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Vehicle Wiring Details for your
2008- Lexus IS350 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 2008- Lexus IS350 . 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   WHITE (+)   @ DRIVERS FUSE BOX, 1-PIN PLUG, PIN 1
 STARTER  BLACK (-)  @ POWER SWITCH, (BLACK, 14-PIN PLUG) PIN 7 or PSCM, (40-PIN PLUG) PIN 14, NOTE #3
 STARTER 2  LT. BLUE (-)  @ POWER SWITCH, (BLACK, 14-PIN PLUG) PIN 2 or PSCM, (40-PIN PLUG) PIN 37, NOTE #3
 IGNITION 1  LT. GREEN (+) (NOT for REMOTE START)  @ PSCM, (40-PIN PLUG) PIN 35, NOTE #3
 IGNITION 2  PINK (+) (NOT for REMOTE START)  @ PSCM, (40-PIN PLUG) PIN 34, NOTE #3
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  LT. GREEN (+) (NOT for REMOTE START)  @ PSCM, (40-PIN PLUG) PIN 11, NOTE #3
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  YELLOW (-)  @ DRIVERS FUSE BOX, 28-PIN PLUG, PIN 5, NOTE #9
 PARKING LIGHTS ( + )  BROWN (+) (REAR) NOTE #4  @ DRIVERS FUSE BOX, (GRAY, 30-PIN PLUG), PIN 24, NOTE #9
 POWER LOCK  BROWN (TYPE B), NOTE #7  @ PASSENGERS FUSE BOX, (GRAY, 30-IN PLUG) PIN 7
 POWER UNLOCK  BLACK (TYPE B), NOTE #8  @ PASSENGERS FUSE BOX, (GRAY, 30-IN PLUG) PIN 10
 DOOR TRIGGER  WHITE to RED (-)  @ BECU (RH), (16-PIN PLUG) PIN 14, NOTE #5
 DOMELIGHT SUPERVISION  PURPLE to PINK (-)  @ BECU (LH), (10-PIN PLUG) PIN 2, NOTE #6
 TRUNK RELEASE  PINK (-)  @ RELEASE SWITCH or BECU (RH), (28-PIN PLUG) PIN 3, NOTE #5
 SLIDING POWER DOOR  N/A  
 HORN  WHITE (-)  @ HORN SWITCH, under STEERING COLUMN Cover
 TACH  WHITE (AC)  @ DATA LINK Connector, pin 9, under Drivers Dash
 WAIT TO START LIGHT  N/A  
 BRAKE  RED/BLACK (+)  @ BRAKE SWITCH, above Brake Pedal
 FACTORY ALARM DISARM   WHITE (-) Requires Double Pulse, NOTE #2  @ POWER WINDOW MASTER SWITCH, (20-PIN PLUG) PIN 14
 ANTI-THEFT  TOYOTA'S TRANSPONDER SYSTEM, See NOTE #1  
 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: TEST this wire while turning the Key in the Drivers Door. NOTE #3: the PSCM (Power Source Control Module) is located under the PASSENGER Dash and behind the GLOVE BOX. NOTE #4: the FRONT PARKING LIGHT wire is a BLUE (+) @ the DRIVERS side HEADLIGHT Assembly NOTE #5: the BECU (RH) (Body Electronic Control Unit ( Right Hand) is part of the PASSENGER DASH FUSE BOX, located behind the GLOVE BOX. NOTE #6: the BECU (LH) (Body Electronic Control Unit ( Left Hand) is part of the DRIVERS side FUSE BOX, located under the Drivers side of the Dash. NOTE #7: this wire is only needed if the Door Locks do not function with the Aftermarket System while the vehicle is running. All other times just use the Factory Alarm Arm wire. NOTE #8: this wire is only needed if the Door Locks do not function with the Aftermarket System while the vehicle is running. All other times just use the Factory Alarm Disarm wire. NOTE #9: the plug is located on the FUSE BOX side and faces the Firewall.
 
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