SOHC 2003 Chassis Swapping in 2002 DOHC - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace

Go Back   Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum > Ford Focus Tech Discussions > Engine & Transmission Swap

Engine & Transmission Swap The place to chat about any engine and transmission swap.

Search This Forum | Image Search | Advanced Search    

LinkBack Thread Tools Display Modes
Old 05-04-2012, 03:34 PM   #1
Focus Jr. Enthusiast
Join Date: Apr 2012
Fan#: 97952
Location: Mckinney, TX
What I Drive: 2003 black focus se

Posts: 29
Points 298, Level 5
Points: 298, Level: 5 Points: 298, Level: 5 Points: 298, Level: 5
Level Up 96% Completed
Level up: 96% Level up: 96% Level up: 96%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 1 fastdeuce Good Standing Member
Buy-Sell-Trade Rating: (0)
SOHC 2003 Chassis Swapping in 2002 DOHC

I've searched quite a bit and have seen many of the swap writeups on this topic. The question I don't quite see a clear answer on is this.
-Is there a known month in the mfr'd date where the electrical wiring harness was changed? i.e. was it 5/2002 (any Focus mfr'd in 4/2002 or earlier will have a different wiring harness than 5/2002 and later?)

Also, specifically which wiring harnesses changed? Were the changes just to the ECU connections and the dash wire harness?

If I have a 2003 SE with SOHC/AT and want to swap from a donor Focus that is a 2002 ZTS sedan or ZX3 that is 4/2002 or older does it really matter much since I can swap all the wiring harnesses over from the donor vehicle? or is it a real pain to pull all the changed cables out?

fastdeuce is offline  
    Reply With Quote Quick reply to this message
Sponsored Links
Old 05-07-2012, 09:29 PM   #2
Focus Enthusiast
xShiFTx's Avatar
Join Date: Sep 2008
Fan#: 59110
Location: Albuquerque, NM
What I Drive: 02 Sangria Red SE

Posts: 94
FF Reputation: 5 xShiFTx Good Standing Member
Buy-Sell-Trade Rating: (2)
My Focus was manufactured 5/2002 and it is the older style connectors (00 to 02.5 style). The easiest way is to look at the connector that hooks to the engine harness -- if its rectangular then it is probably the 02.5+ and if it is more square then it is a 02.5-. If you have any doubt just post up a pic of it and I can tell you.

The wiring harness you change is the one that runs from the fuel pump, through the cabin up to the ECU, then through the firewall into the engine bay. It then connects to an engine bay wiring harness and also into the trans.

If you have an 03 SOHC I would use 02.5+ wiring throughout to make sure you don't run into any trouble. I'm pretty sure if you wanted to switch to 02.5- wiring you would need to pull the dash and do that wiring as well.
Zetec swapped
xShiFTx is offline  
    Reply With Quote Quick reply to this message

Bookmarks & Social Networks

Quick Reply

Register Now

In order to be able to post messages on the Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
What I Drive
Year, color, and model of your car. Example: 2003 Pitch Black ZX3
Your real name.
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 02:03 AM.

Copyright 2002-2015 All Rights Reserved : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Mazda CX-3, Audi S3, Mazda MX-5 Miata and Acura TLX. You can find all Ford Focus, Focus ST and Focus RS related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area. If you own other makes have a look at Challenger Hellcat Forum, Charger Hellcat Forum, Cadillac ATS-V Forum, Cadillac CTS-V Forum, Lexus RC-F Forum, Lexus GS-F Forum, Mercedes GLA Forum, Mercedes GLE Forum and Volvo XC90 Forum.


Search Engine Optimization by vBSEO 3.6.1