Lexus SC I (1991-2001) j/b 1 (behind left kick panel) Wiring diagrams

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 RL- RR+ 20 22 21 14 20 15 TRC- NEO EFI- EFI+ ABS ABS, TRACTION ECU (ABOVE BASE OF RIGHT B-PILLAR) BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BRAIDED BRAIDED BRAIDED BRAKE FLUID LEVEL SWITCH (IN BRAKE FLUID RESERVOIR) BRN WIRE COMBINATION METER ECU-IG FUSE ENGINE CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) GAUGE FUSE GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT IN RUN J/B 1 (BEHIND LEFT KICK PANEL) J/B 3 (BEHIND CENTER OF DASH) JUNCTION CONNECTOR J/C 2 (CENTER OF REAR SHELF) LBL+ EFI+ CSW LBL- EFI- LT GRN WIRE LT GRN/RED WIRE NEO STP PARKING BRAKE SWITCH (AT BASE OF PARKING BRAKE LEVER) PNK/BLU WIRE RED WIRE RED/WHT WIRE RL RR STOP FUSE STOPLIGHT SWITCH (ON BRAKE PEDAL SUPPORT) STP, BK TRAC TRAC OFF TRACTION CUT SWITCH TRC+ VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/RED WIRE

+B MH MC MFRS MREC IG+ TR MFACE MDEF A/C CONTROL ASSEMBLY A/C SOLAR SENSOR (AT UPPER RIGHT SIDE OF DASH) AIR INLET CONTROL SERVO MOTOR (BEHIND RIGHT SIDE OF DASH) AIR MIX CONTROL SERVO MOTOR (BEHIND RIGHT SIDE OF DASH) AIR VENT MODE CONTROL SERVO MOTOR (BEHIND CENTER OF DASH) AMOUT REOST WV MGC TC TAIL BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BLW HR RDFGR CFAN BRN WIRE BRN/WHT WIRE DEF FACE DEFOGGER SYSTEM FR RECIRC GRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE HOT COOL IGN A/C IN IGNITER (ON LEFT SIDE OF LEFT STRUT TOWER) INSTRUMENT CLUSTER SYSTEM INTERIOR LIGHTS SYSTEM (RHEOSTAT) J/B 1 (BEHIND LEFT KICK PANEL) J/B 3 (BEHIND CENTER OF DASH) LOCK IN SAUT LP LT GRN WIRE LT GRN/RED WIRE LT SC 300 ONLY ORG/ WIRE PNK 22 23 24 25 WIRE RED WIRE RED/BLU WIRE RED/YEL WIRE SC 400 ONLY SG TEL IN TP TPI SPD TPM TACH TEL TR TAM TE TW TS PNK WIRE VER 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 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

ABS ECU (BEHIND RIGHT SIDE OF DASH) ABS, TRACTION ECU (ABOVE BASE OF RIGHT B-PILLAR) BLK WIRE BLK/RED WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE COMBINATION METER (UNDER LEFT SIDE OF ASHTRAY) ECU-IG FUSE GAUGE FUSE HOT IN ON OR START IG SPD J/B 1 (BEHIND LEFT KICK PANEL) J/B 3 (BEHIND CENTER OF DASH) LT GRN WIRE ORG/ WIRE PPS ECU (BEHIND RIGHT SIDE OF DASH) PPS SOLENOID (AT LEFT FRONT OF ENGINE) RED WIRE SOL- SOL+ W/ TRACTION CONTROL W/O TRACTION CONTROL WHT WIRE WHT/BLK WIRE YEL WIRE YEL/GRN 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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 TXM+ SGND 1 2 3 4 5 6 7 8 9 10 11 12 CDR+ CDL+ A/C, RADIO CONTROL SWITCH AMP AMP RR RL BEEP GND SGND B+ TXM- MUTE BLK WIRE BLK/WHT WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/WHT WIRE CD PLAYER CDR- CDL- CDR- CDR+ CDL- CDL+ D/A CONVERTER DOME FUSE FR FL MUTE FR+ FL+ RR+ RR- FR- FL- GRN WIRE GRN/ORG WIRE GRN/WHT WIRE GROUND GRY WIRE HOT AT ALL TIMES HOT IN ACC OR ON ILLUM ANTB ILLUM TLMT ANTA J/B 1 (BEHIND LEFT KICK PANEL) LEFT REAR SPEAKER LT GRN WIRE LT GRN/RED WIRE MUTE MUTE FL FR ANT NCA WIRE PNK WIRE PNK/BLK WIRE PNK/BLU WIRE POWER ANTENNA SYSTEM R/B 2 (ON LEFT SIDE OF ENGINE COMPARTMENT, BEHIND BATTERY) RADIO FUSE 1 RADIO FUSE 2 RADIO/CD PLAYER RED WIRE RED/BLK WIRE RED/WHT WIRE RIGHT FRONT DOOR SPEAKER RIGHT REAR SPEAKER LEFT FRONT DOOR SPEAKER RL+ RL- B+ SGND GND BEEP RL RR SPEAKER RELAY STEREO POWER AMPLIFIER (RIGHT SIDE OF LUGGAGE COMPARTMENT) TELEPHONE TRANSCEIVER TELEPHONE TRANSCEIVER, SPEAKER RELAY (LEFT REAR CORNER OF LUGGAGE COMPARTMENT) TXM- TXM+ VIO WIRE VOL (-) VOLC PWR WF+ WF- WHT WIRE WHT/GRN WIRE WOOFER SPEAKER YEL WIRE YEL/RED WIRE

+B FR- FL- 1 2 3 4 5 6 7 8 9 10 11 12 CDR+ CDL+ A/C, RADIO CONTROL SWITCH ANTB ANTA ANT BLK WIRE BLK/WHT WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BUS (-) BUS (+) CD AUTOMATIC CHANGER (RIGHT SIDE OF LUGGAGE COMPARTMENT) CDL+ GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/WHT WIRE GRY WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN ACC OR ON J/B 1 (BEHIND LEFT KICK PANEL) LEFT REAR SPEAKER LT GRN WIRE LT GRN/RED WIRE MUTE +B CDR- CDL- GND TXM- TXM+ MUTE BUS+ BUS- NCA WIRE PK/BK PNK WIRE POWER ANTENNA SYSTEM R - L - R+ L+ SGND MUTE R/B 2 (ON LEFT SIDE OF ENGINE COMPARTMENT, BEHIND BATTERY) RADIO FUSE 1 RADIO FUSE 2 RADIO/CD PLAYER RED WIRE RED/WHT WIRE RIGHT FRONT DOOR SPEAKER RIGHT REAR SPEAKER RR+ RL+ RR- WF+ WF- RL- SPEAKER RELAY STEREO POWER AMPLIFIER (RIGHT SIDE OF LUGGAGE COMPARTMENT) TELEPHONE TRANSCEIVER TELEPHONE TRANSCEIVER, SPEAKER RELAY (LEFT REAR CORNER OF LUGGAGE COMPARTMENT) TLMT TXM+ CDR+ CDL+ TXM- CDR- MUTE VIO WIRE VOL (-) VOLC PWR WHT WIRE WHT/GRN WIRE WOOFER SPEAKER LEFT FRONT DOOR SPEAKER YEL WIRE YEL/RED WIRE

AIR BAG SENSOR ASSEMBLY (BEHIND CENTER OF DASH, FORWARD OF CENTER CONSOLE) AIR BAG SQUIB (FRONT PASSENGER AIR BAG ASSEMBLY) AIR BAG SQUIB (STEERING WHEEL PAD) BLK/ORG WIRE BLK/YEL WIRE BLU WIRE CIG FUSE COMBINATION METER DATA LINK CONNECTOR (DLC) 2 (PARTIAL) (BEHIND LEFT SIDE OF DASH) 4 12 ECU-B FUSE GRY WIRE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START IGN FUSE J/B 1 (BEHIND LEFT KICK PANEL) J/B 3 (BEHIND CENTER OF DASH) LA D- D+ TC P+ P- PNK/BLK WIRE PNK/BLU WIRE RED WIRE SRS WARNING LIGHT WHT RED/ WIRE WHT WIRE WHT/BLK WIRE YEL BLK/ WIRE YEL WIRE

BLK WIRE BLK/RED WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE CIG FUSE DOOR FUSE ECU-IG FUSE FUEL LID OPENER SOLENOID (AT RIGHT SIDE OF LUGGAGE COMPARTMENT) FUEL LID OPENER SWITCH HOT AT ALL TIMES HOT IN ACCY OR RUN J/B 1 (BEHIND LEFT KICK PANEL) J/B 3 (BEHIND CENTER OF DASH) LUGGAGE COMPARTMENT DOOR OPENER MOTOR (CENTER REAR OF TRUNK) LUGGAGE COMPARTMENT DOOR OPENER SWITCH THEFT DETERRENT, DOOR LOCK CONTROL ECU (BEHIND INSTRUMENT CLUSTER) TSW WHT/BLK WIRE WHT/RED WIRE