Welcome to the North American Subaru Impreza Owners Club Monday May 25, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Subaru Conversions

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 09-16-2003, 02:00 AM   #1
Scooby South
Subtly Outspoken
Moderator
 
Member#: 238
Join Date: Sep 1999
Chapter/Region: MWSOC
Location: 2013 STX National BRZ and a
Vehicle:
99 Ver6 Recreation
JDM Speedwagon 3 LSDs..:)

Talking Ok..Wiring Update....WRX to RS MY00

Well...I think this is the part that most people want to know about...so I will try to answer questions...if I can...Right now...My Engine harness is Done...just some small things to do...hook up the ABS sensors....Remount my windshield resevior...hook up the battery...Loom the main Harness...(Right now the harness is taped up ...about 6 inches apart...)...put the Down pipe on....put the Intercooler on...and extend my rear 02 Sensor Wires....also have to install the 02 sensor front and rear...(front Was damage in shipping..so I had to get a new one.. $159 bucks...but Oh well)....After that...the Engine side of it is Complete....

For the Wiring...Ok...
1...Have Both Wiring manuals for your car and the motor you are transplanting..

2...Ensure you get a COMPLETE harness for your swap...Get the Fuse box...the abs cords...the sensors....EVERYTHING...most likely you will end up cutting most of it out...but you will need to understand what You are Cutting out...(See next section)


3...Identify ALL Wires in the Each Harness....Lable them ..I would reccomend using 2 colors of tape when you flag the wires...one color RS and the other color WRX...that way you won't get the two confused...
you will need to know how to read a meter...to check continuity..thru circuits and what not...I can not EMPHASIZE this enough...PLEASE learn to read the schematics...its will tell you whats what in the zoo...Take a class....talk to a friend...but what ever you do...try your best to learn what it all means...

3...you will end up cutting about 5/8's of the WRX harness out and throwing it away...but only after you have identified what you want to throw out...

Some key things to keep in mind...All the Harness's in your car are labeled...
Example: B62...stands for Bulkhead Harness #62
Example: E22...stand for EnGINE harness #22
Example: C16...stands for CHassis harness #16...
so you have about 4 terms that you will become intimately familiar with
B= Bulkhead
C= Chassis
E= Engine
A=Airbag
D=Dash
and theres a few others also but you get the gist of it...

Some examples of what you will throw out...

a. The AIRBAG stuff...Usually marked in Yellow Loom or Yellow tape...GONE

b. Most of the DASH stuff will go away unless you plan to use all the Dash stuff from a WRX...

c. The SMJ....or MAIN JUNCTION will go away...or at least it did for me...

d. the Rear Window Defroster harness....GONE

e. The Main Fuse box and the Aux Fusebox....GONE

f. all the A/C stuff....GONE (unless your going to use the WRX compressor and such....I used my RS compressor and kept the RS wiring for it)

g. The Alternator harness...GONE

h. The Lighting harness....Gone

i. The power window/doorlock harness....GONE

These are some stuff that is cut out of the WRX harness...Theres alot more but you will need to make that determination according to your specific drivetrain swap...

Essensially...When you get done with all the Hacking...you will end up with pretty much a ENGINE only harness that will go back to the ECU..and tie into the Dash wiring of your current Vehicle...(mines a RS)...

Most of the wires are colorcoded the same as my RS...I would Say about 85%.....that match right up...But you need to identify them...anyways..so you know what your putting together...

4... Things that you will need to make sure your car will run...(besides motor obviously)

a. ECU from the car your taking the swap from.

b. Sensors...If the engine comes complete..then mostlikely you won't need any sensors from it..since its all on the motor anyways...but I will run down the list anyway...

# Camsensor
# Cranksensor
# Tumble Generator Valve Sensor
# MAP sensor
# Throttle postition Sensor
# Oil Sensor
# Coolant Temp Sensor
# Knock Sensor...

Those are just on the motor...Other sensors your will need for a USDM swap are:

# MAF sensor
# Front O2/ Air Fuel Sensor
# Rear 02 Sensor
# EGT Sensor
# Boost Solinoid
# Fuel Controller

Those are in the main Harness...

You heard me mention SMJ before..that where MOST everything Junctions into to...wiring wise....so if you don't need the power window harness..this is where you would start to cut it out from...Etc...etc...

My Engine Harness is in...so I am ALMOST Smelling the Roses...I still have to wire up The ECU which might be 20 wires at the most...then I have to put the dash back together...Hopefully It will start up on Wednesday...(cross your fingers)...

Lets see...Anything else I am forgetting.....

Oh yeah...There are 3 MAIN Plugs on the engine...1 on the passengers side...and 2 on the Drivers side...it is Essential to get the other part of these plugs to make a clean wiring job and to have it easy to disconnect in case you want to put that STi Block in.....This will allow you to get rid of the SMJ...

I routed my harness in the following manner...

there are two holes...on the firewall of my RS on the passenger side...Both were for different parts of the RS harness....there are Boots that go into these holes...USE THEM...I ended up using my stock RS Boot for the main harness...and the WRX boot for the sensor stuff...I will take pictures to show you guys what I am talking about...Anyways...thats about it..Hope this helps some of you.....I could get into more detail....but its pretty worthless unless your swapping a 02 WRX motor into a MY00 RS ..using the Stock RS Gear box...but I will help where I can...

Puc...will this work for ya..

Bill.....(Almost Boosted...)
* Registered users of the site do not see these ads.

Last edited by Scooby South; 09-16-2003 at 02:06 AM.
Scooby South is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 09-16-2003, 02:36 AM   #2
Ver.III
Scooby Specialist
 
Member#: 1185
Join Date: Mar 2000
Location: North of the border
Vehicle:
I flap my gums
and now I'm a specialist

Default

So in other words, you made a stand alone engine harness from the Wrx dash harness ? Hmmm, that sounds familular !!

Congrats dude !
Ver.III is offline   Reply With Quote
Old 09-17-2003, 02:57 PM   #3
crash
Scooby Specialist
 
Member#: 1440
Join Date: May 2000
Chapter/Region: South East
Location: Keeps Bumpers Fresher, Longer!
Vehicle:
05 LGT Wgn; 04 FXT
BDSM -- Birmingham, AL

Default Re: Ok..Wiring Update....WRX to RS MY00

Quote:
Originally posted by Scooby South
f. all the A/C stuff....GONE (unless your going to use the WRX compressor and such....I used my RS compressor and kept the RS wiring for it)
Bill.....(Almost Boosted...)
Completely OT, but are you saying that the only difference between the RS A/C Compressor and the WRX A/C compressor (00RS and 02WRX) is the plug for the sensors on the Compressor?

I may need to replace my A/C compressor, and there are a lot more WRX compressors out there....

-Nathan
crash is offline   Reply With Quote
Old 09-17-2003, 11:06 PM   #4
scobaru
Scooby Guru
 
Member#: 31345
Join Date: Dec 2002
Chapter/Region: MWSOC
Location: Wisconsin
Vehicle:
05 LGT, GC8, NA
blue, white, blue

Default

when did you start the project? how much of the wiring is stuff like power window's and what not? because I got a base model soo I'm not looking to do all of htat stuff did you do the whole swap your self good job give you prop's!
scobaru is offline   Reply With Quote
Old 09-20-2003, 12:17 AM   #5
Homemade WRX
Scooby Guru
 
Member#: 33782
Join Date: Mar 2003
Chapter/Region: MAIC
Location: 3MI Racing LLC
Vehicle:
96 bastard child
search FIRST, then PM!!!

Default

Wow it sounds so familiar. I wonder why? Oh yeah I did it and agree whole heartedly. The only problem is you will still end up with bugs in the system that will need to be fixed. But that is always expected.
Take it easy, Micah
glad to hear of your progress
Homemade WRX is offline   Reply With Quote
Old 09-20-2003, 02:11 AM   #6
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

thank you thank you thank you, i was wondering how to go about this, i am glad someone has taken the time as i am steps away from just doing the swap(i need to build the garage first). Since it's starting to seem easier and easier i can't thank you enough for making such an informative post

jeremy
HndaTch627 is offline   Reply With Quote
Old 09-20-2003, 02:15 AM   #7
RS22b
Scooby Guru
 
Member#: 5413
Join Date: Apr 2001
Chapter/Region: Tri-State
Location: The stages
Vehicle:
#15 2-Subaru
Rally Cars !!! Fiesta!

Default

yes, i am currently diong this swap.

I didnt recieve any of the other harnesses that you got, i only got the motor harness.

I was also missing about half of the sensors you mentioned above.

Didnt get an ECU...turbo mounting brackets...IC...or brackets for that either.

SO needless to say i have been running around with my head cutoff trying to complete all that i need for the conversion.

I just bought a TEC2 for it which will help alot with the wiring problems. And i also just purchased about $1300 in miscellanious to complete the motor, and that is at cost price.

I am quite unhappy with the way this swap has gone so far but i know from all of you guys that have this done already that it will be worth it in the end.

Looking to complete the project the end of this week when i get the last of the ordered parts in.

thanks for listening to my rant & sorry for the kinda OT.

Billyqua
rally driven................sometime soon
RS22b is offline   Reply With Quote
Old 09-20-2003, 08:55 AM   #8
Scooby South
Subtly Outspoken
Moderator
 
Member#: 238
Join Date: Sep 1999
Chapter/Region: MWSOC
Location: 2013 STX National BRZ and a
Vehicle:
99 Ver6 Recreation
JDM Speedwagon 3 LSDs..:)

Default Re: Re: Ok..Wiring Update....WRX to RS MY00

Quote:
Originally posted by crash


Completely OT, but are you saying that the only difference between the RS A/C Compressor and the WRX A/C compressor (00RS and 02WRX) is the plug for the sensors on the Compressor?

I may need to replace my A/C compressor, and there are a lot more WRX compressors out there....

-Nathan
not unless you change the AC lines out also...I used the RS Compressor just so I wouldn't have to re do all the AC lines....I did have to trim some of the drivers side fuel rail bracket to accomadate the RS compressor...but not to where its unsafe....


Quote:
Originally posted by scobaru
when did you start the project? how much of the wiring is stuff like power window's and what not? because I got a base model soo I'm not looking to do all of htat stuff did you do the whole swap your self good job give you prop's!
I started the 10th of Aug...and I have done all the work myself...I have some friends thats helped along the way....which I highly reccomend...I work at a dealership...so getting a engine hoist wasn't a big deal....to physically put the engine in....had a tech freind help with that....had another friend with a car trailer tow my car home....anyways...you get the picture.. hope it work out well for you...

Quote:
Originally posted by Homemade WRX
Wow it sounds so familiar. I wonder why? Oh yeah I did it and agree whole heartedly. The only problem is you will still end up with bugs in the system that will need to be fixed. But that is always expected.
Take it easy, Micah
glad to hear of your progress
Definately agree here....ALWAYS expect the unexpected...I will get the bugs out of it...but its just time comsuming...


Quote:
Originally posted by HndaTch627
thank you thank you thank you, i was wondering how to go about this, i am glad someone has taken the time as i am steps away from just doing the swap(i need to build the garage first). Since it's starting to seem easier and easier i can't thank you enough for making such an informative post

jeremy
Your welcome....I wish someone would have had this available when I did mine..it would have made it alot easier...but its here now..

Quote:
Originally posted by RS22b
yes, i am currently diong this swap.

I didnt recieve any of the other harnesses that you got, i only got the motor harness.

I was also missing about half of the sensors you mentioned above.

Didnt get an ECU...turbo mounting brackets...IC...or brackets for that either.

SO needless to say i have been running around with my head cutoff trying to complete all that i need for the conversion.

I just bought a TEC2 for it which will help alot with the wiring problems. And i also just purchased about $1300 in miscellanious to complete the motor, and that is at cost price.

I am quite unhappy with the way this swap has gone so far but i know from all of you guys that have this done already that it will be worth it in the end.

Looking to complete the project the end of this week when i get the last of the ordered parts in.

thanks for listening to my rant & sorry for the kinda OT.

Billyqua
rally driven................sometime soon
Man I feel for ya....I hope you get it going....if you have a friend with a WRX.....use it as a reference car....I can't count how many times I looked at my friends WRX to make sure I was understanding what the schematic was telling me...it made a huge difference...like which direction the harness goes....which relay the fuse box uses...etc....If you need some of those parts..I have some extra stuff laying around.....like I/C, turbo brackets, uppipe, just give me a shout....

Bill
Scooby South is offline   Reply With Quote
Old 09-20-2003, 11:35 AM   #9
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default Re: Re: Re: Ok..Wiring Update....WRX to RS MY00

Quote:
Originally posted by Scooby South
Your welcome....I wish someone would have had this available when I did mine..it would have made it alot easier...but its here now..
If i would have had the money and the time(or even a local with the guts) i would have put it down for ya

we'll have to work on a step by step procedure. I like the way you did yours because it's clean, not totally hacked and everything plugs right in
HndaTch627 is offline   Reply With Quote
Old 09-20-2003, 02:25 PM   #10
Crawford/I-Speed
Vendor
 
Member#: 12347
Join Date: Nov 2001
Chapter/Region: SCIC
Location: Oceanside, CA
Vehicle:
ECU ReProgramming
Dynapack AWD Dyno

Default

Scooby South - That's very good / accurate information. I am always pleased to see other people taking on this daunting task and doing it the correct clean way. I hope your start up goes without a hitch

Re SMJ: Some people choose to cut it out. You can still use it and save yourself some soldering. You just have to find the sweet spot, under the passenger side airbag, to stash that box of wires.

Re AC systems: PITA! Wiring it in is different in each MY impreza.

BTW: Have you kept track of your time/hours invested? I am always curious to see how long it takes other people to do it the first time.

Chris
I-Speed USA
cescamilla@i-speedusa.com
Crawford/I-Speed is offline   Reply With Quote
Old 09-22-2003, 04:31 PM   #11
stimpy
Homicidal Maniac
Moderator
 
Member#: 1612
Join Date: Jun 2000
Location: Austin, TX
Vehicle:
2008 STI

Default

I will also be doing something like this. However, my drivetrain arrived incomplete so I am still waiting for parts before the install goes down. In the interm, I am hacking the wiring harness just as Scooby South described (No, I'm not doing it because he has said, this is the way I thought was best just as he did). Though the information is very good, once you start digging around in the wiring, almost all of it becomes obvious.

My other problem is that my car is my daily driver so I won't have the car freed up until Christmas vacation. I love mechanicking in the snow I've done cams in my RS in the snow and set valve lash in two different instances in the snow. It's time to take it up a notch and do an entire engine swap in the snow, yay.

Unfortunately, it seems that more engine swaps go bad than those that go well. Mine hasn't gone completely bad yet, but it is WAY behind schedule due to missing parts I still haven't received.

-Jon
stimpy is offline   Reply With Quote
Old 09-29-2003, 01:16 AM   #12
motorswapsleeper
Scooby Specialist
 
Member#: 38946
Join Date: Jun 2003
Location: yay...IRAQ...yay...
Vehicle:
199? 6 diff ones
bag o' skittles

Default

Sorry I'm a little slow on this...so you have BOTH ecu's in the car now? How did you do the power wiring for that?
motorswapsleeper is offline   Reply With Quote
Old 09-29-2003, 06:46 AM   #13
Scooby South
Subtly Outspoken
Moderator
 
Member#: 238
Join Date: Sep 1999
Chapter/Region: MWSOC
Location: 2013 STX National BRZ and a
Vehicle:
99 Ver6 Recreation
JDM Speedwagon 3 LSDs..:)

Default

no....just the WRX one...I still have the RS wiring tho...should hack it out one of these days...

Bill
Scooby South is offline   Reply With Quote
Old 03-22-2005, 12:00 PM   #14
Randoramma
Scooby Newbie
 
Member#: 60649
Join Date: Apr 2004
Chapter/Region: NWIC
Location: seattle
Vehicle:
00RS EJ205 swap

Thumbs up Digging throught the archives

This is a great thread. I am about to undertake the MY00 to WRX swap myself. I have a couple of questions thought.
1. My motor didnt come with AC (bracket nor compressor), PS (same), or Alt (same). Is it possible to use all of this from my MY00 EJ25? It looks like it is with the A/C and Alt. For the PS, it looks like I might need a new pully?

2. I think I will be able to get the bulkhead harness, and I have the engine harness, and ECU, and I am trying to get the front harness (all for WRX), will it be eaiser to just pull these harnesses out of my MY00, and swap in the new WRX harnesses. I have been thinking of sorcing some plugs from JYD's so I wont have to tear up my MY00 harness. ie use the WRX plugs and finding mates and sodder to components in the car. I dont think I want to do this with junctions, but perhaps with the front harness, ect. Your thoughts?

3. I havent searched on this yet, but with the MY00 harness that will stay in the car, are there any plugs that will mate up directly with the MY02 WRX harness? << Just plug & play? Or are they so different from year to year that this I will have to just find out for myself? I know its a big task. I have wired up a harness before for an 85 toyota, I know its a little different, but I actually think this will be eaiser as before it was JDM motor, and I had no diagrams for it. Now I have all that info!

Great info, and great thread.

Randy
Randoramma is offline   Reply With Quote
Old 03-22-2005, 01:34 PM   #15
austenf740
Scooby Specialist
 
Member#: 21519
Join Date: Jul 2002
Location: Austin,TX
Vehicle:
02 WRB WRX
98 RS

Default

Quote:
Originally Posted by Randoramma
2. I think I will be able to get the bulkhead harness, and I have the engine harness, and ECU, and I am trying to get the front harness (all for WRX), will it be eaiser to just pull these harnesses out of my MY00, and swap in the new WRX harnesses. I have been thinking of sorcing some plugs from JYD's so I wont have to tear up my MY00 harness. ie use the WRX plugs and finding mates and sodder to components in the car. I dont think I want to do this with junctions, but perhaps with the front harness, ect. Your thoughts?
Randy
I have been wondering this too. Can i replace the MY98rs bulkhead with a wrx bulkhead and splice the rs components into a complete wrx harness instead of splicing the wrx harness into the rs? I am also using a wrx dash so maybe this would work but would i need all of the wrx harness though or just the bulkhead and engine harness?
austenf740 is offline   Reply With Quote
Old 03-22-2005, 04:21 PM   #16
latinskllz
Scooby Specialist
 
Member#: 3461
Join Date: Jan 2001
Chapter/Region: South East
Location: orlando, fl, USA
Vehicle:
1998 BMW M3 Coupe
Estoril Bleau

Default

Quote:
Originally Posted by austenf740
I have been wondering this too. Can i replace the MY98rs bulkhead with a wrx bulkhead and splice the rs components into a complete wrx harness instead of splicing the wrx harness into the rs? I am also using a wrx dash so maybe this would work but would i need all of the wrx harness though or just the bulkhead and engine harness?
I just takes up a lot of man hours to replace everything, plus some pins are different as well such as ABS/HVAC related. etc.
latinskllz is offline   Reply With Quote
Old 03-22-2005, 09:40 PM   #17
Scooby South
Subtly Outspoken
Moderator
 
Member#: 238
Join Date: Sep 1999
Chapter/Region: MWSOC
Location: 2013 STX National BRZ and a
Vehicle:
99 Ver6 Recreation
JDM Speedwagon 3 LSDs..:)

Default

Quote:
Originally Posted by Randoramma
This is a great thread. I am about to undertake the MY00 to WRX swap myself. I have a couple of questions thought.
1. My motor didnt come with AC (bracket nor compressor), PS (same), or Alt (same). Is it possible to use all of this from my MY00 EJ25? It looks like it is with the A/C and Alt. For the PS, it looks like I might need a new pully?

Randy
First off I am glad this got brought back.....thanks...

-Use your AC compressor from the RS...no problem..The bracket from the RS is a little tight...but it works...
-The Alternator will work also...from the RS...with no problem

-The PS is a problem...you need the WRX pump, Resevoir and lines from a WRX...otherwise it won't work....Sorry......

Quote:
Originally Posted by Randoramma
2. I think I will be able to get the bulkhead harness, and I have the engine harness, and ECU, and I am trying to get the front harness (all for WRX), will it be eaiser to just pull these harnesses out of my MY00, and swap in the new WRX harnesses. I have been thinking of sorcing some plugs from JYD's so I wont have to tear up my MY00 harness. ie use the WRX plugs and finding mates and sodder to components in the car. I dont think I want to do this with junctions, but perhaps with the front harness, ect. Your thoughts?
No...There is going to be certain things you will need off the RS harness...like the Dash, Sunroof, Taillights etc...all those things are on the RS harness so you will have to have all that for the basic RS stuff to work...You could switch out harnehsses. but you would have to pull the whole thing...ABS, Airbag, lighting and all....Not worth it in my book...Its easier to understand what you will end up with...which is essentially a Engine Harness only to the ECU...and tieing the RS harness in with the essintials...for the lighting sunroof etc...


Quote:
Originally Posted by Randoramma

3. I havent searched on this yet, but with the MY00 harness that will stay in the car, are there any plugs that will mate up directly with the MY02 WRX harness? << Just plug & play? Or are they so different from year to year that this I will have to just find out for myself? I know its a big task. I have wired up a harness before for an 85 toyota, I know its a little different, but I actually think this will be eaiser as before it was JDM motor, and I had no diagrams for it. Now I have all that info!

Great info, and great thread.

Randy
None are the same....different pinouts and shapes.. sorry...

Bill
Scooby South is offline   Reply With Quote
Old 03-22-2005, 09:48 PM   #18
Scooby South
Subtly Outspoken
Moderator
 
Member#: 238
Join Date: Sep 1999
Chapter/Region: MWSOC
Location: 2013 STX National BRZ and a
Vehicle:
99 Ver6 Recreation
JDM Speedwagon 3 LSDs..:)

Default

Quote:
Originally Posted by austenf740
I have been wondering this too. Can i replace the MY98rs bulkhead with a wrx bulkhead and splice the rs components into a complete wrx harness instead of splicing the wrx harness into the rs? I am also using a wrx dash so maybe this would work but would i need all of the wrx harness though or just the bulkhead and engine harness?
As latinskllz said...You would loose all the funtionality of the RS harness, sunroof, lights, etc....otherwise...you still end up with a Engine only harness...just with the dash section added...

Bill
Scooby South is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Red Ground Wire Kit WRX STi RS etc. WRXerist Engine/Power/Exhaust 1 04-08-2008 08:26 PM
What is the Sti to WRX to RS to OBS to plain Impreza ratio? GreasyJoe General Community 6 03-10-2008 06:59 PM
WRX to RS Front Rotor Swap Ryan24 Brakes, Steering & Suspension 28 03-20-2003 08:16 AM
WRX to RS engine swap exhaust questions racer25rs Normally Aspirated with bolt-on Forced Induction Powertrain 1 05-20-2002 02:04 PM
Brake swap, WRX to RS? jagcars26 Brakes, Steering & Suspension 5 04-07-2002 09:59 PM


All times are GMT -4. The time now is 08:13 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2015, North American Subaru Impreza Owners Club, Inc.