Lexus RX I (1997-2003) (dash harness, left side of dash) Wiring diagrams

1 2 5 6 9 11 17 RDR+ BECU SH RDR- 13 12 5 12 MPX+ MPX- 18 19 BDSU BDSL 2 5 6 10 11 13 14 16 17 18 19 23 24 25 A- SIG KL 21 17 MPX+ MPX- 5 6 8 BCTY HCTY KSW A+ BDR LSW CTY CPUB KUL CTYE LSWE GND BLK WIRE BLK/ORG WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND LEFT SIDE OF DASH) BSUB IG IND COMBINATION METER ECU D RR DOOR FUSE DOOR LOCKS SYSTEM DRIVER DOOR ECU (IN LEFT FRONT DOOR) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) FRONT PASSENGER DOOR ECU (IN RIGHT FRONT DOOR) GAUGE FUSE GRN/BLK WIRE GRY WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN ON OR START IMLD INSTRUMENT CONTROL PANEL INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/B 3 (BEHIND UPPER CENTER OF DASH) J/C 5 (BEHIND UPPER LEFT SIDE OF DASH) J/C 9 (BEHIND RIGHT KICK PANEL) LEFT FRONT DOOR COURTESY SWITCH LSWA LT GRN WIRE LT GRN/BLK WIRE LT GRN/RED WIRE P FR DOOR FUSE P RR DOOR FUSE PNK WIRE PNK/BLU WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RIGHT FRONT DOOR COURTESY SWITCH THEFT DETERRENT INDICATOR LIGHT VIO WIRE WHT WIRE WHT/BLK (OR YEL/RED) WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/RED WIRE

1 4 5 8 9 13 14 15 17 18 19 25 A- A- 4 5 8 9 13 14 15 17 18 19 20 25 BACK DOOR COURTESY SWITCH BLK WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE CTY SIG A+ BDR CPUB LSW CTYE LSWE CTY SIG A+ BDR CPUB LSW CTYE LSWE GND DOOR LOCKS SYSTEM ECU-B FUSE ENGINE HOOD COURTESY SWITCH (ON FRONT CENTER OF ENGINE COMPARTMENT) ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPARTMENT) F/L DOOR FUSE GRN/BLK WIRE GRY WIRE GRY/RED WIRE HOT AT ALL TIMES J/C 1 (IN ENGINE COMPARTMENT, ON RIGHT FRONT FENDER) J/C 14 (IN LEFT SIDE OF LIFTGATE) J/C 7 (UPPER LEFT END OF DASH) JUNCTION CONNECTOR (LEFT KICK PANEL) LEFT REAR DOOR COURTESY SWITCH LEFT REAR DOOR ECU (IN LEFT REAR DOOR LT GRN WIRE LT GRN/BLK WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT REAR DOOR COURTESY SWITCH RIGHT REAR DOOR ECU (IN RIGHT REAR DOOR) THEFT DETERRENT HORN (IN RIGHT REAR CORNER OF ENGINE COMPARTMENT) UNLOCK WARNING SWITCH VIO WIRE WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL/RED WIRE

12 13 12 5 MPX- MPX+ 15 16 17 RCO RDA RSSI 2 9 11 BECU 4 5 10 11 14 17 18 21 23 25 CYL SIG 5 10 BCTY ILE BDR CTY CPUB CTYB CTYE GND BLK WIRE BLK/ORG WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND LEFT SIDE OF DASH) BSUB IG COMBINATION METER ECU CTY SIG BDR CPUB CTYE GND D RR DOOR FUSE DRIVER DOOR ECU (IN LEFT FRONT DOOR) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) FRONT PASSENGER DOOR ECU (IN RIGHT FRONT DOOR) GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT CONTROL PANEL INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/B 3 (BEHIND UPPER CENTER OF DASH) J/C 3, J/C 4 (LEFT KICK PANEL) J/C 5 (TOP OF LEFT KICK PANEL) J/C 9 (RIGHT END OF DASH) LEFT FRONT DOOR COURTESY LIGHT LEFT FRONT DOOR COURTESY SWITCH LEFT REAR DOOR COURTESY SWITCH LEFT REAR DOOR ECU (IN LEFT REAR DOOR LT GRN WIRE OPEN DOOR INDICATOR P FR DOOR FUSE P RR DOOR FUSE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR COURTESY LIGHT RIGHT FRONT DOOR COURTESY SWITCH SOLID STATE VCC CODE SQ VIO WIRE W/ NAV W/O NAV WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE WIRELESS DOOR LOCK ECU (IN CENTER OF VEHICLE) YEL WIRE YEL/BLK WIRE YEL/RED WIRE

BLK WIRE BLU WIRE BLU/BLK WIRE BODY ECU (BEHIND LEFT SIDE OF DASH) DFG ENGINE ROOM JUNCTION BLOCK (ON LEFT SIDE OF ENGINE COMPARTMENT) FR DEF FUSE FRONT WINDOW DEFOGGER FUSIBLE LINK BLOCK (IN ENGINE ROOM JUNCTION BLOCK) GAUGE FUSE GRY WIRE GRY/RED WIRE HEATER FUSE HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT PANEL JUNCTION BLOCK (BEHIND LEFT SIDE OF DASH) J/C 14 (IN LEFT SIDE OF TAILGATE) J/C 5 (BEHIND UPPER LEFT SIDE OF DASH) J/C 5 (LEFT KICK PANEL) J/C 9 (BEHIND RIGHT KICK PANEL) LEFT REMOTE CONTROL MIRROR MIRROR HEATER MIRROR HEATER MIRROR HEATER RELAY (IN RELAY BLOCK 1) NOISE FILTER (REAR WINDOW DEFOGGER) REAR DEFOG RELAY RED WIRE RED/YEL WIRE RIGHT REMOTE CONTROL MIRROR RR DEF FUSE WHT WIRE WHT/BLK WIRE YEL WIRE

A/F HEATER RELAY AUTO ANTENNA MOTOR, RELAY BLK WIRE BODY ECU BRN WIRE COIL CONTACT CRUISE CONTROL ACTUATOR CRUISE CONTROL ECU CRUISE CONTROL SWITCH (PART OF COMBINATION SWITCH) DRIVER DOOR ECU LEFT REMOTE CONTROL MIRROR EFI RELAY FROM GROUND FROM J/C 2 (CAVITY A) (DIAGRAM 1 OF 5) FRONT PASSENGER'S POWER SEAT CONTROL SWITCH FRONT PASSENGER'S SEAT HEATER FRONT WINDOW DEFOGGER HEATER ELEMENT GND INNER MIRROR, COMPASS J/C 15 (UNDER RIGHT REAR SEAT) J/C 18 (UNDER PASSENGER'S SEAT) J/C 5 (BEHIND UPPER LEFT SIDE OF DASH) LEFT VANITY LIGHT, GARAGE DOOR OPENER MOON ROOF CONTROL ECU MOON ROOF CONTROL SWITCH PERSONAL LIGHT R/B 2 RIGHT BUCKLE SWITCH RIGHT REAR COMBINATION LIGHT RIGHT REAR DOOR ECU RIGHT REAR SIDE MARKER LIGHT RIGHT REAR TURN SIGNAL LIGHT RIGHT STOP LIGHT RIGHT TAILLIGHT RIGHT VANITY LIGHT RR DEF RELAY STARTER RELAY STEREO COMPONENT AMPLIFIER TELEPHONE ECU W/MOON- ROOF W/O MOON- ROOF WHT WIRE WHT/BLK WIRE

1 2 3 4 CLTB 2 12 14 15 16 BECU HRLY DRL HEAD TAIL 21 17 MPX+ MPX- 5 6 7 9 12 20 21 IG FFGO TRLY CLTE CLTB 8 19 20 KSW PKB HF AUTOMATIC LIGHT CONTROL SENSOR BDR CTY CPUB CTYE GND BLK WIRE BLK/ORG WIRE BLU WIRE BLU/BLK WIRE BODY ECU (BEHIND LEFT SIDE OF DASH) BRN/WHT WIRE CLTE CLTS CLTS COMBINATION METER ECU COMBINATION SWITCH DIMMER SWITCH DRIVER DOOR ECU (IN LEFT FRONT DOOR) ECU-B FUSE DOME FUSE ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPARTMENT) F/L DOOR FUSE FOGLIGHT SWITCH GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE H-LP L LWR FUSE H-LP R LWR FUSE HEADLAMP RELAY HIGH HIGH FLASH FLASH LOW LOW HIGH LOW FLASH HOT AT ALL TIMES HU FFOG INSTRUMENT CONTROL PANEL INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/B 5 (BEHIND UPPER LEFT SIDE OF DASH) J/C 1 (IN ENGINE COMPARTMENT, ON RIGHT FRONT FENDER) J/C 2 (IN LEFT FRONT OF ENGINE COMPARTMENT, BEHIND HEADLIGHT) J/C 5 (TOP OF LEFT KICK PANEL) J/C 7 (UPPER LEFT END OF DASH) J/C 9 (BEHIND RIGHT KICK PANEL) LEFT FRONT DOOR COURTESY SWITCH LEFT LOW BEAM HEADLIGHT LIGHT CONTROL SWITCH LT GRN WIRE LT GRN/RED WIRE MAIN FUSE MPX OFF PNK WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT LOW BEAM HEADLIGHT TAIL HEAD OFF AUTO UNLOCK WARNING SWITCH W/ HID W/O HID W/O HID W/ HID WHT WIRE WHT/BLK WIRE YEL/BLK WIRE YEL/RED WIRE

2 INDICATOR 5 12 PI SPD A/T OIL TEMP INDICATOR ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU/WHT WIRE BRAKE INDICATOR BRN WIRE BRN/WHT WIRE COMBINATION METER ECU CRUISE CONTROL ECU (BEHIND LEFT SIDE OF DASH) CRUISE CONTROL, ENGINE CONTROL, NAVIGATION SYSTEMS DATA LINK CONNECTOR (DLC) 3 (PARTIAL) (UNDER LEFT SIDE OF DASH) DRIVER DOOR ECU (IN LEFT FRONT DOOR) ECT SNOW INDICATOR ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE CONTROLS SYSTEM FUEL GAUGE FUEL INDICATOR FUEL SENDER (MAIN) (ON TOP OF FUEL TANK) FUEL SENDER (SUB) (UNDER CENTER OF VEHICLE) GRN WIRE GRN/BLK WIRE GRN/YEL WIRE GRY/BLU WIRE HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM ANTI-LOCK BRAKES SYSTEM HEATER FUSE HOT AT ALL TIMES HOT IN ON OR START INDICATOR INSTRUMENT CONTROL PANEL INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/B 3 (BEHIND UPPER CENTER OF DASH) LEFT TURN INDICATOR LIGHT FAILURE SENSOR (IN LEFT SIDE OF LUGGAGE COMPARTMENT) LT GRN/BLK WIRE LT GRN/RED WIRE MPX ODLP ODNS OIL INDICATOR ORG/ WIRE PNK WIRE REAR LIGHTS INDICATOR RED WIRE RED/BLK WIRE RED/WHT WIRE RED/YEL WIRE RIGHT TURN INDICATOR SEAT BELT INDICATOR SOLID STATE SPEEDOMETER SRS-B FUSE SUPPLEMENTAL RESTRAINTS SYSTEM TACHOMETER TO COMBINATION METER ECU (DIAGRAM 2 OF 2) VIO/WHT WIRE WATER TEMP GAUGE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED (OR YEL/BLK) WIRE YEL/RED WIRE

1 2 6 9 11 17 RDR+ BECU RDR- 1 2 SOLID STATE 15 16 17 18 19 RCO RDA RSSI BDSU BDSL 2 5 6 10 11 13 14 16 17 18 19 23 24 25 A- SIG KL 5 12 13 12 MPX+ MPX- A+ BDR LSW CTY CPUB KUL CTYE LSWE GND BACK DOOR COURTESY SWITCH BACK DOOR KEY LOCK, UNLOCK SWITCH BACK DOOR MOTOR ASSEMBLY (IN LIFTGATE) BACK DOOR UNLOCK DETECTION SWITCH BLK WIRE BLK/ORG WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND LEFT SIDE OF DASH) BSUB IG BZR BCTY KSW COMBINATION METER ECU D RR DOOR FUSE DOOR KEY LOCK, UNLOCK SWITCH DOOR LOCK MOTOR DOOR UNLOCK DETECTION SWITCH DRIVER DOOR ECU (IN LEFT FRONT DOOR) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) 18 11 18 11 GAUGE FUSE GRN WIRE GRN/BLK WIRE GRY WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT CONTROL PANEL INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/B 3 (BEHIND UPPER CENTER OF DASH) J/C 14 (IN LEFT SIDE OF LIFTGATE) J/C 5 (TOP OF LEFT KICK PANEL) JUNCTION CONNECTOR (LEFT KICK PANEL) LEFT FRONT DOOR COURTESY SWITCH LEFT FRONT DOOR LOCK ASSEMBLY (IN LEFT FRONT DOOR) LOCK LSWA LT GRN WIRE LT GRN/RED WIRE MPX+ MPX- P FR DOOR FUSE P RR DOOR FUSE PNK WIRE PNK/BLU WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE UN- LOCK LOCK UNLOCK UNLOCK DOOR LOCK CONTROL SWITCH VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE WIRELESS DOOR LOCK BUZZER (W/KEYLESS ENTRY) YEL WIRE YEL/BLK WIRE YEL/RED WIRE

1 5 6 8 9 10 11 12 14 15 17 18 19 20 23 24 25 UP SIG KL LMT 13 12 MPX+ MPX- AUTO AUTO DOWN AUTO UP BLK WIRE BLK/ORG WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND LEFT SIDE OF DASH) BSUB IG COMBINATION METER ECU D RR DOOR FUSE DOWN DOWN UP DRIVER DOOR ECU (IN LEFT FRONT DOOR) GAUGE FUSE GRN WIRE GRN/BLK WIRE GRY WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT CONTROL PANEL INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/B 3 (BEHIND UPPER CENTER OF DASH) J/C 5 (TOP OF LEFT KICK PANEL) JUNCTION CONNECTOR (LEFT KICK PANEL) LEFT FRONT DOOR COURTESY SWITCH LEFT FRONT DOOR KEY LOCK/ UNLOCK SWITCH LEFT FRONT POWER WINDOW MOTOR LEFT REAR SWITCH LIMIT SWITCH LOCK UNLOCK LT GRN WIRE LT GRN/BLK WIRE LT GRN/RED WIRE MPX+ MPX- P FR DOOR FUSE P RR DOOR FUSE PNK WIRE PNK/BLU WIRE PULSE SENSOR RCO RDA RSSI RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RIGHT FRONT SWITCH RIGHT REAR SWITCH SGND BDR DN CTY CPUB KUL PLS CTYE LSWE GND UP DOWN VCC CODE SQ VIO WIRE W/ NAVIGATION W/O NAVIGATION WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE WINDOW LOCK SWITCH WIRELESS DOOR LOCK ECU (W/KEYLESS ENTRY) (IN CENTER OF VEHICLE) YEL WIRE YEL/BLK WIRE YEL/RED WIRE