Wiring harness Q

fragment · 05-02-2005, 03:00 PM

Starting on a swap (helping out another member) '03 WRX driveline into '99RS coupe. He bought the driveline with the bulkhead harness, but its missing the SMJ to drivers side 20pin and 16 pin engine connectors (aka Very Important Connectors).

Is that part of a larger harness, or just the 36 or so wires for the engine? I went to the dealer to ask for a price on that harness, and they showed me a drawing that didn't look quite right, and was worth $1,100 CDN!

Anyone know where to source a used one?

I don't think we should proceed until we have that bit of harness...

Also, when merging the harnesses, does the entire WRX SMJ go into the RS?

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Randoramma · 05-02-2005, 03:09 PM

I know some people have nixed the SMJ and just soddered all the wires together? You could try that? Good luck finding one though, alot of people want the harnesses on both sides of the swap.

Randy

PHATsuby · 05-03-2005, 03:32 AM

i have also heard it is easiest to just direct wire instead of using the SMJ.

Fragment can you send me the 99 diagram so i can check on those plugs if they are there or not?? i need the Engine Electrical System pdf file or something equivalent. I am sure you have looked but i want to double check

Ben

TheKryptKeeper · 05-03-2005, 03:34 AM

A buddy did a very similar swap, it was easier to just modify the stock 2.5RS harness.

subbyspeed · 05-03-2005, 09:01 AM

we are currently working a way to use the 2.5 rs connectors, and just re-pin them, to make it all hunky-dory. Pain the butt? sure, but it is either way.

fragment · 05-03-2005, 09:17 AM

Ben, sending you the diagram.

I've looked through the diagrams, and it looks like the two connectors are physically the same but the drawings aren't alway right. I'll feel better when I see the RS connectors in person. I'm not afraid to splice wires, my concern is more along the lines of injecting errors needlessly.

I thought I had read most detailed threads but I never saw anyone say they cut and spliced around the SMJ. Maybe I'm reading too fast.

Thanks for the responses.

xcntrk75 · 05-03-2005, 10:09 AM

Sounds like you’re missing the “front wiring harness” which includes the other half of the SMJ which carries into the engine compartment including the ‘VIC’. I think you’ll have a very hard time finding this portion of another donor harness only, likely you would have to get a whole other harness which includes this piece.

Possibly wiring around it may be a better alternative especially if the driver-side engine connections (black and brown plugs behind batt) can be achieved by using some of the existing (and compatible) RS plugs already in place.

Good luck…

PHATsuby · 05-03-2005, 05:28 PM

yea, they have the bulkhead. i think they have the other end of the SMJ from what i understand, but just the plugs were cut off the ends.

Ben

fragment · 05-03-2005, 08:40 PM

Quote:

Originally Posted by PHATsuby

yea, they have the bulkhead. i think they have the other end of the SMJ from what i understand, but just the plugs were cut off the ends.

Ben

Actually, we only have the bulkhead side of the SMJ. Looks like I'll be cutting the SMJ off and splicing as required. Time to go shopping for some more heat shrink...

Randoramma · 05-04-2005, 12:05 PM

I'm really glad for all the posts in this thread, it has given me the confidence that if I cant locate a front harness for cheap, I can still go through with the swap with only the bulkhead and engine harnesses.

Randy

subbyspeed · 05-04-2005, 12:29 PM

Thats what i'm doing. no front harness here. Just going to utilize the 2.5rs section as much as possible, and add in wires where need be. And switch the engine connectors over to the 2.5rs ones.. They 46 pinouts on the wrx and 46 on the 2.5..

05-02-2005, 03:00 PM	#1
fragment Scooby Specialist Member#: 8050 Join Date: Jul 2001 Chapter/Region: W. Canada Location: Bugeye EJ207 - T3T04S Vehicle: 2007 Wagon VF36	Wiring harness Q Starting on a swap (helping out another member) '03 WRX driveline into '99RS coupe. He bought the driveline with the bulkhead harness, but its missing the SMJ to drivers side 20pin and 16 pin engine connectors (aka Very Important Connectors). Is that part of a larger harness, or just the 36 or so wires for the engine? I went to the dealer to ask for a price on that harness, and they showed me a drawing that didn't look quite right, and was worth $1,100 CDN! Anyone know where to source a used one? I don't think we should proceed until we have that bit of harness... Also, when merging the harnesses, does the entire WRX SMJ go into the RS? * Registered users of the site do not see these ads.

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05-02-2005, 03:09 PM	#2
Randoramma Scooby Newbie Member#: 60649 Join Date: Apr 2004 Chapter/Region: NWIC Location: seattle Vehicle: 00RS EJ205 swap	I know some people have nixed the SMJ and just soddered all the wires together? You could try that? Good luck finding one though, alot of people want the harnesses on both sides of the swap. Randy

05-03-2005, 03:32 AM	#3
PHATsuby Scooby Guru Member#: 13617 Join Date: Dec 2001 Chapter/Region: MWSOC Location: MN Vehicle: 2001 Legacy GT back to stock is a project too	i have also heard it is easiest to just direct wire instead of using the SMJ. Fragment can you send me the 99 diagram so i can check on those plugs if they are there or not?? i need the Engine Electrical System pdf file or something equivalent. I am sure you have looked but i want to double check Ben

05-03-2005, 03:34 AM	#4
TheKryptKeeper Scooby Newbie Member#: 80818 Join Date: Feb 2005 Location: New Mexico Vehicle: 1994 Impreza L wagon White	A buddy did a very similar swap, it was easier to just modify the stock 2.5RS harness.

05-03-2005, 09:01 AM	#5
subbyspeed Scooby Specialist Member#: 16274 Join Date: Mar 2002 Chapter/Region: MWSOC Location: Columbus,OH Vehicle: 2001 GM6 2.0L vf30 e30 black/rust	we are currently working a way to use the 2.5 rs connectors, and just re-pin them, to make it all hunky-dory. Pain the butt? sure, but it is either way.

05-03-2005, 09:17 AM	#6
fragment Scooby Specialist Member#: 8050 Join Date: Jul 2001 Chapter/Region: W. Canada Location: Bugeye EJ207 - T3T04S Vehicle: 2007 Wagon VF36	Ben, sending you the diagram. I've looked through the diagrams, and it looks like the two connectors are physically the same but the drawings aren't alway right. I'll feel better when I see the RS connectors in person. I'm not afraid to splice wires, my concern is more along the lines of injecting errors needlessly. I thought I had read most detailed threads but I never saw anyone say they cut and spliced around the SMJ. Maybe I'm reading too fast. Thanks for the responses.

05-03-2005, 10:09 AM	#7
xcntrk75 Scooby Specialist Member#: 60224 Join Date: Apr 2004 Chapter/Region: MAIC Location: NOVA Vehicle: 2008 FXT Sports 2.5 Dark Grey Metallic	Sounds like you’re missing the “front wiring harness” which includes the other half of the SMJ which carries into the engine compartment including the ‘VIC’. I think you’ll have a very hard time finding this portion of another donor harness only, likely you would have to get a whole other harness which includes this piece. Possibly wiring around it may be a better alternative especially if the driver-side engine connections (black and brown plugs behind batt) can be achieved by using some of the existing (and compatible) RS plugs already in place. Good luck…

05-03-2005, 05:28 PM	#8
PHATsuby Scooby Guru Member#: 13617 Join Date: Dec 2001 Chapter/Region: MWSOC Location: MN Vehicle: 2001 Legacy GT back to stock is a project too	yea, they have the bulkhead. i think they have the other end of the SMJ from what i understand, but just the plugs were cut off the ends. Ben

05-04-2005, 12:05 PM	#10
Randoramma Scooby Newbie Member#: 60649 Join Date: Apr 2004 Chapter/Region: NWIC Location: seattle Vehicle: 00RS EJ205 swap	I'm really glad for all the posts in this thread, it has given me the confidence that if I cant locate a front harness for cheap, I can still go through with the swap with only the bulkhead and engine harnesses. Randy

05-04-2005, 12:29 PM	#11
subbyspeed Scooby Specialist Member#: 16274 Join Date: Mar 2002 Chapter/Region: MWSOC Location: Columbus,OH Vehicle: 2001 GM6 2.0L vf30 e30 black/rust	Thats what i'm doing. no front harness here. Just going to utilize the 2.5rs section as much as possible, and add in wires where need be. And switch the engine connectors over to the 2.5rs ones.. They 46 pinouts on the wrx and 46 on the 2.5..