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Vehicle Wiring Details for your
2003-2005 Chevrolet Astro 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 2003-2005 Chevrolet Astro . 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   RED (+)   @ IGNITION SWITCH HARNESS
 STARTER  YELLOW (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  PINK (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  WHITE (+)  @ IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  ORANGE (+)  @ IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  BROWN (+)  @ IGNITION SWITCH HARNESS
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  WHITE (-)  @ BCM, LT. BLUE PLUG, PIN A5, SEE NOTE #3, ALSO AT RELAY, TO THE LEFT OF FUSEBOX
 PARKING LIGHTS ( + )  BROWN (+)  @ HEADLIGHT SWITCH or @ BCM, LT BLUE PLUG, PIN B6, SEE NOTE #3
 POWER LOCK  LIGHT BLUE (TYPE A)  IN DRIVERS KICK PANEL or BCM, BROWN PLUG, PIN A4, SEE NOTE #3
 POWER UNLOCK  WHITE (TYPE A)  IN DRIVERS KICK PANEL or BCM, BROWN PLUG, PIN A3, SEE NOTE #3
 DOOR TRIGGER  SEE NOTE #2  @ THE BCM, SEE NOTE #3
 DOMELIGHT SUPERVISION  GRAY/BLACK (-)  @ BCM, LT BLUE PLUG, PIN A3, SEE NOTE #3 or @ RELAY ABOVE THE DATA LINK CONNECTOR, DRIVERS SIDE OF DASH
 TRUNK RELEASE  LT GREEN (+) (LIFTGATE GLASS)  @ SWITCH OR RELAY IN PASSENGER SIDE REAR QUARTER PANEL
 SLIDING POWER DOOR  N/A  
 HORN  BLACK (-)  @ HORN SWITCH IN COLUMN
 TACH  WHITE (AC)  @ PCM, GREEN PLUG, PIN 26, SEE NOTE #4
 WAIT TO START LIGHT  N/A  
 BRAKE  WHITE (+)  @ BRAKE SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   N/A  
 ANTI-THEFT  USES GM'S PASSLOCK 2 SYSTEM, REQUIRES 791 BYPASS MODULE, SEE NOTE #1  @ IGNITION SWITCH
 EXTRA INFORMATION
 NOTE #1: THIS VEHCILE USES GM'S PASSLOCK 2 ANTI-THEFT SYSTEM THAT REQUIRES PART #791 BYPASS WHEN REMOTE STARTING, TO ORDER GO TO THE SECURITY BYPASS PAGE ON THIS WEBSITE. NOTE #2: THE DRIVERS DOOR IS A DARK BLUE(-) IN THE PURPLE PLUG, PIN B4. THE PASSENGER DOOR IS A ORANGE (-) IN THE PURPLE PLUG, PIN B2. THE SLIDING DOOR IS A PINK (-) IN THE LIGHT BLUE PLUG, PIN B10. USE ALL 3 WIRES AND DIODE ISOLATE. NOTE #3: THE BCM IS LOCATED ABOVE THE CLIMATE CONTROLS IN THE CENTER OF THE DASH. NOTE #4: THE PCM IS LOCATED BELOW THE BATTERY
 
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