2003 Pontiac Grand Am Auto Alarm Wiring Diagram

Whether your an expert Pontiac Grand Am car alarm installer, Pontiac Grand Am performance fan or a novice Pontiac Grand Am enthusiast with a 2003 Pontiac Grand Am, a Pontiac Grand Am car alarm wiring diagram can save yourself a lot of time. One of the most time consuming tasks with installing an after market car alarm, car security, car remote start, automatic remote starter, shock sensor, tilt sensor, car alarm sensor or any auto alarm is identifying the correct color car security wires for a 2003 Pontiac Grand Am headlight bulb size you need for your low beam or high beam and save time. Also, find your other car light bulb sizes including your fog light, reverse light, turn signal, brake light and more. It’s that easy!

The Modified Life staff has taken all its Pontiac Grand Am car alarm wiring diagrams, Pontiac Grand Am car security wiring diagrams, Pontiac Grand Am car alarm wire diagrams, Pontiac Grand Am car security wiring schematics, Pontiac Grand Am car security diagrams, Pontiac Grand Am remote starter wiring diagrams and cataloged them online for our visitors to use for free. Our automotive wiring diagrams allow you to enjoy your new auto security electronics rather than spend countless hours trying to figure out which wires goes where.

Feel free to use any Pontiac Grand Am auto alarm wiring diagram that is listed on Modified Life but keep in mind that all information here is provided “as is” without any warranty of any kind and most of the auto security wiring diagrams listed on our enthusiast website are submitted by the Modified Life community. Use of the wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 2003 Pontiac Grand Am.

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2003 Pontiac Grand Am Auto Alarm Wiring Diagram

Battery Constant 12v+ Positive Wire (+): Red And Red/Black
Battery Constant 12v+ Positive Wire Location: Ignition Switch Harness

Starter Positive Wire (+): Yellow
Starter Positive Wire Location: Ignition Switch Harness

Ignition Positive Wire (+): Pink
Ignition Positive Wire Location: Ignition Switch Harness

Second Ignition Positive Wire (+): Dark Green
Second Ignition Positive Wire Location: Ignition Switch Harness

Accessory Positive Wire (+): Orange
Accessory Positive Wire Location: Ignition Switch Harness

Parking Light Positive Wire (+): Brown
Parking Light Positive Wire Location: At BCM, Light Gray Plug, Pin B8. 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.

Power Door Lock Negative Wire (-): White (1-Wire System). This vehicle is a 1-wire door locking system, that requires a (-) negative through a 1500 ohm resistor to unlock and a straight (-) negative to lock, some units will also require (2) extra relays.
Power Door Lock Negative Wire Location: At BCM, Light Gray Plug, Pin A2. 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.

Power Door Unlock Negative Wire (-): Same Wire
Power Door Unlock Negative Wire Location: N/A

Door Trigger Negative Wire (-): 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.
Door Trigger Negative Wire Location: N/A

Dome Light Supervision Wire (-): White
Dome Light Supervision Wire Location: At BCM, Pink Plug, Pin A 11. 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.

Trunk Release Negative Wire (-): Black
Trunk Release Negative Wire Location: At BCM, Light Gray Plug, Pin A7. 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.

Horn Negative Wire (-): Black
Horn Negative Wire Location: At BCM. The black (-) horn honk wire is in the smaller of the 2 gray plugs at the BCM.

Tachometer Wire Negative Wire (-): Purple/White Or White
Tachometer Wire Negative Wire Location: The tachometer wire is a white wire at the PCM (powertrain 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.

Brake Light Positive Wire (+): White
Brake Light Positive Wire Location: At Switch Above Brake Pedal

Factory Alarm Disarm Wire (-): N/A
Factory Alarm Disarm Wire Location: N/A

Factory Anti-Theft System: Yellow (+) And Black (-) And White (Not Used)
Factory Anti-Theft System Location: GM Passlock 2 System, Wires Are At The Top Of The Ignition Switch Tumbler