1991 LEXUS SC400 relay

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Page 3943 of 4087

LEXUS SC400 1991  Service Repair Manual 
2
INTRODUCTION
This manual consists of the following 11 sections:No.
SectionDescription
A
INDEXIndex of the contents of this manual.
A
INTRODUCTIONBrief explanation of each section.
BHOW TO USE
THIS

Page 3944 of 4087

LEXUS SC400 1991  Service Repair Manual 
108
LIGHT AUTO TURN OFF
1K
11
2 2
1D
8
IF
1J
1 1K
5
1B
2
2
1B
5
4
4
4 B
11
A
3A 6
B
12
1D10
6
4
2
47
3124
3
313
6
13
1
IE1
6 10A
GA UGE
10A
DOME
R±Y
W
W±B
R±W
W±B
W±B
R±GG±L W
W±LW
W±G
R±Y

Page 3945 of 4087

LEXUS SC400 1991  Service Repair Manual 
109
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS TO TERMINAL 7 OF THE INTEGRATION RELAY THROUGH GAUGE
FUSE. VOLTAGE IS APPLIED AT ALL TIMES TO  TERMINAL (A)4 (USA), (B)11 (CANADA) OF THE INTEGRA

Page 3947 of 4087

LEXUS SC400 1991  Service Repair Manual 
1
2
X
X X
910
D4 I15
BLACK
107
LIQUID CRYSTAL INNER REAR VIEW MIRROR
2
1F
8 1B
5 B212
RY
R
R
R
W± B
10A
DOME
FROM POWER SOURCE
SYSTEM(
SEE PAGE 56 )
INNER MIRROR UNLOCK
WARNING SW
[IGNITION SW]
D4 I

Page 3949 of 4087

LEXUS SC400 1991  Service Repair Manual 
197
1D
10 1J 11F61F 5
1I
7
BZ1
3
BZ1
8BZ1 7BZ12BZ1 6
4
W±B
W±B W±B W±B
Y±R Y±R
L±Y L±B L±R
L±W
V
P
V±W
P±L
W±B
W±B
W±B
L
R
1273 POWER MAIN
RELAY
MOON RO OF CO NTROL
RELAY
OPEN
CLOSE
DO

Page 3950 of 4087

LEXUS SC400 1991  Service Repair Manual 
198
MOON ROOF
CURRENT IS APPLIED AT ALL TIMES THROUGH POWER FUSE TO  TERMINAL 5  OF POWER MAIN RELAY AND ALSO THROUGH  DOME
FUSE TO  TERMINAL 12  OF MOON ROOF CONTROL RELAY. WITH THE IGNITION SW TURN

Page 3951 of 4087

LEXUS SC400 1991  Service Repair Manual 
199
6. TILT UP REMINDER SYSTEM
WITH THE IGNITION SW IS TURNED TO ACC OR OFF WITH THE MOON ROOF STILL TILTED UP, KEY OFF MOON ROOF OPERATION
CAUSES CURRENT TO FLOW TO TERMINAL 6 OF THE MOON ROOF CONTR

Page 3953 of 4087

LEXUS SC400 1991  Service Repair Manual 
OVERALL ELECTRICAL WIRING DIAGRAM
1234
1 LEXUS SC300 (
Cont . ne xt pa ge )
2 1
5
3
1J
7 1J
31J 5
3D
1
1B
4 1E
81H 52 2
3D
2
16 IE1
1EB2 15 IE1 3EB1
2
5IJ2 13IJ2 2EB2
1A B B
B
B
L
IG
S 1J
6
1K
4
1
C