Lexus SC I (1991-2001) blu/yel Wiring diagrams

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

BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BLU/YEL WIRE DOOR FUSIBLE LINK DOWN DRIVER'S POWER SEAT CONTROL SWITCH DRIVER'S SEAT FRONT VERTICAL MOTOR (UNDER SEAT) DRIVER'S SEAT LUMBAR MOTOR (IN SEATBACK) DRIVER'S SEAT REAR VERTICAL MOTOR (UNDER SEAT) DRIVER'S SEAT RECLINING MOTOR (UNDER SEAT) DRIVER'S SEAT SLIDE MOTOR (UNDER SEAT) FRONT GRN WIRE GRN/RED WIRE HOLD HOT AT ALL TIMES JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) LUMBAR SUPPORT REAR RECLINING RELEASE SLIDE VERTICAL FRONT VERTICAL REAR WHT/BLK WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 SO DSW 1 2 3 4 5 6 7 8 9 10 11 12 IG TEM+ TIM- +B ASW AUTO SW BLK WIRE BLK/RED WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE DASH HARN, BEHIND COMBINATION METER) DOME FUSE DRIVER'S POWER SEAT ECU (UNDER DRIVER'S SEAT) DRIVER'S POWER SEAT ECU SHIELD DRIVING POSITION MEMORY, RETURN SWITCH (LEFT SIDE OF DASH) ECU-IG FUSE GAUGE FUSE GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT IN START OR RUN JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) LEFT DOOR LOCK/ UNLOCK MOTOR, DOOR DETECTION POSITION SWITCH MANUAL SW MSW VC ECU-B NCA WIRE P (PKB) GND PARK/NEUTRAL POSITION SWITCH (ON TRANSMISSION) PNK WIRE PNK/BLK WIRE PNK/BLU WIRE POWER FUSE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) REMOTE CONTROL MIRROR ECU (BEHIND LEFT CENTER OF DASH) SET- SI SO SSR- TELESCO LONG TELESCO SHORT TELESCOPIC CONTROL MOTOR TELESCOPIC POSITION SENSOR TELESCOPIC POSITION SENSOR (BEHIND LEFT SIDE OF DASH) TES TIS ECUE SO UWSW MRY TILT CONTROL MOTOR TILT DOWN TILT POSITION SENSOR TILT UP TILT, POWER TELESCOPIC ECU (BEHIND LEFT SIDE OF DASH) TILT, POWER TELESCOPIC UNIT (COMBINATION SWITCH) TIM+ TEM- UNLOCK WARNING SWITCH (IGNITION SWITCH) VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/GRN WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 GND SLD+ RCL+ FRV+ +B STOP IG 1 2 3 8 9 11 12 SI DSW BLK WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU RED/ WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE DOOR FUSE DOWN DRIVER'S FRONT VERTICAL MOTOR (UNDER SEAT) DRIVER'S POWER SEAT CONTROL SWITCH DRIVER'S REAR VERTICAL MOTOR (UNDER SEAT) DRIVER'S SLIDE CONTROL MOTOR (UNDER SEAT) DRIVING POSITION MEMORY, RETURN SWITCH ECU-IG FUSE ECUE SO MRY FRONT FRONT VERTICAL GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES HOT IN START OR ON JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) LEFT DOOR OPEN DETECTION SWITCH LT GRN WIRE LT GRN/RED WIRE LUMBAR SUPPORT LUMBAR SUPPORT MOTOR (UNDER LEFT SEAT) NCA WIRE PNK WIRE POWER SEAT ECU (UNDER DRIVER'S SEAT) REAR RECLINING RED WIRE RED/BLK WIRE SET- SHIELD SLD- RCL- FRV- RRV- RRV+ SLIDE SSRR SSRV SSRS SO SSR- STOP FUSE STOPLIGHT SWITCH (ON BRACKET, ABOVE BRAKE PEDAL) TILT, POWER TELESCOPIC ECU (BEHIND LEFT SIDE OF DASH) VERTICAL REAR VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE YEL GRN/ WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 SYSB SLSW PVCC BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE DOME FUSE DOWN DRIVER'S POWER SEAT RECLINING MOTOR CONTROL (UNDER DRIVER'S SEAT) FRONT FRONT VERTICAL MOTOR (UNDER RIGHT SEAT) FRONT VERTICAL POSITION SENSOR (UNDER DRIVER'S SEAT) FRONT VERTICLE GAUGE FUSE GRN WIRE GRN/RED WIRE GRN/YEL WIRE HOLD HOT AT ALL TIMES HOT IN ON OR START JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) LT GRN WIRE LT GRN/RED WIRE LUMBAR SUPPORT LUMBAR SUPPORT MOTOR (UNDER RIGHT SEAT) PARK/ NEUTRAL POSITION SWITCH PASSENGER'S RECLINING LIMIT SWITCH (UNDER SEAT) PASSENGER'S SEAT ECU (UNDER PASSENGER'S SEAT) PASSENGER'S SEAT SLIDE LIMIT SWITCH (UNDER SEAT) PASSENGER'S SEAT SLIDE MOTOR (UNDER RIGHT SEAT) PASSENGER'S SEAT SLIDE POSITION SENSOR (UNDER SEAT) PASSENGER'S SEATBELT BUCKLE SWITCH (IN BUCKLE) PASSENGER'S TENSION REDUCER SOLENOID PASSENGERS POWER SEAT CONTROL SWITCH REAR REAR VERTICAL MOTOR (UNDER RIGHT SEAT) REAR VERTICAL POSITION SENSOR (UNDER DRIVER'S SEAT) REAR VERTICLE RECLINING RECLINING MOTOR (UNDER RIGHT SEAT) RED WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMP, BEHIND BATTERY) RELEASE SGND GND SLD- SLDR SLDF SLD+ +B PD RFSW SSRS PBCL RRSW SLIDE SLIDE POSITION SENSOR (UNDER DRIVER'S SEAT) VIO WIRE VIO/WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

1 2 3 7 8 10 SVCC SIG SGND SOLID STATE 11 6 4 14 2 5 6 7 8 ANT+B IG GND 12 13 3 1 2 3 ANTB ANTA +B AUTO ANTENNA CONTROL RELAY AUTO ANTENNA MOTOR AUTO ANTENNA MOTOR, RELAY (AT LEFT SIDE OF LUGGAGE COMPARTMENT) BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE DOWN ECU-IG FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN START OR ON JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) PIONEER PNK/BLK WIRE RADIO 1 FUSE RADIO 2 FUSE RADIO, PLAYER RED WIRE RED/GRN WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) SENSOR WHT/BLK WIRE YEL WIRE YEL/RED WIRE

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/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE CLOSE OPEN DOME FUSE DOOR FUSE DOOR OPEN DETECTION SWITCH LH DOOR OPEN DETECTION SWITCH RH ECU-IG FUSE HOT AT ALL TIMES HOT IN ON OR START JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) LT GRN WIRE MOON ROOF CONTROL RELAY (IN FRONT OF MOON ROOF OPENING) MOON ROOF CONTROL SWITCH MOON ROOF MOTOR, LIMIT SWITCH (IN FRONT OF MOON ROOF OPENING) MTR + MTR - NO. 1 NO. 2 PNK WIRE PNK/BLU WIRE POWER FUSE POWER MAIN RELAY RED WIRE RED/BLK WIRE RED/WHT WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) THEFT DETERRENT, DOOR LOCK CONTROL ECU (BEHIND INSTRUMENT CLUSTER) UP DOWN VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/YEL WIRE YEL WIRE YEL/RED 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