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Vehicle Wiring Details for your
1999-2002 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 1999-2002 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 (+) See NOTE *1   IGNITON SWITCH HARNESS
 STARTER  YELLOW (+) See NOTE *1  IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  PINK (+) See NOTE *1  IGNITION SWITCH HARNESS
 IGNITION 2  DARK GREEN (+) See NOTE *1  IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  ORANGE (+) See NOTE *1  IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  N/A  
 PARKING LIGHTS ( + )  BROWN (+)  IN PASSENGER KICK PANEL
 POWER LOCK  WHITE (1-Wire Door Lock System) See NOTE *2  @ BLACK Plug, in DRIVERS KICK PANEL
 POWER UNLOCK  Same wire, See DIAGRAM  See DIAGRAMS
 DOOR TRIGGER  See NOTE *3  IN DRIVERS KICK PANEL and PASSENGER KICK PANEL
 DOMELIGHT SUPERVISION  LIGHT GREEN/BLACK (-), Requires Part # 775 Relay  IN DRIVERS KICK PANEL
 TRUNK RELEASE  BLACK/WHITE (-), Requires Part # 775 Relay  IN DRIVERS KICK PANEL
 SLIDING POWER DOOR  N/A  
 HORN  BLACK (-)  @ STEERING COLUMN HARNESS
 TACH  WHITE  @ ECM, See NOTE *4
 WAIT TO START LIGHT  N/A  
 BRAKE  LIGHT BLUE (+)  @ 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 You will need to REMOVE the RADIO to get to the back of the IGNITION Switch on this vehicle. In some cases it may be necessary to remove the Instrument Cluster to access the IGNITION SWITCH Harness. 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, See DIAGRAM. NOTE *3 the LIGHT GREEN/BLACK (-) is for the DRIVERS DOOR this wire is located in the DRIVERS KICK PANEL. The PASSENGER DOOR wire is a LIGHT BLUE (-) is located in the PASSENGERS kick panel when connecting to an ALARM SYSTEM, use both DOOR TRIGGER wires and DIODE, to connect, See DIAGRAM. NOTE *4 the TACH wire is a WHITE wire at the ECM (Electronic Control Module) located to the LEFT of the STEERING COLUMN in the Large harness covered with GRAY tape heading out of the firewall. There will be at least 4 or 5 WHITE wires, you will need to test all these wires to find the right tach wire.
 
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