Lexus SC I (1991-2001) (front side of left fender) Wiring diagrams

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 SFRR SFRH 1 2 3 4 5 6 7 8 9 10 11 12 MR FL- FR+ AST SFLH SFLR SR FL+ FR- MT SRH SRR ABS ACTUATOR (AT RIGHT REAR CORNER OF ENGINE COMPT) ABS ECU (BEHIND RIGHT SIDE OF DASH) ABS INDICATOR ABS MOTOR RELAY BLK WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRAIDED COMBINATION METER DATA LINK CONNECTOR 1 DATA LINK CONNECTOR 2 (BEHIND LEFT SIDE OF DASH) ECU-IG FUSE GAUGE FUSE GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN RUN HOT IN RUN J/B 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) LEFT FRONT ABS SPEED SENSOR (LEFT FRONT WHEEL ASSEMBLY) LT GRN WIRE PNK/BLK WIRE R/B 6 (ON LEFT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) ABS SOL RELAY RED WIRE RED/YEL WIRE RIGHT REAR ABS SPEED SENSOR (RIGHT REAR WHEEL ASSEMBLY) STOP FUSE STOPLIGHT SWITCH (ON BRACKET, ABOVE BRAKE PEDAL) TC RL- RR+ WA TS RL+ RR- D/G VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

1 2 3 4 PWRL 1 2 3 8 9 10 16 BATT SNWL SNWI 2 IND 3 IND 4 IND 6 11 15 20 STP PWR A/T OIL TEMP ACCELERATOR POSITION SENSOR (RIGHT REAR OF ENGINE) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE D IND EFI FUSE EFI MAIN RELAY ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SWITCH ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID (IN TRANSMISSION) ENGINE CONTROL MODULE ENGINE CONTROLS (COMBINATION METER) ENGINE COOLANT TEMPERATURE SENSOR (RIGHT FRONT OF ENGINE) GAUGE FUSE GRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR START IGN FUSE IGSW MREL +B INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) L IND LT GRN WIRE N IND NCO+ PNK WIRE NO. 1 NO. 2 NO. 3 NO. 4 O/D DIRECT CLUTCH SPEED SENSOR (ON TRANS- MISSION) OIL ORG/ WIRE P IND PNK WIRE PWR IND R IND R/B 2 (LEFT SIDE OF ENGINE COMPT) RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE SLN- SLT- SLU+ SLU+ SLN+ SLT+ NCO- SLU- SLN- SLN- SLT- SNOW IND STARTING/ CHARGING SYSTEM STOP FUSE STOPLIGHT SWITCH (ON BRAKE PEDAL BRACKET) THROTTLE POSITION SENSOR (ON THROTTLE BODY) TRANSMISSION CONTROL SWITCH (2 - L) (NEAR GEAR SELECTOR) TRANSMISSION CONTROL SWITCH (D - 4) (NEAR GEAR SELECTOR) VEHICLE SPEED SENSOR (ON TRANS- MISSION) VIO WIRE VTA THW WHT (OR GRN) WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 IGB SOL+ SOL- A/C ACMG IDL A/C CONTROL SWITCH, RADIO SWITCH A/C EVAPORATOR TEMP. SENSOR (BEHIND RIGHT SIDE OF DASH) A/C MAGNETIC CLUTCH (ON A/C COMPRESSOR) A/C ROOM TEMPERATURE SENSOR (BEHIND CENTER OF DASH) AUTO BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLOWER MOTOR (BEHIND RIGHT SIDE OF DASH) BLOWER MOTOR CONTROL RELAY (BEHIND RIGHT SIDE OF DASH) BLU WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE CIG FUSE COOLING FAN ECU (SC 400) (BEHIND RIGHT SIDE OF DASH) DATA LINK CONNECTOR 1 (DLC) (PARTIAL) (AT LEFT REAR SIDE OF ENGINE) DEF RELAY ENGINE CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) GND B+ SI GRN WIRE GRN/ORG WIRE GRN/YEL WIRE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START HOT IN ON OR START ECU-IG FUSE HOT W/LIGHT SWITCH IN TAIL OR HEAD HTR FUSE HTR RELAY IDL TAC COOL HP TH+ TH- INSTRUMENT CLUSTER SYSTEM J/B 1 (BEHIND LEFT KICK PANEL) J/B 3 (BEHIND CENTER OF DASH) LT GRN WIRE LT GRN/RED WIRE MG CLT RELAY ORG/ WIRE PANEL FUSE PNK 22 23 24 25 WIRE PNK WIRE R/B 2 (ON LEFT SIDE OF ENGINE COMPARTMENT, BEHIND BATTERY) R/B 2 (ON LEFT SIDE OF ENGINE COMPARTMENT, BEHIND BATTERY) DOME FUSE RADIO TEMP CONTROL SWITCH RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE SC 300 SC 400 SOLENOID VALVE (COOLING FAN) (SC 400) (AT LEFT FRONT OF ENGINE) VIO WIRE VIO/WHT WIRE VSV (WATER VALVE) (ON RIGHT SIDE OF FIREWALL) WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE

BLK WIRE BLK/RED WIRE BLU RED/ WIRE BLU WIRE BLU/RED WIRE DEF FUSE DEFOGGER RELAY HEATER HOT AT ALL TIMES HOT IN ON OR START HTR FUSE JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) LEFT REMOTE CONTROL MIRROR MIR HTR FUSE NOISE FILTER (AT LEFT SIDE OF ENGINE COMPT, NEAR FUSE BLOCK) RDFGR REAR WINDOW DEFOGGER REAR WINDOW DEFOGGER SWITCH (A/C CONTROL ASSEMBLY) RED WIRE RED/ BLU WIRE RED/BLU WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) RIGHT REMOTE CONTROL MIRROR WHT/ BLK WIRE WHT/BLK WIRE YEL/RED WIRE

BLK WIRE COMBINATION METER COMBINATION SWITCH TURN SIGNAL SWITCH GRN WIRE GRN/BLK WIRE GRN/YEL WIRE HAZ-HORN FUSE HAZARD SWITCH HOT AT ALL TIMES HOT IN RUN I9 (3.0L) (DASH HARN, TOP CENTER OF DASH) JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) LEFT FRONT PARKING LIGHT LEFT FRONT SIDE MARKER LIGHT LEFT FRONT TURN LIGHT LEFT TURN SIGNAL IND LT GRN WIRE RED WIRE RED/BLK WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) RELAY BLOCK 4 (BEHIND LEFT KICK PANEL, ON FRONT SIDE OF JUNCTION BLOCK 1) RIGHT FRONT PARKING LIGHT RIGHT FRONT SIDE MARKER LIGHT RIGHT FRONT TURN LIGHT RIGHT LEFT RIGHT TURN SIGNAL IND TURN FUSE TURN SIGNAL FLASHER WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL WIRE

1 1 (W/ TCS) (W/O TCS) 3.0L 4.0L A/C DUAL PRESSURE SWITCH A/C SINGLE PRESSURE SWITCH ABS ACTUATOR ABS SOL RELAY BRAKE FLUID LEVEL SWITCH BRN WIRE COMBINATION METER DATA LINK CONNECTOR 2 CRUISE CONTROL SWITCH DATA LINK CONNECTOR 1 DATA LINK CONNECTOR 3 DAYTIME RUNNING LIGHT RELAY 3 DAYTIME RUNNING LIGHT RELAY 4 EFI MAIN RELAY ENGINE CONTROL MODULE ENGINE HOOD COURTESY SWITCH ENGINE OIL LEVEL WARNING SWITCH HEATED OXYGEN SENSOR BANK 1 SENSOR 1 HEATED OXYGEN SENSOR BANK 1 SENSOR 2 HEATED OXYGEN SENSOR BANK 2 SENSOR 1 HTR RELAY IGNITER LEFT FRONT FOG LIGHT LEFT FRONT PARKING LIGHT LEFT FRONT SIDE MARKER LIGHT LEFT FRONT TURN SIGNAL LIGHT LEFT LOW BEAM HEADLIGHT MOBILE PHONE NCA WIRE NOISE FILTER (DEFOGGER SYSTEM) NOISE FILTER (IGNITION SYSTEM) POWER STEERING OIL PRESSURE SWITCH RED/ WHT WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) RELAY BLOCK 6 (ON LEFT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) RIGHT FRONT FOG LIGHT RIGHT FRONT PARKING LIGHT RIGHT FRONT SIDE MARKER LIGHT RIGHT FRONT TURN SIGNAL LIGHT RIGHT LOW BEAM HEADLIGHT TELEPHONE TRANSCEIVER/ SPEAKER RELAY WASHER LEVEL SWITCH WHT RED/ WIRE WHT/ BLK WIRE WHT/BLK WIRE WHT/RED WIRE

1 2 3 4 5 6 IG 11 12 13 TAIL H-LP 3.0L 3.0L RIGHT LOW BEAM HEADLIGHT 4.0L AUTOMATIC LIGHT CONTROL SENSOR (LEFT SIDE OF DASH) BLK WIRE BLK/RED WIRE BLU/WHT WIRE BRN WIRE COMBINATION METER COMBINATION SWITCH CTY DAYTIME RUNNING LIGHT RELAY (MAIN) (ON J/B 1) DAYTIME RUNNING LIGHT RELAY 2 (BEHIND LEFT HEADLAMP) DAYTIME RUNNING LIGHT RELAY 3 (BEHIND LEFT HEADLAMP) DAYTIME RUNNING LIGHT RELAY 4 (BEHIND LEFT HEADLAMP) DIMMER SWITCH DRL FUSE ECU-IG FUSE ECU-B FUSE EXTERIOR LIGHTS SYSTEM (TAILLIGHT RELAY) FOG LIGHT RELAY FOGLIGHT SWITCH FUSE BLOCK (BEHIND BATTERY) GENERATOR GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/WHT WIRE GRN/YEL WIRE HEAD FUSE (LH-LWR) HEAD FUSE (RH-LWR) HEAD IND HEAD LH UPR FUSE HEAD RELAY HEAD RH UPR FUSE HF HI DIM HIGH BEAM IND HIGH FLASH LO TAIL HEAD AUTO OFF LIGHT CONTROL SWITCH HOT AT ALL TIMES HOT AT ALL TIMES HOT IN START OR RUN HOT AT ALL TIMES R/B 4 (BEHIND LEFT KICK PANEL, ON FRONT SIDE OF J/B 1) FOG FUSE J/B 1 (BEHIND LEFT KICK PANEL) J/B 1 (LEFT KICK PANEL) LEFT DOOR OPEN DETECTION SWITCH LEFT HIGH BEAM HEADLIGHT LEFT LOW BEAM HEADLIGHT LT GRN WIRE LT GRN/BLK WIRE MAIN FUSE PLOCK PKB LOCK CHG- PNK 1 2 3 4 5 6 7 8 9 WIRE PNK DOOR LOCKS SYSTEM WIRE PNK/BLK WIRE R/B 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) R/B 5 (BEHIND LEFT KICK PANEL, ON REAR SIDE OF J/B 1) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT DOOR OPEN DETECTION SWITCH RIGHT FOG LIGHT LEFT FOG LIGHT RIGHT HIGH BEAM HEAD- LIGHT WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/RED WIRE YEL/BLK WIRE YEL/GRN WIRE

BLU RED/ WIRE BLU WIRE BLU/ WHT WIRE COMBINATION METER COMBINATION SWITCH GAUGE FUSE GRN WIRE GRN/RED WIRE HIGH OFF HOT IN START OR ON INT TIME JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) WIPER FUSE JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) LOW/ MIST INT OFF PNK/BLU WIRE RED WIRE RED/ BLU WIRE SOLID STATE WASHER LEVEL IND WASHER LEVEL SWITCH (AT LEFT FRONT CORNER OF ENGINE COMPT) WASHER MOTOR (AT LEFT FRONT CORNER OF ENG COMPT) WASHER SWITCH WHT WIRE WHT/BLK WIRE WHT/RED WIRE WIPER MOTOR (LEFT SIDE OF FIRE- WALL) WIPER SWITCH YEL 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