Whether your an expert installer or a novice enthusiast with a 2003 Honda Accord, 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 Honda Accord.
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 Honda Accord.
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 Honda Accord Car Alarm and Remote Car Starter Wiring Information
Constant 12V+ Wire: White
Constant 12V+ Wire Location: Ignition Switch Harness
Starter Wire (+): Black/White
Starter Wire Location: Ignition Switch Harness
Second Starter Wire (+): N/A
Start Wire Location: N/A
Ignition Wire (+): Black/Yellow
Ignition Wire Location: Ignition Switch Harness
Second Ignition Wire: N/A
Second Ignition Wire Location: N/A
Accessory Wire: Black/Red
Accessory Wire Location: Ignition Switch Harness
Second Accessory Wire: White/Red
Accessory Wire Location: Ignition Switch Harness
Key Sense Wire (-): Red/White or Red/Black
Key Sense Location: Ignition harness or MICU, green plug, pin 13. The MICU (Multiplex Integrated Control Unit) is part of the under dash fuse/relay box. The plug(s) for the MICU is on the left side edge of the fuse/relay box.
Tachometer Wire: Blue/Red or Blue
Tachometer Wire Location: ECM/PCM. The ECM/PCM is on the front of the transmission tunnel. The connectors are on the passenger side. On the 4 cylinder models the tachometer wire is in the white 31 pin connector E, pin 25. On the 6 cylinder models it is in the gray connector A, pin 23. Can also go to any ignition coil and use the wire that is NOT black/white or black. Can also go to any fuel injector and use the wire that is NOT yellow/black.
Door Lock Wire (-): Pink/Black
Door Lock Wire Location: MICU, green plug, pin 25. The MICU (Multiplex Integrated Control Unit) is part of the underdash fuse/relay box. The plug(s) for the MICU is on the left side edge of the fuse/relay box. Meter this wire while pressing the passenger door lock switch.
Door Unlock Wire (-): Pink/Blue
Door Unlock Wire Location: MICU, green plug, pin 9. The MICU (Multiplex Integrated Control Unit) is part of the underdash fuse/relay box. The plug(s) for the MICU is on the left side edge of the fuse/relay box. Meter this wire while pressing the passenger door lock switch.
Door Trigger Wire (-): The LF door is green in a lt. green 16 pin plug, pin 15. The RF door is lt. green/red in a lt. green 14 pin plug, pin 12. The LR door is green/yellow in a lt. green 16 pin plug, pin 14. The RR door is green/white in a lt. green 14 pin plug, pin 13. Use all four wires and diode isolate each.
Door Trigger Wire Location: Back of Fuse Box.
Dome Supervision Wire: Green/Red
Dome Supervision Wire Location: Back of fuse box, light green 5 pin plug.
Headlights Wire (-): N/A
Headlights Wire Location: N/A
Parking Light Positive Wire (+): Red/Black
Parking Light Positive Wire Location: Top of fuse box, large white plug.
Parking Light Negative Wire (-): Red/Black
Parking Light Negative Wire Location: Headlight switch in column cover.
Trunk/Hatch Pin Wire (-): Blue/Black
Trunk/Hatch Pin Wire Location: MICU, green plug, pin 24. The MICU (Multiplex Integrated Control Unit) is part of the underdash fuse/relay box. The plug(s) for the MICU is on the left side edge of the fuse/relay box.
Hood Pin Wire (-): Yellow/Red to Green/Black
Hood Pin Wire Location: Hood pin switch in latch.
Trunk/Hatch Release Wire (+): Yellow/Green
Trunk/Hatch Release Wire Location: Harness to the rear of driver kick panel.
Factory Alarm Arm Wire: Blue/White to White/Red
Factory Alarm Arm Wire Location: Driver door module in door.
Factory Alarm Disarm Wire (-): Black/Red to White
Factory Alarm Disarm Wire Location: Driver door module in door.
Factory Alarm Disarm but No Unlock Wire (-): N/A
Factory Alarm Disarm Wire Location: N/A
Horn Trigger Wire (-): Green/Yellow
Horn Trigger Wire Location: Steering Column
Brake Wire (+): White/Black
Brake Wire Location: Brake Pedal Switch
Emergency Parking Brake Wire (-): Green/Orange
Emergency Parking Brake Wire Location: Top of fuse box, large white plug.
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