Lexus GS II (1997-2000) driver side junction block (behind lower left end of dash) Wiring diagrams

3.0L, 4.0L AD BF BACK-UP DRIVER SIDE JUNCTION BLOCK (BEHIND LOWER LEFT END OF DASH) GAUGE FUSE HOT IN RUN OR START JUNCTION CONNECTOR J/C 1 (UNDER ECU BOX) JUNCTION CONNECTOR J/C 19 (TOP OF LEFT REAR WHEELWELL) JUNCTION CONNECTOR J/C 20 (UNDER LEFT C-PILLAR) JUNCTION CONNECTOR J/C 3, 4 (UNDER ECU BOX) LEFT REAR COMBINATION LIGHT (INNER) BACK- UP PARK/NEUTRAL POSITION SWITCH (ON TRANSMISSION) RED WIRE RED/BLK WIRE RED/BLU WIRE RIGHT REAR COMBINATION LIGHT (INNER) WHT/BLK WIRE

3.0L, 4.0L 6 7 8 9 10 11 12 TRLY DBKL BECU A/C CONTROL ASSEMBLY BLK/ WHT WIRE BLK/BLU WIRE BLK/RED WIRE BLU WIRE BLU/ORG WIRE BLU/RED WIRE BODY ECU 2 BRAKE FLUID LEVEL WARNING SWITCH (IN BRAKE FLUID RESERVOIR) BRN/BLK WIRE COMBINATION METER DRIVER SIDE JUNCTION BLOCK (BEHIND LOWER LEFT END OF DASH) ECU-IG FUSE ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) FFOG GSW FOG LIGHT SWITCH CENTER AIRBAG SENSOR FOG RELAY FFGO GRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/RED WIRE GSWO TAIL AUTO LF KSW MIRE MIRS MIRB HRLY ALTL ACAN HEAD LP RELAY MAIN DRL RELAY CLOCK HEADLIGHT SWITCH HEADLIGHT SWITCH LAMP FAILURE MODULE HOT IN RUN OR START IG CLTB CLTS BLVL ILE STPI HEAD INTERIOR LIGHTS STOP LIGHT SWITCH HEADLIGHT SWITCH JUNCTION CONNECTOR J/C 10 (UPPER LEFT END OF DASH) JUNCTION CONNECTOR J/C 15 (BEHIND COMBINATION METER) JUNCTION CONNECTOR J/C 6 (LEFT KICK PANEL) JUNCTION CONNECTOR J/C 9 (UPPER LEFT END OF DASH) LEFT FRONT STRUT TOWER) LIGHT CONTROL SENSOR LIGHT CONTROL SENSOR LIGHT CONTROL SENSOR LT GRN/BLK WIRE MPX MULTI-DISPLAY NOT USED GRD CLTE ORG/ WIRE PPL PPL/RED WIRE RED WIRE RED/BLK WIRE RED/GRN WIRE RED/YEL WIRE REMOTE CONTROL MIRROR SWITCH SHIFT LOCK CONTROL ECU SHIFT LOCK CONTROL ECU SLCK TAIL RELAY LEFT BUCKLE SWITCH TILT, TELESCOPIC ECU (BEHIND LEFT SIDE OF DASH) UNLOCK WARNING SWITCH (BEHIND LEFT SIDE OF DASH) WHT (OR BLU/RED) WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE YEL/RED WIRE

1 2 3 IG SH HR BSUB PWS 10 11 12 NOT USED GRD NOT USED 7 8 NOT USED BECU BLK/BLU WIRE BLK/RED WIRE BLU WIRE BLU/ORG WIRE BLU/YEL WIRE BODY ECU 1 BZR DATA LINK CONNECTOR 3 DRIVER DOOR ECU (IN DRIVER'S DOOR) DRIVER SIDE JUNCTION BLOCK (BEHIND LOWER LEFT END OF DASH) ENGINE HOOD COURTESY SWITCH LUGGAGE COMPARTMENT COURTESY SWITCH ENGINE ROOM RELAY BLOCK 1 (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) FRONT PASSENGER DOOR ECU (IN PASSENGER'S DOOR) GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE HCTY LGCY HORN RELAY LUGGAGE COMPARTMENT OPENER MOTOR HORN TR+ GSW RSSI RCO RDA HOT AT ALL TIMES HOT IN ACC OR RUN JUNCTION CONNECTOR J/C 13 (BEHIND COMBINATION METER) LEFT REAR DOOR ECU (IN LEFT REAR DOOR LT GRN WIRE LT GRN/BLK WIRE LT GRN/RED WIRE MIR RELAY DFG MOON ROOF CONTROL ECU MPX-B FUSE ORG/ WIRE P FR DOOR FUSE PARKING BRAKE SWITCH (BEHIND LEFT SIDE OF DASH) PASSENGER SIDE JUNCTION BLOCK (BEHIND LOWER RIGHT END OF DASH) PKB IND PWR SNOW HAZ PPL PNK WIRE PNK/BLK WIRE PNK/BLU WIRE POWER SEAT ECU (UNDER DRIVER'S SEAT) PPL PPL/GRN WIRE PPL/YEL WIRE RADIO 2 FUSE RED/WHT WIRE RED/YEL WIRE RIGHT REAR DOOR ECU (IN RIGHT REAR DOOR) TKUL TSW PBKL W/ MEMORY SEAT W/O MEMORY SEAT WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WIRELESS DOOR LOCK BUZZER WIRELESS DOOR LOCK BUZZER WIRELESS DOOR LOCK ECU WIRELESS DOOR LOCK ECU WIRELESS DOOR LOCK ECU YEL/BLK WIRE

AUTO AUTOMATIC LIGHT CONTROL SENSOR (BEHIND UPPER LEFT SIDE OF DASH) BECU TRLY GRD CLTS CLTE CLTB BLK/ WHT WIRE BLK/RED WIRE BLU/BLK WIRE BLU/ORG WIRE BODY ECU 2 COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM GSWO AUTO HEAD TAIL CPUB CTYE BDR SIG CTY D FR DOOR FUSE DRIVER DOOR ECU (IN DRIVER'S DOOR) DRIVER SIDE JUNCTION BLOCK (BEHIND LOWER LEFT END OF DASH) ECU-IG FUSE ENGINE ROOM RELAY BLOCK 1 (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRY/RED WIRE HEADLIGHT SWITCH HOT AT ALL TIMES HOT IN RUN OR START HRLY HEADLIGHTS SYSTEM JUNCTION CONNECTOR J/C 10 (UPPER LEFT END OF DASH) JUNCTION CONNECTOR J/C 14 (BEHIND COMBINATION METER) JUNCTION CONNECTOR J/C 19 (TOP OF LEFT REAR WHEEL- WELL) JUNCTION CONNECTOR J/C 6 (LEFT KICK PANEL) JUNCTION CONNECTOR J/C 7 (LEFT KICK PANEL) LEFT FRONT DOOR COURTESY SWITCH LEFT FRONT SIDE MARKER LIGHT LEFT LICENSE PLATE LIGHT LEFT PARKING LIGHT MPX-B FUSE ORG/ WIRE PASSENGER SIDE JUNCTION BLOCK (BEHIND LOWER RIGHT END OF DASH) PPL/RED WIRE RED WIRE RED/BLK WIRE RED/GRN WIRE RED/YEL WIRE RIGHT FRONT SIDE MARKER LIGHT RIGHT LICENSE PLATE LIGHT RIGHT PARKING LIGHT STOP FUSE STOPLIGHT SWITCH (BRAKE PEDAL BRACKET) TAIL TAIL HEAD AUTO OFF OFF WHT WIRE WHT/ BLK WIRE WHT/BLK WIRE

1 2 3 4 5 6 7 8 9 10 11 12 BRAKE LTS HI MOUNT ALT FUSE BODY COMPUTER SYSTEM BRN WIRE COMBINATION METER DRIVER SIDE JUNCTION BLOCK (BEHIND LOWER LEFT END OF DASH) ENGINE ROOM RELAY BLOCK (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HAZARD SWITCH HIGH MOUNTED STOP LIGHT (W/ REAR SPOILER) HIGH MOUNTED STOP LIGHT (W/O REAR SPOILER) HOT AT ALL TIMES HOT IN RUN OR START JUNCTION CONNECTOR J/C 12 (BEHIND COMBINATION METER) JUNCTION CONNECTOR J/C 17 (UPPER RIGHT END OF DASH) JUNCTION CONNECTOR J/C 20 (LEFT QUARTER PANEL) LEFT LEFT FRONT STRUT TOWER) LEFT FRONT TURN SIGNAL LIGHT LEFT REAR COMBINATION LIGHT (OUTER) LEFT TURN INDIC LEFT, RIGHT REAR COMBINATION LIGHTS (INNER) LF SIGNAL TAILLT PWR HI MOUNT TAIL LTS POWER STOP SW STOP SW GRD SIDE MARKER LIGHT FAILURE SENSOR (AT LEFT SIDE OF LUGGAGE COMPARTMENT) MARKR MARKR TAIL STOP NOISE FILTER (HIGH MOUNTED STOP LIGHT) (AT LEFT FRONT CORNER OF LUGGAGE COMPT) PPL/RED WIRE RED/BLU WIRE RED/WHT WIRE RIGHT RIGHT FRONT TURN SIGNAL LIGHT RIGHT REAR COMBINATION LIGHT (OUTER) RIGHT TURN INDIC STP TL TAIL FUSE TAIL RELAY TURN TURN SIGNAL FLASHER (BEHIND LEFT SIDE OF DASH) TURN SIGNAL LIGHT SWITCH TURN STOP TAIL TURN, HAZ FUSE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE

A/C CONTROL ASSEMBLY HAZARD SWITCH ABS, TRAC, VSC ECU BLK WIRE BLK/ WHT WIRE BLOWER MOTOR CONTROLLER BODY ECU 1 BODY ECU 2 BRAKE FLUID LEVEL WARNING SWITCH CANADA CD AUTOMATIC CHANGER CENTER AIRBAG SENSOR ASSEMBLY CIGARETTE LIGHTER POWER OUTLET CLOCK COMBINATION METER D/A CONVERTER DASH HARN, BEHIND COMBINATION METER) DRIVER SIDE JUNCTION BLOCK (BEHIND LOWER LEFT END OF DASH) ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SWITCH FAN 2 RELAY FAN 3 RELAY FROM FROM JUNCTION CONNECTOR J/C 10 (DIAGRAM 2 OF 4) FRONT PASSENGER DOOR ECU FRONT WIPER MOTOR GARAGE DOOR OPENER GLOVE BOX LIGHT SWITCH HTR RELAY IG RELAY INNER MIRROR INSTRUMENT PANEL JUNCTION BLOCK (BEHIND UPPER CENTER OF DASH) JUNCTION CONNECTOR J/C 17 (UPPER RIGHT END OF DASH) LEFT REAR INTERIOR LIGHT LEFT VANITY LIGHT MOON ROOF CONTROL ECU MOON ROOF CONTROL SWITCH NOISE FILTER PASSENGER SIDE JUNCTION BLOCK (BEHIND LOWER RIGHT END OF DASH) PASSENGER SIDE RELAY BLOCK (BEHIND LOWER RIGHT END OF DASH) PERSONAL LIGHT POWER STEERING OIL PRESSURE SWITCH RADIO AND PLAYER RIGHT MIRROR HEATER RIGHT REAR INTERIOR LIGHT RIGHT VANITY LIGHT SHIFT LOCK CONTROL ECU STEREO COMPONENT AMPLIFIER MULTI- DISPLAY VSC OFF SWITCH W/ MEMORY W/O MEMORY WHT WIRE WHT/ BLK WIRE WHT/BLK WIRE

5 1 FFGO IG BECU TRLY GRD CLTS CLTE CLTB BLK/ WHT WIRE BLK/RED WIRE BLU RED/ WIRE BLU/BLK WIRE BLU/ORG WIRE BODY ECU 2 COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM GSWO FFOG AUTO HEAD TAIL CTY D FR DOOR FUSE DIMMER SWITCH DRIVER DOOR ECU (IN DRIVER'S DOOR) DRIVER SIDE JUNCTION BLOCK (BEHIND LOWER LEFT END OF DASH) ECU-IG FUSE ENGINE ROOM RELAY BLOCK 1 (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) FOG LIGHTS FOG RELAY FOGLIGHT SWITCH FR FOG FUSE GAUGE FUSE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRY/RED WIRE HEADLIGHT SWITCH HIGH LOW HOT AT ALL TIMES HOT IN START OR RUN HRLY ALTL JUNCTION CONNECTOR J/C 17 (UPPER RIGHT END OF DASH) JUNCTION CONNECTOR J/C 6 (LEFT KICK PANEL) LEFT FRONT DOOR COURTESY SWITCH LEFT FRONT FOG LIGHT LEFT FRONT STRUT TOWER) MPX-B FUSE ORG/ WIRE PASSENGER SIDE JUNCTION BLOCK (BEHIND LOWER RIGHT END OF DASH) RED WIRE RED/ BLU WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/YEL WIRE RIGHT FRONT FOG LIGHT SIG BDR CPUB CTYE TAIL HEAD AUTO OFF TAIL OFF AUTO WHT GRN/ WIRE WHT/BLK WIRE WHT/BLU WIRE YEL/RED WIRE

5 1 FFGO IG AUTOMATIC LIGHT CONTROL SENSOR (BEHIND UPPER LEFT SIDE OF DASH) BECU TRLY GRD CLTS CLTE CLTB BLK/ WHT WIRE BLK/RED WIRE BLU/BLK WIRE BLU/ORG WIRE BODY ECU 2 COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM GSWO FFOG AUTO HEAD TAIL CTY D FR DOOR FUSE DIMMER SWITCH DRIVER DOOR ECU (IN DRIVER'S DOOR) DRIVER SIDE JUNCTION BLOCK (BEHIND LOWER LEFT END OF DASH) ECU-IG FUSE ENGINE ROOM RELAY BLOCK 1 (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) FLASH TAIL FOG LIGHTS FOG RELAY FOGLIGHT SWITCH FR FOG FUSE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRY/RED WIRE HEADLIGHT SWITCH HIGH AUTO LOW HOT AT ALL TIMES HOT IN RUN OR START JUNCTION CONNECTOR J/C 10 (UPPER LEFT END OF DASH) JUNCTION CONNECTOR J/C 6 (LEFT KICK PANEL) LEFT FRONT DOOR COURTESY SWITCH LEFT FRONT FOG LIGHT LEFT FRONT STRUT TOWER) MPX-B FUSE ORG/ WIRE PASSENGER SIDE JUNCTION BLOCK (BEHIND LOWER RIGHT END OF DASH) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/YEL WIRE RIGHT FRONT FOG LIGHT SIG BDR CPUB CTYE TAIL HEAD AUTO OFF OFF WHT GRN/ WIRE WHT WIRE WHT/BLK WIRE WHT/RED WIRE

3.0L 4.0L (UPPER RIGHT SIDE OF DASH) A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) ALT FUSE BLK WIRE BLK/ WHT WIRE BLU WIRE BLU/RED WIRE BODY ECU 1 DRIVER SIDE JUNCTION BLOCK (BEHIND LOWER LEFT END OF DASH) ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPARTMENT, IN ECU BOX) ENGINE ROOM RELAY BLOCK 1 (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) HEATER FUSE HOT AT ALL TIMES HOT IN ON OR START J/C 10 (UPPER LEFT END OF DASH) J/C 13 (BEHIND LEFT SIDE OF DASH) J/C 17 (UPPER RIGHT END OF DASH) LEFT REMOTE CONTROL MIRROR HEATER MIR HTR FUSE MIR HTR RELAY MULTI DISPLAY (CENTER OF DASH) RED/ BLU WIRE RED/ WHT WIRE RED/BLU WIRE RIGHT REMOTE CONTROL MIRROR HEATER W/ DRIVING POSITION MEMORY W/O DRIVING POSITION MEMORY WHT RED/ WIRE WHT WIRE WHT/ BLK WIRE WHT/BLK WIRE

3.0L, 4.0L A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BODY ECU 1 DEF RELAY (IN PASSENGER SIDE RELAY BLOCK) DEFOG FUSE DRIVER SIDE JUNCTION BLOCK (BEHIND LOWER LEFT END OF DASH) ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPARTMENT, IN ECU BOX) HEATER FUSE HOT AT ALL TIMES HOT IN ON OR START J/C 13 (BEHIND LEFT SIDE OF DASH) MULTI DISPLAY (CENTER OF DASH) NOISE FILTER PASSENGER SIDE JUNCTION BLOCK (BEHIND LOWER RIGHT END OF DASH) REAR WINDOW DEFOGGER RED WIRE RED/BLU WIRE WHT WIRE WHT/BLK WIRE