Lexus SC I (1991-2001) junction block 1 (behind left kick panel) 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

BLK WIRE BLU WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE COMBINATION METER GRN/WHT WIRE HAZ-HORN FUSE HORN RELAY HOT AT ALL TIMES JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) LEFT LOCK/ UNLOCK MOTOR, DOOR DETECTION POSITION SWITCH LT GRN WIRE LUGGAGE COMPARMENT DOOR OPENER MOTOR (CENTER REAR OF TRUNK) LUGGAGE COMPARTMENT DOOR OPEN SWITCH LUGGAGE COMPARTMENT KEY UNLOCK SWITCH (RIGHT REAR OF TRUNK) PNK WIRE RED WIRE RED/WHT WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) RIGHT LOCK/ UNLOCK MOTOR, DOOR DETECTION POSITION SWITCH THEFT DETERRENT HORN (LEFT REAR OF ENG COMPT) TRIP SWITCH, THEFT DETERRENT INDICATOR SWITCH UNLOCK WARNING SWITCH (IGNITION SWITCH) VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

BACK UP LAMP BACK-UP LIGHT SWITCH (PART OF PARK/ NEUTRAL SWITCH) BLK WIRE BLU WIRE GAUGE FUSE HOT IN ON OR START JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) LEFT REAR COMBINATION LIGHT RIGHT REAR COMBINATION LIGHT WHT WIRE YEL 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

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

AUTO AUTOMATIC LIGHT CONTROL SENSOR BLK WIRE BLU WIRE BRN WIRE COMBINATION METER COMBINATION SWITCH DIODE FUSE BLOCK (AT LEFT SIDE OF ENGINE COMPARTMENT, BEHIND BATTERY) FUSIBLE LINK GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HEAD HOT AT ALL TIMES HOT IN ON OR START INTEGRATION RELAY (LEFT SIDE OF DASH) JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) LEFT REAR COMBINATION LIGHT LICENSE PLATE LIGHT LIGHT LIGHT FAILURE SENSOR (LEFT REAR SIDE OF LUGGAGE COMPARTMENT) OFF TAIL REAR LIGHT WARNING LIGHT RED WIRE RED/WHT WIRE RIGHT REAR COMBINATION LIGHT STOP FUSE STOP LIGHT STOPLIGHT SWITCH (NEAR BRAKE PEDAL) TAIL FUSE TAIL LIGHTS TAILLIGHT RELAY TURN SIGNAL VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/GRN 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

A/C CONTROL ASSEMBLY AIR BAG SENSOR ASSEMBLY BLK WIRE BLK/YEL WIRE COMBINATION METER (4.0L) COOLING FAN ECU (4.0L) DIMMER SWITCH (COMBINATION SWITCH) INNER MIRROR INTEGRATION RELAY JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) LEFT DOOR KEY LOCK/ UNLOCK SWITCH LEFT DOOR LOCK/ UNLOCK MOTOR, DOOR DETECTION POSITION SWITCH LEFT POWER WINDOW MASTER SWITCH, DOOR LOCK CONTROL SWITCH LEFT REMOTE CONTROL MIRROR LEFT VANITY LIGHT LIGHT CONTROL SWITCH COMBINATION SWITCH MOON ROOF CONTROL RELAY MOON ROOF CONTROL SWITCH MOON ROOF LIMIT SWITCH MOON- ROOF MOTOR PERSONAL LIGHT POWER MAIN RELAY PPS ECU RED WIRE REMOTE CONTROL MIRROR ECU REMOTE CONTROL MIRROR SWITCH RIGHT VANITY LIGHT RIGHT VANITY LIGHT INNER MIRROR THEFT DETERRENT, DOOR LOCK ECU TILT, POWER TELESCOPIC ECU TO JUNCTION TRANSPONDER KEY AMPLIFIER TURN SIGNAL FLASHER W/ MEMORY W/O MEMORY W/O MOON W/ MOON ROOF ROOF WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/RED WIRE WIPER MOTOR IGNITION MAIN RELAY WIPER WASHER SWITCH (COMBINATION SWITCH)

A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) TC A/C CONTROL, RADIO SWITCH LAMP A/T SHIFT LEVER ILLUMINATION LAMP BLK WIRE BLU WIRE BRN WIRE CIGARETTE LIGHTER LAMP COMBINATION METER TAIL ELECTRONIC CONTROLLED TRANSMISSION PATTERN SELECT, SEAT HEATER SWITCH FUSE BLOCK (AT LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) FUSIBLE LINK GLOVE BOX LAMP) GLOVE BOX LIGHT SWITCH GRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/YEL WIRE HAZARD SWITCH LAMP HEAD OFF TAIL HOT AT ALL TIMES INTEGRATION RELAY (ON JUNCTION BLOCK 1) JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) LIGHT CONTROL SWITCH (PART OF COMBINATION SWITCH) LT GRN WIRE LT GRN/RED WIRE ORG/ WIRE PANEL FUSE RADIO, PLAYER LAMP RE RL RV RED WIRE RHEOSTAT SOLID STATE TAILLIGHT RELAY TRIP SWITCH, THEFT DETERRENT WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 MHR MVR M+R +B HSRR VSRR 1 2 3 4 5 6 SWE SWRV SWB SWRH SWLH SWLV BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE DOWN DRIVER'S POWER SEAT ECU (UNDER DRIVER'S SEAT) DRIVER'S POWER SEAT ECU SHIELD DRIVING POSITION MEMORY, RETURN SWITCH (LEFT SIDE OF DASH) DSW ECUE GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES RAD 2 FUSE ECU-B FUSE HOT IN ACC OR ON JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) LEFT DOOR OPEN DETECTION SWITCH LEFT REMOTE CONTROL MIRROR LEFT RIGHT LEFT/ RIGHT UP/ DOWN LH SELECT SWITCH RH MHL MVL M+L GND MRY NCA WIRE OPERATION SWITCH PNK WIRE RED/BLK WIRE RED/WHT WIRE REMOTE CONTROL MIRROR ECU (BEHIND LEFT CENTER OF DASH) REMOTE CONTROL MIRROR SWITCH RIGHT LEFT RIGHT REMOTE CONTROL MIRROR SET- TILT, POWER TELESCOPIC ECU (BEHIND LEFT SIDE OF DASH) UP DOWN VC HSRL VSRL SI VIO WIRE WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE