Lexus  IS300 2004-2005
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   WHITE (+) and WHITE/RED (+)   @ IGNITION SWITCH HARNESS
 STARTER  BLACK/WHITE (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  BLACK/RED (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  BLUE/RED (+)  @ IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  RED (+)  @ IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  BLACK/YELLOW (-)  @ IGNITION SWITCH HARNESS
 PARKING LIGHTS ( - )  RED (-)  @ HEADLIGHT SWITCH
 PARKING LIGHTS ( + )  GREEN/BLACK (+)  RIGHT side of DRIVERS FUSEBOX, 13-Pin Plug
 POWER LOCK  See NOTE #1  See DIAGRAM
 POWER UNLOCK  See NOTE #1  See DIAGRAM
 DOOR TRIGGER  See NOTE #2  @ BODY ECU, See NOTE #4
 DOMELIGHT SUPERVISION  RED/WHITE (-)  @ 8 PIN PLUG RIGHT SIDE OF DRIVERS FUSEBOX
 TRUNK RELEASE  BLUE/WHITE (5 WIRE) See NOTE #4  @ BODY ECU, TOP OF FUSEBOX
 SLIDING POWER DOOR  N/A  
 HORN  GREEN/WHITE (-)  @ HORN SWITCH in Column Cover.
 TACH  BLACK  DATA LINK CONNECTOR UNDER DRIVERS DASH
 WAIT TO START LIGHT  N/A  
 BRAKE  GREEN/WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   DISARMS with KEYSENSE wire, See NOTE *2  @ IGNITION SWITCH HARNESS
 ANTI-THEFT  LEXUS TRANSPONDER ANTI-THEFT SYSTEM, See NOTE #5  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 DRIVERS DOOR TRIGGER IS RED/GREEN (-),THE FRONT PASSENGER DOOR IS RED/BLACK(-),THE REAR DOORS IS RED/BLUE (-). WHEN CONNECTING AN ALARM SYSTEM USE ALL 3 DOOR TRIGGER WIRES AND DIODE ISOLATE. TO CONNECT, SEE DIAGRAM NOTE #3: the vehicle can be disarmed without unlocking by attaching a (-) Negative output wire to the BLACK/YELLOW (-) KEYSENSE wire in the IGNITION SWITCH HARNESS. NOTE #4: THE TRUNK/HATCH RELEASE ON THIS VEHICLE WILL REQUIRE AN EXTRA RELAY PART #775 FOR THE 5-WIRE SYSTEM, TO CONNECT, See DIAGRAM NOTE #5: TOYOTA'S TRANSPONDER ANTI-THEFT SYSTEM, Requires part #791 Bypass Module and an extra ignition key for remote starting. Part # PK-ALL Bypass, NO EXTRA KEY REQUIRED!! To order go to the INTERFACE Bypass Module Page on this website.