Lexus  GS300 1998-2003
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   WHITE/BLUE (+)   IGNITION SWITCH HARNESS
 STARTER  BLACK (+)  IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  BLACK/YELLOW (+)  IGNITION SWITCH HARNESS
 IGNITION 2  BLACK/WHITE (+)  IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  BLUE/YELLOW (+)  IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  YELLOW (-)  IGNITION SWITCH HARNESS
 PARKING LIGHTS ( - )  RED/YELLOW (-)  UNDER STEERING COLUMN
 PARKING LIGHTS ( + )  GREEN (+)  @ BOTTOM RIGHT OF FUSE PANEL
 POWER LOCK  See NOTE *1  See DIAGRAM
 POWER UNLOCK  See NOTE *1  See DIAGRAM
 DOOR TRIGGER  GREEN (-)  @ PIN 13 IN 25 PIN PLUG AT BODY ECU, See NOTE *2
 DOMELIGHT SUPERVISION  USE DOOR TRIGGER, Requires Part #775 Relay  
 TRUNK RELEASE  BLUE (+), Requires Part #775 Relay  @ 18 PIN PLUG, IN DRIVERS KICK PANEL
 SLIDING POWER DOOR  N/A  
 HORN  GREEN/BLACK (-)  @ STEERING COLUMN HARNESS
 TACH  BLACK/YELLOW  IN PIN 16 AT 28-PIN PLUG INSIDE ECU BOX, See NOTE *2
 WAIT TO START LIGHT  N/A  
 BRAKE  GREEN/WHITE (+)  IN 20-PIN PLUG IN DRIVERS KICK PANEL
 FACTORY ALARM DISARM   DISARMS with KEYSENSE wire  @ IGNITION SWITCH HARNESS
 ANTI-THEFT  TRANSPONDER ANTI-THEFT SYSTEM, REQUIRES 791 BYPASS MODULE AND EXTRA IGNITION KEY  TRANSPONDER @ IGNITION SWITCH TUMBLER
 EXTRA INFORMATION
 NOTE *1 THIS VEHICLE'S DOORLOCKS ARE SPECIAL AND WILL REQUIRE AN EXTRA RELAY, PART #775 AND 2 DIODES, TO CONNECT, See DIAGRAM NOTE *2 THE BODY ECU (ELECTRONIC CONTROL MODULE) IS LOCATED BEHIND THE FUSE PANEL IN THE PASSENGER KICK PANEL AT BODY ECU. NOTE *3 THE ECU (ELECTRONIC CONTROL UNIT) IS LOCATED UNDER THE HOOD ON THE DRIVERS SIDE.