1
0
R
E
A
R
T
U
R
N
SI
G
N
AL
L
IG
H
T
L
H
[R
E
A
R
C
O
M
B.
L
IG
H
T
L
H
]
R1
1
R
E
AR
T
U
R
N
SIG
N
AL
L
IG
H
T
R
H
[R
E
A
R
C
OM
B
.
L
IGH
T
R
H
]
F8
F
RO
NT
T
UR
N
S
IG
NA
L
LI
G
H
T
R
H
C1
6
T
U
R
N
SI
G
N
AL
SW
[C
O
M
B.
SW
]
T
U
R
N
SIG
N
AL
IN
D
IC
A
T
O
R
L
IG
H
T
[C
O
M
B
.
M
ET
ER
]
OFF
ON
B1
F
B2
TL
TB
TR
H7
HA
Z
A
RD
S
W
B
FOD
FOE
FOG
FOF
1I
1
1I
2
5
5
5
5
2
1
5
3
18 IE1
17 IE1
1
2
1
2
EA
8
11
10
W–G
G–
R
G–
R
W–
B
W–
B
W–B
R–
G
P–
Y
R–
G
P–
Y
R–
Y
T
o
Int
eg
rat
ion
R
el
ay
<5
–
2
><4
–
2
>
CORNERING
LIGHT RELAY
C16
CONERING LIGHT
SW[COMB. SW]
CO
RN
E
R
IN
G
L
IG
HT
C 6
LH
C 7
RH
F 9
FUSE BLOCK
Power
Source
Cornering Light
Turn Signal and Hazard Warning Light
40A
IGSW
TURN SIGNAL INDICATOR LIGHT
[COMB. METER]
1 2
3 4
5 6
7 8
9 10
11 12 13 14 15 16
17 18
17 18
1
2 3 4 5
6 7 8 9 10
23
22
21
20
19
15
14
13
12
11
16
A
B
C13
C14
C1
3
A
,
C1
4
B
Front side of
right fender
Front side of
left fender
Back panel
center
Front side of
right fender
Left kick
panel
6
5
OVERALL ELECTRICAL WIRING DIAGRAM
1
2
34
8
LEXU
S
SC
30
0
(C
ont
.
ne
xt
pa
ge
)
4
AC
C
IG
1
ST
1
AM
1
2
1J
7
66
66
66
6
6
21
J
5
1B
4
66
66
66
66
6
6
2
1
I
8
4
3
5
4
2
4
3
2
1
4
3
2
1
6
4
3
1
7
1
124
1
F
2F
3F
AAB
A
A
A
B
C
B
A
B
A
A
A
A
A
A
BAA
BA
ABB
B
A
A
A
A
A
B
GG
G
F
F
F
M
1
5
2
1
2
1
25
2
1
24
10
1
9
1
1
32
61
28
7
2
22
1
3
5
1
8
1
6
1
7
4
4
7I
E
2
1I
O
1
2
3
1
2
1
6
EB
E
A
IJ
M
2B
c2
12
IE
2
H
4H
5H
6H
1H
2H
3
I
2I
1J
1
S
F
R
S
F
L
SR
R
S
R
L
AS
T
M
T
BS
R
BS
M
BSA
BS
B
M
G
N
D
E2
PR
VC
SR
C
SM
C
S
AC
MT
T
BT
M
EM
2
B
BBB
B
B
B
C
C
C
C
C
C
C
C
C
C
C
B
B
C
9I
O
1
EB1
6
10
IO
1
3B
W
1
8B
W
1
6B
c2
5
B
c
2
2B
W
1
6B
W
1
7B
W
1
3B
1
22
1
1
11
2
2
32
0
741
3
61
5
1
1
7
81
2
1
4
51
0
15
5
1
4
3
8
6
17
SF
R
SF
L
SR
R
S
R
L
AS
T
M
T
G
N
D
1
G
N
D
2
G
N
D
3
F
L
+
F
L
–
F
SS
F
R
+
F
R
–
R
L
+
R
L
–
R
SS
R
R
+
R
R
–
AL
T
L
VL
1
P
KB
W
B–
Y
B–
R
B–
R
R
V
L
P–
B
V–
W
R–
B
P
Y–
B
LG
LG
–
B
P–
L
P–
G
V–
R
L
GR
B
R–
W
W–B
( SH
IEL
D
ED
)(
SH
IE
L
D
ED
)
B–
R
B–
R
W–
B
L
–
Y
G
V–
Y
R–
W
W–
B
M
T
T
S
R
M
R
T
M
R
E2
P
R
VC
S
R
C
SM
C
SA
C
T
SR
R
–
BA
T
IG
ST
P
TS
WA
TC
D
/G
A
B
S
O
RL
O
RR
O
FL
O
FR
O
BR
F
A
TH
F
A
BR
C
BR
P
TR
C
O
NL
P
W–L
R
Y
W
W
L–W
B–R
R–B
L
Y
R
V–Y
V–Y
V–Y
W
B–Y
R
R–W
R
B–R
B–R
R
G –W
G–W
B–Y
L–Y
R –B
Y
G
(SH
IE
LD
ED)
W
B
R
V–Y
V
V–W
R–
W
R–W
R–W
B–R
V–Y
W
W –L
V
L
P–B
W–B
W–B
W–B
L–W
Y–G
P–B
P
B–Y
Y
L–W
L
W–B
W–B
W–B
W
B
O–L
W–L
W
O
O
W
W
O
L–G
L–Y
L–G
L–Y
Y–G
Y–G
B
R–W
L
R–W
B–Y
V–R
P–G
P–L
LG –B
LG
Y–B
P
R –B
R–B
V–W
B–R
B–R
V–Y
W–B
W–B
(SH
IELD
ED )
(SH
IEL
D E
D )
(SH
IE
LD
ED )
I1
5
IG
N
ITIO
N
SW
40
A
IG
S
W
4
2
14
56
R
T5
TR
A
C
TIO
N
P
U
M
P
A
N
D
M
OT
OR
T
R
AC
T
IO
N
BR
AK
E
AC
T
U
A
T
O
R
AB
S
AN
D
T
R
A
C
T
IO
N
EC
U
60A
M A
IN
30A
AB
SN
O.
2
60A
ABS
N O
.1
100A
AM
1
ABS
AC T
U AT
OR
RELA
Y
ABSM
OT
OR
RELA
Y
TRA
CTI
ON
MO
TOR
RELA
Y
TRA
CTI
ON
BR
AK
E
MAIN
RE
LA
Y
10A
D O
ME
6
BA
T
T
E
R
Y
A
B
S
A
CT
UA
T
O
R
(SH
IE
LD
ED )
W–B
A7
ABS
SP
EE
D
S
EN
S
O
R
FR
O
N
T
L
H
A8
AB
S
S
PEE
D
S
EN
SO
R
FR
O
N
T
R
H
A3
0
AB
S
S
PEE
D
S
EN
SO
R
RE
A
R
L
H
F9
FU
S
E
B
L
O
C
K
B–
Y
F
ro
m
S
top
Li
gh
t
S
W
<4
–
6
><5
–
6
>
5B
W
1
A3
1
A
BS
S
PE
ED
SE
N
S
O
R
RE
A
R
RH
From
Alte
rn
ator
”L”
<1–
2>
Po
we
r
So
u
rc
e
A
B
S
and
T
ract
ion
C
ont
rol
B–
R
15A
EC
U–I
G
Y
2
3
22
16
9
2
0
1
0
1
9
T3
,
T4
FG
(SH
IE
LD
ED )
A4
,
A5
,
A
6
HJ
I
A2
4
A
,
A
2
5
B
,
A
2
6
C
W
120A
ALT
R
Fr
o
n
t
s
id
e
o
f
le
ft
fe
n
d
e
r
R
ight
ki
ck
pan
el
F
ront
si
de
of
ri
g
ht
fende
r
1
3
5
6
7
8
8 LEXUS SC300(Cont’ d)
22
11
4
14
8
17
16
23
1B
5
3A
6
3E
3
3B
3
1E
11
3H
12
18 IK2
15 IK2
12 IJ2
7 IO1
8 IO1
9 IK2
5 IK2
4 IK2
2 IK2
10 IK1
23 E
BRP
4 E
TRCO
1 D
BRC
5 E
THFA
4 D
BRFA
10 D
FRO
3 D
FLO
12 D
RRO
5 D
RLO
15 D
ABSO
8 D
BAT
2 E
IG1
6 D
TC
16 E
TR5
11 D
IND
14 D
WT
5
K
15
K
1
K
7 D
P
16 D
N
1 E
PKB
13 IK2
3H
7
From A/T Indicator SW
[NEUTRAL START SW AND
BACK–UP LIGHT]<3–7>
26 E
BCM
25 E
B–
24 E
B
11 E
A
12 E
A–
13 E
ACM
14 E
GND
13 D
CSW
3 E
S1
15 E
BM
2 D
STP
21 E
TR2
6 E
NEO
8 E
VTH
19 E
VSH
10 E
IDL1
22 E
IDL2
6
2
16 IK2
13 IJ1
3H
14
1E
18
3A
2
1J
1
IJ
IF
EE
2
1
3
6
4
5
BCM
B–
B
A
A–
ACM
1J
5
2
3A
4
3D
13
1E
12
2
13
14
5 EE1
1
L
T
o
E
n
gi
ne
a
nd
EC
T
EC
U
<
2
–
8
>
10A
GAUGE
7. 5A
TRAC
F
ro
m
S
top
Li
gh
t
S
W
<5
–
6
><4
–
6
>
F
rom
T
ro
tt
le
P
os
ition
S
e
ns
o
r<
2
–8
>
F
ro
m
S
u
bT
h
ro
tt
leP
o
s
iti
o
n
S
e
ns
o
r<
2
–8
>
W
B–Y
L
V–R
P–G
P–L
LG–B
LG
Y–B
P
R–B
V–W
P–B
L
V
R
B–R
B–R
R–W
L
GR
B
R–W
GR
L
V–W
P–B
WA
TC
TC
ABS W
TRC
B–
Y
V–
R
P–
G
P–
L
LG
–
B
LG
Y–
B
P
R–
B
R
B–
R
RR
R–
B
B–Y
W
L–
R
Y
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