Lexus SC I (1991-2001) (dash harn, lower right end of dash) Wiring diagrams

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 GRD 1 2 3 4 5 6 7 8 9 10 TO ACT- ACT+ ACTD PRLY IG BLK WIRE BLK/ WHT WIRE BLK/RED WIRE BLK/WHT (OR RED/BLK) WIRE BLK/WHT WIRE BLU WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN (OR GRN/WHT) WIRE BRN/WHT WIRE BZR CIG FUSE DIODE DOME FUSE DOOR FUSE DSWD DSWL DSWP KSW LSWP ECU-IG FUSE ENGINE HOOD COURTESY SWITCH (CENTER FRONT OF ENGINE COMPARTMENT) GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HEADLIGHTS SYSTEM HORN RELAY HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR ACCY HOT IN RUN OR START INTEGRATION RELAY JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) KSW LSWD LSWP IG CTY LEFT FRONT DOOR KEY LOCK/UNLOCK SWITCH LOCK LUG HEAD SH IND TSW DSWH LSWD LUGGAGE COMPARTMENT LIGHT SWITCH (CENTER REAR OF TRUNK) MASTER POWER WINDOW/DOOR LOCK CONTROL SWITCH PNK WIRE POWER MAIN RELAY POWER CIRCUIT BREAKER RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) RIGHT FRONT DOOR KEY LOCK/UNLOCK SWITCH RIGHT FRONT DOOR LOCK CONTROL SWITCH STARTER RELAY TAIL HORN SRLY TAILLIGHT RELAY THEFT DETERRENT, DOOR LOCK ECU (BEHIND INSTRUMENT CLUSTER) UL +B UNLOCK VIO WIRE WHT (OR GRN) WIRE WHT WIRE WHT/BLK WIRE WIRELESS DOOR LOCK BUZZER (AT LEFT SIDE OF ENGINE COMPARTMENT, NEAR STRUT TOWER) YEL GRN/ WIRE YEL WIRE YEL/GRN WIRE YEL/RED WIRE

1994 VFTC J/B 1 (BEHIND LEFT KICK PANEL) A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) A/C SINGLE PRESSURE SWITCH (RIGHT SIDE OF ENGINE COMPT) BLK WIRE BLK/RED WIRE BLU/WHT WIRE C/FAN COMBI- NATION METER COOLING FAN ECU (BEHIND RIGHT SIDE OF DASH) DATA LINK CONNECTOR 1 (AT LEFT REAR SIDE OF ENGINE) ECU-IG FUSE ENGINE CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) GRN WIRE HOT IN RUN OR START IDL TAC COOL HP TH+ TH- IDLO IGB SOL+ SOL- 2 3 4 5 6 7 8 9 10 LT GRN WIRE LT GRN/RED WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE SHORT CONNECTOR SOLENOID VALVE (COOLING FAN) (AT LEFT FRONT OF ENGINE) WHT WIRE WHT/BLK WIRE WHT/GRN WIRE

BLU/WHT WIRE BRN/WHT WIRE COMBINATION METER DOME FUSE DOOR DOOR OPEN WARNING LIGHT GAUGE FUSE GRN/BLU WIRE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START IGNITION KEY CYLINDER LIGHT INTEGRATION RELAY INTERIOR JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) LEFT DOOR COURTESY LAMP LEFT DOOR UNLOCK, DOOR OPEN DETECTION SWITCH LEFT VANITY LIGHT LUGGAGE COMPARTMENT LAMP LUGGAGE COMPARTMENT LIGHT SWITCH MAP OFF PERSONAL LIGHT PNK WIRE RADIO 2 FUSE RED WIRE RED/BLK WIRE RED/WHT WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPARTMENT BEHIND BATTERY) RELAY BLOCK 4 (BEHIND LEFT KICK PANEL, ON FRONT SIDE OF JUNCTION BLOCK 1) RIGHT DOOR COURTESY LAMP RIGHT DOOR UNLOCK, DOOR OPEN DETECTION SWITCH RIGHT VANITY LIGHT STEP LIGHT WHT/BLK WIRE

1 (OR 2) A/C CONTROL ASSEMBLY ABS ECU ABS, TRACTION ECU BLK WIRE BLK/ WHT WIRE BLOWER MOTOR CONTROL RELAY BLU/BLK WIRE BLU/RED WIRE BRN WIRE CIGARETTE LIGHTER COMBINATION METER DATA LINK CONNECTOR 3 DRIVER'S POWER SEAT CONTROL SWITCH DRIVER'S SEAT SLIDE POSITION SENSOR DRIVING POSITION MEMORY, RETURN SWITCH ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT, SEAT HEATER SWITCHES ENGINE CONTROL MODULE ENGINE CONTROL MODULE (3.0L) FROM JUNCTION FRONT VERTICAL POSITION SENSOR DRIVER'S SEAT RECLINE MOTOR FUEL LID OPENER SOLENOID GLOVE BOX LIGHT SWITCH HIGH MOUNTED STOP LIGHT JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) JUNCTION CONNECTOR J/C 2 (CENTER OF REAR SHELF) LUGGAGE COMPARTMENT DOOR OPENER SWITCH PASSENGER'S SEAT BACK HEATER PASSENGERS POWER SEAT CONTROL SWITCH POWER SEAT ECU REAR VERTICAL POSITION SENSOR REAR WINDOW DEFOGGER RED/ WHT WIRE RHEOSTAT RIGHT DOOR KEY LOCK/ UNLOCK SWITCH RIGHT DOOR LOCK CONTROL SWITCH RIGHT DOOR LOCK MOTOR, DOOR UNLOCK DETECTION SWITCH, OPEN DETECTION SWITCH RIGHT REMOTE CONTROL MIRROR SHIFT LOCK ECU TILT, POWER TELESCOPIC ECU TRACTION CUT SWITCH W/ MEMORY W/O MEMORY WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE WIRELESS DOOR LOCK CONTROL ECU

A/C CONTROL ASSEMBLY, SHIFT LOCK ECU AIR BAG SENSOR ASSEMBLY BLK/WHT WIRE BLK/YEL WIRE BLU/RED WIRE BLU/WHT WIRE CIG FUSE CIGARETTE LIGHTER DIODE DOOR FUSE ECU-B FUSE ECU-IG FUSE ENGINE CONTROL MODULE, LICENSE PLATE LIGHTS, LIGHT FAILURE SENSOR ENGINE CONTROLS SYSTEM ENGINE FUSE FROM IGNITION SWITCH (DIAGRAM 1 OF 3) FROM RAD 2 FUSE, JUNCTION BLOCK 1 (DIAGRAM 1 OF 3) GAUGE FUSE GENERATOR HAZARD SWITCH HTR FUSE HTR RELAY, MG CLT RELAY DEF RELAY, A/C CONTROL ASSEMBLY, WATER VALVE VSV IGN FUSE INTEGRATION RELAY JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) PANEL FUSE PARKING LIGHTS, FRONT SIDE MARKER LIGHTS POWER MAIN RELAY PWR FUSE STOP FUSE TAIL FUSE TAILLIGHT RELAY THEFT DETERRENT, DOOR LOCK CONTROL ECU, AIR BAG SENSOR ASSEMBLY TILT, POWER TELESCOPIC ECU, MOON ROOF CONTROL RELAY TURN FUSE WASHER MOTOR, WIPER/WASHER SWITCH, WIPER MOTOR WHT/BLK WIRE WHT/BLU WIRE WIPER FUSE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 GRD 1 2 3 4 5 6 7 8 9 10 TO ACT- ACT+ ACTD PRLY IG BLK WIRE BLK/ WHT WIRE BLK/RED WIRE BLK/WHT (OR RED/BLK) WIRE BLK/WHT WIRE BLU WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN (OR GRN/WHT) WIRE BRN/WHT WIRE BZR CIG FUSE DIODE DOME FUSE DOOR FUSE DSWD DSWL DSWP KSW LSWP ECU-IG FUSE ENGINE HOOD COURTESY SWITCH (CENTER FRONT OF ENGINE COMPARTMENT) GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HEADLIGHTS SYSTEM HORN RELAY HOT AT ALL TIMES HOT IN RUN HOT IN RUN OR ACCY HOT IN RUN OR START INTEGRATION RELAY JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) KSW LSWD LSWP IG CTY LEFT FRONT DOOR KEY LOCK/UNLOCK SWITCH LOCK LUG HEAD SH IND TSW DSWH LSWD LUGGAGE COMPARTMENT LIGHT SWITCH (CENTER REAR OF TRUNK) MASTER POWER WINDOW/DOOR LOCK CONTROL SWITCH PNK WIRE POWER MAIN RELAY POWER CIRCUIT BREAKER RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) RIGHT FRONT DOOR KEY LOCK/UNLOCK SWITCH RIGHT FRONT DOOR LOCK CONTROL SWITCH STARTER RELAY TAIL HORN SRLY TAILLIGHT RELAY THEFT DETERRENT, DOOR LOCK ECU (BEHIND INSTRUMENT CLUSTER) UL +B UNLOCK VIO WIRE WHT (OR GRN) WIRE WHT WIRE WHT/BLK WIRE WIRELESS DOOR LOCK BUZZER (AT LEFT SIDE OF ENGINE COMPARTMENT, NEAR STRUT TOWER) YEL GRN/ WIRE YEL WIRE YEL/GRN WIRE YEL/RED WIRE

BLK WIRE BLK/RED WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BRAIDED BRAIDED BRAIDED BRN WIRE CAMSHAFT POSITION SENSOR (LEFT REAR SIDE OF ENGINE) CRANKSHAFT POSITION SENSOR (RIGHT FRONT OF ENGINE) ENGINE CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) EVG 2 GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE IGNITER (ON LEFT FRONT SHOCK TOWER) IGNITION COIL 1 IGNITION COIL 2 IGNITION COIL 3 IGT INJECTOR 1 INJECTOR 2 INJECTOR 3 INJECTOR 4 INJECTOR 5 INJECTOR 6) INSTRUMENT CLUSTER SYSTEM INSTRUMENT CLUSTER SYSTEM (TACHOMETER) KNOCK SENSOR 1 (LEFT SIDE OF ENGINE) KNOCK SENSOR 2 (LEFT SIDE OF ENGINE) LT GRN WIRE M- M+ MASS AIRFLOW METER (IN AIR INTAKE DUCT) NE- NE NSW IGF NOISE FILTER (ON LEFT FRONT STRUT TOWER) POWER STEERING OIL PRESSURE SWITCH (LEFT FRONT OF ENGINE) PS OCV- OCV+ CL- CL+ RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE THA VTA THROTTLE CONTROL MOTOR (ON THROTTLE BODY) THW VPA VC HTR HTL 10 20 EVAP VSV (EVAP) (LEFT REAR OF ENGINE) VSV (ACIS) (LEFT SIDE OF ENGINE) WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE

ACCEL POSITION SENSOR (RIGHT REAR SIDE OF ENGINE) BLK WIRE BLK/BLU WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BRAIDED BRN WIRE EFI FUSE EFI RELAY ENGINE COOLANT TEMPERATURE SENSOR (LEFT FRONT SIDE OF ENGINE) FPC FUEL PUMP (IN FUEL TANK) FUEL PUMP ECU (LEFT SIDE OF LUGGAGE COMPARTMENT) GRN WIRE GRN/RED WIRE HOT AT ALL TIMES HOT W/DEF RELAY ENERGIZED HOT W/TAILLIGHT RELAY ENERGIZED HTL HTR IGN FUSE ST FUSE IGNITION SWITCH INSTRUMENT CLUSTER SYSTEM JUNCTION BLOCK 1 LOCK ON LT GRN WIRE MIRHTR FUSE P/N PARK/NEUTRAL POSITION SWITCH (ON TRANSAXLE) PNK 5 6 WIRE PNK WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RELAY BLOCK 2 SHORT CONNECTOR (BEHIND RIGHT SIDE OF DASH) STARTING/CHARGING SYSTEM TAIL FUSE THROTTLE POSITION SENSOR (ON THROTTLE BODY) WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

ABS ECU (RIGHT SIDE OF DASH) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/ YEL WIRE BLU/BLK WIRE BLU/RED WIRE BLU/YEL WIRE BRAIDED BRN WIRE COMBINATION METER ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SWITCH GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES STOP FUSE HOT IN ON OR START JUNCTION BLOCK 1 JUNCTION BLOCK 1 OBD FUSE JUNCTION BLOCK 3 MALFUNCTION INDICATOR LIGHT ORG/ WIRE PNK 5 6 WIRE PNK WIRE PWR RED WIRE RED/ BLU WIRE RED/WHT WIRE RED/YEL WIRE SNOW STOPLIGHT SWITCH (ON BRAKE PEDAL BRACKET) VAPOR PRESSURE SENSOR (RIGHT FRONT CORNER OF ENGINE COMPT) WHT RED/ WIRE WHT WIRE WHT/ BLK WIRE WHT/ BLU WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE

3 4 5 6 7 8 9 10 PNK WIRE ACCEL POSITION SENSOR (TOP CENTER OF ENGINE) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BRAIDED BRN WIRE EFI FUSE EFI MAIN RELAY ENGINE COOLANT TEMPERATURE SENSOR (RIGHT FRONT TOP OF ENGINE) FPC GRN WIRE GRN/RED WIRE HOT AT ALL TIMES HTL HTR IGN FUSE IGNITION SWITCH INJECTOR 1 INJECTOR 2 (ENGINE HARN, RIGHT SIDE OF FIREWALL) INJECTOR 3 INJECTOR 4 INJECTOR 5 INJECTOR 6) INJECTOR 7 (-) INJECTOR 8 (-) JUNCTION BLOCK 1 ST FUSE LOCK ON LT GRN WIRE P/N PARK/NEUTRAL POSITION SWITCH (ON TRANSMISSION) PNK WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) SHORT CONNECTOR (RIGHT SIDE OF DASH) STARTING/ CHARGING SYSTEM INSTRUMENT CLUSTER SYSTEM THROTTLE POSITION SENSOR (ON THROTTLE BODY) TRANSMISSION CONTROL SWITCH WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/RED WIRE