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Old 02-03-2004, 05:16 PM   #1
scobaru
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Question SMJ questions

I'm labling all the wires and I'm confused about the SMJ. what is it and what does it do? I got the wiring diagrams and the page that tells me how to use it is missing or something. I've noticed that all of the stuff like rear fog, headlights, blinkers all connect. what do I do with the SMJ?!?!?
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Old 02-03-2004, 07:13 PM   #2
graff
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the smj is there to connect the front harness to the bulkhead
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Old 02-04-2004, 01:18 PM   #3
stimpy
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It is a junction between harness pieces. It is one massive connector. I kept mine so I didn't have to resolder all the wires together.

-Jon
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Old 02-04-2004, 10:58 PM   #4
mcgyver
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Well,

The SMJ does connect the front harness to the bulkhead harness, but it only contains the wires to the engine. the SMJ does Not contain any wires for headlights, blinkers, or rear defrost.

The SMJ part of the front harness is easily seperated from the whole front harness. Sorry for the confusion, but it's actually quite simple once it's unwraped. Now the whole bulkhead harness is a different story.

Like stimpy said, just keep it together so you don't have to solder the additional 30 wires. When I did mine originally, I cut-out the SMJ and shortened the harness by 6 feet! But it makes it a tighter fit and more work, so I suggest leaving the extra length in the bulkhead. Just a note: I leave the SMJ in all the conversions I do, I only have cut it out in mine and the second one I did.

Anyways, Good Luck!

-Adam
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Old 02-04-2004, 11:50 PM   #5
supermoose
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hey kaptin ispeed, would you happen to have a pinout for plug R1 off the SMJ for a 93-96 JDM wrx

i need to know what wires are what on the body harness so i can splice to my usdm 93 body. the fuel pump and the rear tailite and etc are off that R1


h
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Old 02-05-2004, 10:48 AM   #6
Zephyr
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I always cut out the SMJ on swaps I do only because I don't like having the extra wire in the car. I've been kinda lazy with my swap and have NOT removed it yet. It will be removed shortly though, no need to have an extra 4 feet of wire in the car.

Z
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Old 02-05-2004, 11:03 AM   #7
scobaru
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so your running with out the SMJ?
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Old 02-05-2004, 12:00 PM   #8
Zephyr
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Exactly, all it is there for is to make the harness into several moduals so that it's easier to run it through the car on assembly in Japan or to replace if something gets messed up on the harness.

Z
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Old 02-05-2004, 12:05 PM   #9
stimpy
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There are plenty of extra loops of wire in my car. Once it is summer and not 20 degrees like when I did my swap (outside), I will probably go through and clean some things up.

-Jon
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Old 02-05-2004, 05:40 PM   #10
scobaru
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hahah thats I'm doing my swap in 20 degree weather and some times in the negatives. but my boss also is a race car driver and said he'll let me do my swap in his shop which is hugeee its like 5000 square foot or something ilke that huge more than enough room its heated also all I need is to get the motor out of the clip asap and get usdm wiring diagram crap I gotta get on that
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Old 02-05-2004, 10:20 PM   #11
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supermoose: Sorry, I don't have any JDM diagrams. I haven't dealt with that early of a MY/WRX. Sounds like it could be a Ground.

scobaru: if you're asking me then Yes, mine is without the SMJ and so is the 2nd one I did. But the other 12 all have it and so will the next 4 that are lined up. It just simplifies the installation and there's nothing wrong with keeping the SMJ since it's that way in the WRX. Keep in mind that when you cut-out the SMJ you're cutting some sheilded wire for the fuel injectors. The nice part of retaining the SMJ is that it eliminates possible problems with engine controls. By that I mean if something didn't work properly when the installation is finished, you don't have to check all those wires from the ECU to the engine since they would have been untouched.

Just my $0.02
-Adam
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Old 02-08-2004, 01:48 AM   #12
scobaru
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I'm having my brother check out the subie dealership to find USA diagrams but Adam ((from I-speed)) were did you get your US wiring diagrams?
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Old 02-09-2004, 12:26 AM   #14
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It is in the FAQ. Best resource for me was http://techinfo.subaru.com.

-Jon
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