Car Alarm Wiring Diagram and Car Wire Schematics – 2003 Nissan Altima


Whether your an expert installer or a novice enthusiast with a 2003 Nissan Altima, an automotive wiring diagram can save yourself time and headaches. One of the most time consuming tasks with installing a car alarm, remote car starter, car security system or any mobile electronics is identifying the correct wires for a 2003 Nissan Altima.

The Modified Life staff has put their heads together to create an invaluable resource containing car alarm wiring diagram, remote car starter wiring diagram, car wiring diagram and car security wiring diagram. Feel free to use any car alarm wiring diagram or remote car starter 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. 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 Nissan Altima.

If you can’t find your car alarm wiring diagram or remote start wire diagram on Modified Life, please feel free to post a car wiring diagram request (Car Alarm Wiring Diagram Request Page) and we’ll do our best to find you the information you need for your mobile installation.

2003 Nissan Altima Car Alarm and Remote Car Starter Wiring Information

Constant 12V+ Wire: Green
Constant 12V+ Wire Location: Ignition Switch Harness

Starter Wire (+): Black/Red
Starter Wire Location: Ignition Switch Harness

Second Starter Wire (+): Black/Yellow
Start Wire Location: Ignition Switch Harness

Ignition Wire (+): Black/Red
Ignition Wire Location: Ignition Switch Harness

Second Ignition Wire: N/A
Second Ignition Wire Location: N/A

Accessory Wire: Red
Accessory Wire Location: Ignition Switch Harness

Second Accessory Wire: White/Blue
Accessory Wire Location: Ignition Switch Harness

Tachometer Wire: Pink or Black (Not Red)
Tachometer Wire Location: Any ignition coil or fuel injector.

Key Sense Wire: Black/Red
Key Sense Location: Ignition harness or BCM, pin 37.

Door Lock Wire (-): Brown (These wires are only available on vehicles with left front only power window anti-pinch system. On vehicles with left AND right front power window anti-pinch system, use the factory alarm arm and disarm wires for door locks.)
Door Lock Wire Location: BCM to right of fuse box, pin 45.

Door Unlock Wire (-): Pink (These wires are only available on vehicles with left front only power window anti-pinch system. On vehicles with left AND right front power window anti-pinch system, use the factory alarm arm and disarm wires for door locks.)
Door Unlock Wire Location: BCM to right of fuse box, pin 46.

Door Trigger Wire (-): The LF door is light blue in pin 47, RF door is pink/blue in pin 12, LR door is red/black in pin 48, and RR door is red/white in pin 13. Use all four wires and diode isolate each.
Door Trigger Wire Location: BCM to right of fuse box.

Dome Supervision Wire: Red
Dome Supervision Wire Location: BCM to right of fuse box, pin 63.

Headlights Wire (-): N/A
Headlights Wire Location: N/A

Parking Light Positive Wire (+): Red/Blue
Parking Light Positive Wire Location: Harness in the rear inside driver kick panel.

Parking Light Negative Wire (-): N/A
Parking Light Negative Wire Location: N/A

Trunk/Hatch Pin Wire (-): Purple/White
Trunk/Hatch Pin Wire Location: BCM to right of fuse box, pin 42.

Hood Pin Wire (-): Light Green/Black
Hood Pin Wire Location: Hood pin switch under hood.

Trunk/Hatch Release Wire (-): Red/Black or Blue/Red
Trunk/Hatch Release Wire Location: BCM to right of fuse box, pin 30.

Factory Alarm Arm Wire: Pink/Blue
Factory Alarm Arm Wire Location: Driver door module in door, pin 4. (Meter this wire while turning the key in the driver door key cylinder. This wire will also lock the doors. On vehicles with left front only power window anti-pinch system, this wire is found at the BCM to the right of the fuse box, pin 8.)

Factory Alarm Disarm Wire (-): White/Blue
Factory Alarm Disarm Wire Location: Driver door module in door, pin 5. (Meter this wire while turning the key in the driver door key cylinder. Single pulse on this wire will disarm the factory alarm, and double pulse will unlock the doors. On vehicles with left front only power window anti-pinch system, this wire is found at the BCM to the right of the fuse box, pin 7.)

Factory Alarm Disarm but No Unlock Wire (-): N/A
Factory Alarm Disarm Wire Location: N/A

Horn Trigger Wire (-): Green/White
Horn Trigger Wire Location: Horn Switch in Steering Column

Brake Wire (+): Red/Green
Brake Wire Location: Brake Pedal Switch

Leave a Reply

Your email address will not be published. Required fields are marked *

one + six =