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2003 Ford Focus Wiring Diagrams

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=28573
Printed Date: May 15, 2025 at 8:28 AM


Topic: 2003 Ford Focus Wiring Diagrams

Posted By: Elrockss
Subject: 2003 Ford Focus Wiring Diagrams
Date Posted: March 17, 2004 at 7:29 PM

I am wondering if anyone has their hands on the wiring detail for a 2003 Ford Focus they'd be willing to share??
I am needing to know all related color code/location info for installing a full blown alarm with twindows. Any help you could swing my way, I'd be happy to throw back at you on your project if needed, or otherwise.

Thanks for the help!posted_image

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elrock-SS



Replies:

Posted By: boomer_106
Date Posted: March 17, 2004 at 9:15 PM

Ford

Focus

2003

Remote Starter  Wiring Colors and Notes

Function

 

Vehicle  Color

Location

Start:

 

Gray/Black (+)

Ignition switch harness

Ignition  #1:

 

GREEN/ YELLOW (+)

Ignition switch harness*

Ignition #2:

 

N/A

Ignition  #3:

 

N/A

Accessory:

 

Yellow (+)

Ignition switch harness

Brake  Light:

 

Lt.GREEN/ Red (+)

Brake pedal switch

Tach  Signal:

 

BLACK/ Green (AC)

Ignition coil

Parking Lights:

 

Orange / YELLOW (+)

Headlight switch

Headlights:

 

N/A

OEM Alarm  Disarm:

 

N/A

OEM Alarm  Arm:

 

N/A

Diesel  Glow Plug:

 

N/A

Clutch  Bypass Wire:

 

N/A

Notes:

 *This vehicle is equipped with Ford's PATS Anti-Theft security system. Use Universal Alarm Bypass Module part # 2x402 where X can be any number.

Ford

Focus

2003

Alarm and Keyless  Entry Wiring Colors and Notes

Function

 

Vehicle  Color

Location

Constant  +12 Volts:

 

Red (+)

Ignition switch harness

Starter  Kill:

 

Gray/Black (+)

Ignition switch harness

Ignition  +12 Volts:

 

GREEN/ YELLOW (+)

Ignition switch harness*

Dome  Lights/Superv:

 

BLACK/ Blue (-)

Low in the drivers kick panel area

OEM Horn:

 

BLACK/ Blue (-)

Steering column harness

Power  Lock:

 

BLACK/ Red (-)

Drivers kick panel

Power  Unlock:

 

BLACK / YELLOW (-)

Drivers kick panel

Trunk  Release:

 

BLACK / YELLOW (-)

Release switch or keyless entry module**

Alarm  Input Wire:

 

BLACK/ Blue (-)

Low in the drivers kick panel area

Notes:

**The keyless entry module is located behind the glove box to the right side of the vehicle.



Posted By: Elrockss
Date Posted: March 18, 2004 at 11:16 AM
boomer,
MANY THANKS!!
Let me know if I can ever return the favor!!posted_image

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elrock-SS



Posted By: boomer_106
Date Posted: March 18, 2004 at 5:55 PM
Your Welcome Elrock thanks for the offer. I may take you up on it someday.


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