Lexus SC I (1991-2001) 4.0l Wiring diagrams

3.0L 3.0L, 4.0L 4.0L ALT FUSIBLE LINK ALT SENSING FUSE BATTERY BLK WIRE BLK/ORG WIRE BLK/YEL WIRE CHARGING WARNING LIGHT COMBINATION METER ENGINE FUSE FUSE BLOCK (AT LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) GENERATOR GRN/WHT WIRE HOT IN RUN OR START IGN FUSE JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) MAIN FUSIBLE LINK NCA WIRE RELAY BLOCK 2 (ON LEFT OF ENGINE COMPT, BEHIND BATTERY) STARTING CIRCUIT WHT BLK/YEL WIRE WHT WIRE YEL/GRN WIRE

3.0L 3.0L, 4.0L 4.0L ALT FUSIBLE LINK ALT SENSING FUSE BATTERY BLK WIRE BLK/ORG WIRE BLK/YEL WIRE CHARGING WARNING LIGHT COMBINATION METER ENGINE FUSE FUSE BLOCK (AT LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) GENERATOR GRN/WHT WIRE HOT IN RUN OR START IGN FUSE JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) MAIN FUSIBLE LINK NCA WIRE RELAY BLOCK 2 (ON LEFT OF ENGINE COMPT, BEHIND BATTERY) STARTING CIRCUIT WHT BLK/YEL WIRE WHT WIRE YEL/GRN 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

4.0L BRN WIRE COMBINATION METER CRUISE CONTROL SWITCH D/A CONVERTER DATA LINK CONNECTOR 2 DATA LINK CONNECTOR 3 DRIVER'S POWER SEAT CONTROL SWITCH DRIVER'S POWER SEAT ECU DRIVER'S SEAT HEATER ENGINE CONTROL MODULE ENGINE OIL LEVEL WARNING SWITCH DATA LINK CONNECTOR 1 FUEL PUMP FUEL PUMP ECU HEATED OXYGEN SENSOR BANK 1 SENSOR 1 HEATED OXYGEN SENSOR BANK 1 SENSOR 2 HEATED OXYGEN SENSOR BANK 2 SENSOR 1 HEATED OXYGEN SENSOR BANK 2 SENSOR 2 IGNTION COIL, IGNITER 1 IGNTION COIL, IGNITER 2 IGNTION COIL, IGNITER 3 IGNTION COIL, IGNITER 4 IGNTION COIL, IGNITER 5 IGNTION COIL, IGNITER 6 IGNTION COIL, IGNITER 7 IGNTION COIL, IGNITER 8 LEFT BUCKLE SWITCH LICENSE PLATE LIGHT LIGHT FAILURE SENSOR LUGGAGE COMPARTMENT KEY UNLOCK SWITCH NCA WIRE PIONEER PLAYER RADIO RED/ WHT WIRE STEREO POWER AMPLIFIER STEREO POWER AMPLIFIER CD AUTOMATIC CHANGER W/ MEMORY 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

3.0L 4.0L ABS MTR RELAY ABS SOL RELAY ALT FUSE (3.0L) (4.0L) BATTERY BLK WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE DATA LINK CONNECTOR 3 DOME FUSE ENGINE CONTROL MODULE, PARK/NEUTRAL POSITION SWITCH FOG FUSE FOGLIGHT RELAY FUSE GENERATOR HAZ-HORN FUSE HORN RELAY, HAZARD SWITCH, THEFT DETERRENT HORN IG SW FUSE IGNITION MAIN RELAY IGNITION SWITCH INJ FUSE INTEGRATION RELAY JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) LOCK MAIN FUSE NCA WIRE OBD FUSE RADIO 1 FUSE RADIO 2 FUSE RED WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) REMOTE CONTROL MIRROR ECU REMOTE CONTROL MIRROR SWITCH SEAT HTR FUSE ST FUSE STARTER STEREO POWER AMPLIFIER, RADIO, PLAYER, AUTO ANTENNA MOTOR, RELAY, D/A CONVERTER TO CIG FUSE, JUNCTION BLOCK 1 (DIAGRAM 2 OF 3) TO DAYTIME RUNNING LIGHT RELAY 2 (DIAGRAM 3 OF 3) TO DEF FUSE, RELAY BLOCK 2 (DIAGRAM 3 OF 3) TO DOOR FUSE, JUNCTION BLOCK 1 (DIGRAM 2 OF 3) TO EFI FUSE RELAY BLOCK 2 (DIAGRAM 3 OF 3) TO GAUGE FUSE, JUNCTION BLOCK 1 (DIAGRAM 2 OF 3) TO IGN FUSE, JUNCTION BLOCK 1 (DIAGRAM 2 OF 3) WHT WIRE WHT/BLU WIRE WHT/RED WIRE