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Vehicle Wiring Details for your
2003-2006 Pontiac Grand Am 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 2003-2006 Pontiac Grand Am . 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 (+) and RED/BLACK (+)   @ IGNITION SWITCH HARNESS
 STARTER  YELLOW (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  PINK (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  DARK GREEN (+)  @ IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  ORANGE (+)  @ IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  N/A  
 PARKING LIGHTS ( + )  BROWN (+)  @ BCM, LIGHT GRAY Plug, Pin B8, See NOTE #1
 POWER LOCK  WHITE (1-Wire System) See NOTE #2  @ BCM, LIGHT GRAY Plug, Pin A2, See NOTE #1
 POWER UNLOCK  Same wire, See DIAGRAM  See DAIGRAMS
 DOOR TRIGGER  See NOTE #3  
 DOMELIGHT SUPERVISION  WHITE (-)  @ BCM, PINK Plug, Pin A 11, See NOTE #1
 TRUNK RELEASE  BLACK (-)  @ BCM, LIGHT GRAY Plug, Pin A7, See NOTE *1
 SLIDING POWER DOOR  N/A  
 HORN  BLACK (-)  @ BCM, See NOTE #5
 TACH  PURPLE/WHITE or WHITE (AC)  See NOTE #4
 WAIT TO START LIGHT  N/A  
 BRAKE  WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   N/A  
 ANTI-THEFT  YELLOW (+) and BLACK (-) and WHITE (Not Used)  GM's PASSLOCK 2 System, wires are at the top of the Ignition Switch Tumbler
 EXTRA INFORMATION
 NOTE #1: the BCM (Body Control Module) is located between the BLOWER MOTOR and the PASSENGER KICK PANEL, under the GLOVE BOX, it has 3 Plugs, 2 GRAY and 1 PINK. NOTE #2: this vehicle uses a 1-Wire DOOR LOCKING SYSTEM, that requires a (-)Negative thru a 1500 Ohm Resistor to UNLOCK and a straight (-)Negative to LOCK, some units will also require (2) extra relays Part #775, to connect, See DIAGRAM. NOTE #3: the LIGHT GREEN/BLACK (-) is for the DRIVERS DOOR this wire is located at the BCM, GREY Plug Pin B7. The PASSENGER DOOR (and Rear doors if 4-door) wire is a LIGHT BLUE (-) is located at the BCM, LIGHT GREY Plug, Pin B10 when connecting to an ALARM SYSTEM, use both DOOR TRIGGER wires and DIODE ISOLATE, to connect, See DIAGRAM. NOTE #4: the TACH wire is a WHITE wire at the PCM (Powertrian Control Module) on the 2.2L engine, in a BLACK Plug, Pin 19. On the 3.4L engine, it is a PURPLE/WHITE at the BLUE Plug, Pin 8, at the PCM. NOTE #5: the BLACK (-) Horn Honk wire is in the Smaller of the 2 GRAY plugs at the BCM.
 
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