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Vehicle Wiring Details for your
2002-2007 Lexus Sc430 Wiring Diagram
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Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 2002-2007 Lexus Sc430 . This information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle. Please be sure to test all of your wires with a digital multimeter before making any connections. More information on using a multimeter and testing wires please see our Technical Support Area.


 PART   COLOR  LOCATION
 12 VOLT CONSTANT   BLACK/RED (+)   @ IGNITION SWITCH HARNESS
 STARTER  WHITE/RED (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  BLACK (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  BLUE (+) (Thin wire)  @ IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  WHITE/GREEN (+) (Thin wire)  @ IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  LIGHT GREEN/BLACK (-)  @ IGNITION SWITCH HARNESS, 4-Pin Plug
 PARKING LIGHTS ( - )  YELLOW (-) See NOTE #2  @ CENTER PLUG OF A/C DISPLAY UNIT
 PARKING LIGHTS ( + )  DO NOT USE!!!  
 POWER LOCK  BLUE/BLACK (TYPE B) See NOTE #1  @ MODULE INSIDE DRIVERS DOOR
 POWER UNLOCK  BLUE/WHITE (TYPE B) See NOTE #1  @ MODULE INSIDE DRIVERS DOOR
 DOOR TRIGGER  BLUE (-)  @ UNDERDASH LIGHT
 DOMELIGHT SUPERVISION  USE DOOR TRIGGER, Requires Part #775 Relay  
 TRUNK RELEASE  WHITE (-), Requires Part #775 Relay  @ TRUNK RELEASE SWITCH
 SLIDING POWER DOOR  N/A  
 HORN  RED/BLUE (-)  INSIDE THE UNDERHOOD FUSEBOX
 TACH  BLACK/YELLOW (AC)  @ 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 #3  @ 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: TEST THESE WIRES BY TURNING THE KEY IN THE DRIVERS DOOR KEY CYLINDER. NOTE #2: THE PARKING LIGHTS ARE MULTIPLEX FROM THE HEADLIGHT SWITCH.BETTER TO USE THE HAZARD LIGHTS.THE HAZARD LIGHTS ARE YELLOW (-) AT CENTER PLUG OF A/C DISPLAY UNIT. NOTE #3: the vehicle can be disarmed without unlocking by attaching a (-) Negative output wire to the LIGHT GREEN/BLACK (-) KEYSENSE wire in the IGNITION SWITCH HARNESS.
 
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