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Old 05-02-2005, 03:00 PM   #1
fragment
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Location: Bugeye EJ207 - T3T04S
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2007 Wagon VF36

Default 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?
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Old 05-02-2005, 03:09 PM   #2
Randoramma
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00RS EJ205 swap

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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
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Old 05-03-2005, 03:32 AM   #3
PHATsuby
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to stock is a project too

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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
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Old 05-03-2005, 03:34 AM   #4
TheKryptKeeper
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A buddy did a very similar swap, it was easier to just modify the stock 2.5RS harness.
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Old 05-03-2005, 09:01 AM   #5
subbyspeed
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e30 black/rust

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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.
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Old 05-03-2005, 09:17 AM   #6
fragment
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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.
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Old 05-03-2005, 10:09 AM   #7
xcntrk75
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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…
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Old 05-03-2005, 05:28 PM   #8
PHATsuby
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to stock is a project too

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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
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Old 05-03-2005, 08:40 PM   #9
fragment
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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...
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Old 05-04-2005, 12:05 PM   #10
Randoramma
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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
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Old 05-04-2005, 12:29 PM   #11
subbyspeed
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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..
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