Lexus  GS300 2004-2005
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   WHITE/BLUE (+)   @ IGNITION SWITCH HARNESS
 STARTER  BLACK (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  BLACK/WHITE (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  BLACK/YELLOW (+)  @ 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 (-)  @ HEADLIGHT SWITCH
 PARKING LIGHTS ( + )  GREEN (+)  @ 11 PIN PLUG, BOTTOM OF FUSEBOX
 POWER LOCK  See NOTE #2  See DIAGRAM
 POWER UNLOCK  See NOTE #2  See DIAGRAM
 DOOR TRIGGER  See NOTE #3  @ DOOR MODULE, IN EACH DOOR
 DOMELIGHT SUPERVISION  GREEN (-) See NOTE #4  @ PIN 13, BECU #2, See NOTE #4
 TRUNK RELEASE  PURPLE/YELLOW (-), Requires Part #775 Relay  @ TRUNK RELEASE SWITCH
 SLIDING POWER DOOR  N/A  
 HORN  GREEN/BLACK (-)  @ STEERING COLUMN HARNESS
 TACH  BLACK/YELLOW (AC)  @ INSTRUMENT CLUSTER
 WAIT TO START LIGHT  N/A  
 BRAKE  GREEN/WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   DISARMS with KEYSENSE wire, See NOTE #5  
 ANTI-THEFT  LEXUS TRANSPONDER ANTI-THEFT SYSTEM, See NOTE #1  TRANSPONDER @ IGNITION SWITCH TUMBLER
 EXTRA INFORMATION
 NOTE #1: LEXUS TRANSPONDER ANTI-THEFT SYSTEM, Requires Bypass Module, Part # 791 Bypass Module (for REMOTE STARTING ONLY!) an Extra Ignition key is required to be placed inside this module for Operation. Part # PK-ALL Bypass Module (for REMOTE STARTING ONLY!) KEYLESS BYPASS NO KEY is required for Operation. To order the Bypass Module go to the INTERFACE BYPASS MODULE Page on this website NOTE #2: THIS VEHICLE'S DOORLOCKS ARE SPECIAL AND WILL REQUIRE AN EXTRA RELAY, PART #775 AND 2 DIODES, TO CONNECT, See DIAGRAM NOTE #3: THE LEFT FRONT DOOR TRIGGER IS RED/GREEN (-),THE RIGHT FRONT IS RED/GREEN (-),THE LEFT REAR DOOR IS RED/WHITE (-), AND THE RIGHT REAR DOOR IS RED/YELLOW (-).USE ALL 4 DOOR TRIGGER WIRES AND DIODE ISOLATE, TO CONNECT, See DIAGRAM NOTE #4: THE BECU #2, IS ATTACHED TO THE BACK OF THE FUSEBOX IN THE DRIVERS KICK PANEL. NOTE #5: the vehicle can be disarmed without unlocking by attaching a (-) Negative output wire to the BLUE (-) KEYSENSE wire in the IGNITION SWITCH HARNESS.