 ECU Wiring Harness Question, All you 3s swapped STs.. |
 Oct 30, 2004 - 12:22 AM
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 Enthusiast  Joined Feb 27, '04 From Illinois Currently Offline Reputation: 1 (100%)  |
I recently just bought NEVERSTOP's monster 3SGTE. I need to know what all needs to be done to the Wiring harness for it to work in my ST. It is my understanding that all of the wires need to be extended by 33 inches or so... But is that all that needs to be done? Also, I think that some of the plugs are different in my 7AFE ECU and may need to be changed.
Can anyone get me some type of wiring schematics and tell me what all needs to be done to get the ECU to work in my swap? Thanks alot! Yota --------------------  |
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Replies
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Oct 30, 2004 - 1:04 AM
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 Enthusiast Joined May 15, '03 From Aurora IL Currently Offline Reputation: 0 (0%) |
7afe ecu won't work with the swap.. some people wind up drilling a hole in their firewall, feeding the wires thru, bypassing the need to extend the wirees. you still may have to do some extending, i'm not entirely sure about that. i have some links i can post.. let me go dig through my bookmarks.. you can page me on AIM if you need them immediately. |
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Oct 30, 2004 - 2:39 AM
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Enthusiast Joined Jun 27, '04 From ohio Currently Offline Reputation: 7 (100%) |
send me the links too thanks lance
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Oct 30, 2004 - 7:41 AM
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 Enthusiast Joined Aug 31, '02 From Philadelphia, PA Currently Offline Reputation: 8 (100%) |
do you have an uncut ST185 harness with the engine?
-------------------- 15PSI - 30MPG - Megasquirt Tuned
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Oct 30, 2004 - 9:02 PM
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Enthusiast Joined Feb 27, '04 From Illinois Currently Offline Reputation: 1 (100%) |
the 185 harness is cut.
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Oct 30, 2004 - 9:19 PM
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 Enthusiast Joined Dec 27, '03 From Nor Cal Currently Offline Reputation: 0 (0%) |
You'll have to rebuild it -------------------- "It's ok to be naked girl... I'm an artist!"
1995 AT200 Celica ST: stocked out daily driver... 1984 AE86 Corolla GT-SR5: silvertop 20V 4AGE project car jacked up with goodies... 1991 SW2x MR2 n/a: bare bones hardtop model soon to be... |
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Oct 31, 2004 - 12:29 PM
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Enthusiast Joined Feb 27, '04 From Illinois Currently Offline Reputation: 1 (100%) |
Meaning what...? Extending each wire and every wire?
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Oct 31, 2004 - 12:52 PM
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 Moderator Joined Oct 1, '02 From fall river, ma Currently Offline Reputation: 13 (100%) |
your in for ALOT of work man,...if the harness is cut, your gonna have to rewire it..
 good luck, man
-------------------- Former Team 5SFTE pro member ;)
 13.6@108MPH, 5SFTE Powered |
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Oct 31, 2004 - 5:08 PM
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 Enthusiast Joined Aug 20, '03 From Annapolis, Md Currently Offline Reputation: 5 (100%) |
did any one ever get close to making that how-to for the wire swap??
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Oct 31, 2004 - 10:22 PM
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Enthusiast Joined Aug 14, '04 From Toledo, Ohio Currently Offline Reputation: 0 (0%) |
i wish...im about a week from starting the wiring for my swap...maybe i can get some info together while it's being done...but im not promising anything |
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Nov 1, 2004 - 1:24 AM
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Enthusiast Joined Feb 27, '04 From Illinois Currently Offline Reputation: 1 (100%) |
Rewire..meaning what? Is it just a matter of extending the wires, and finding out where they plug into?
If thats the case, there should be wiring schematics from Toyota that I could get. Then it would only mean me figuring out what wire goes where, extending it to plugging it in. Right? -------------------- |
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Nov 1, 2004 - 1:39 AM
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 Enthusiast Joined Dec 2, '02 From Portland, Oregon Currently Offline Reputation: 0 (0%) |
you fail to see that you'll have to seperate each individual wire and find out where it's coming from, extend enough to reach the ecu, and then plug into the right plug in the ecu. That may not sound like much but that is ALOT of work.
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Nov 1, 2004 - 1:47 AM
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Enthusiast Joined Feb 27, '04 From Illinois Currently Offline Reputation: 1 (100%) |
I have a friend who swapped an sr20 into his 240sx. He just showed me what he had to do with his wiring harness.
He got these wiring schematics that told him what each wire was. He then extended it to whatever length he needed and plugged it into the correct corresponding plug. -------------------- |
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Nov 1, 2004 - 2:20 AM
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Enthusiast Joined Dec 27, '03 From Nor Cal Currently Offline Reputation: 0 (0%) |
Even with a how-to with detailed pictures and diagrams... building a wire harness is still gonna be beyond most who don't have a lot of experience.
Toyota's aren't as easy as Nissans either... but as far as building the harness goes... Doge pretty much explains the basic process. it's all about having diagrams and knowing what wires do what and what is needed for the engine to work. -------------------- "It's ok to be naked girl... I'm an artist!"
1995 AT200 Celica ST: stocked out daily driver... 1984 AE86 Corolla GT-SR5: silvertop 20V 4AGE project car jacked up with goodies... 1991 SW2x MR2 n/a: bare bones hardtop model soon to be... |
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Nov 1, 2004 - 8:35 AM
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Enthusiast Joined Aug 31, '02 From Philadelphia, PA Currently Offline Reputation: 8 (100%) |
you have to rewire the harness to plug into your stock fuse box, or you can use dual fuse boxes like doge.
on the interrior, you have to rewire the 3rd ecu plug and 3 interrior plugs. then add in a fuel pump relay from your st185. after that, you can extend the harness or cut a new hole in your firewall directly to the ecu. -------------------- 15PSI - 30MPG - Megasquirt Tuned
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Nov 1, 2004 - 3:41 PM
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Enthusiast Joined Feb 27, '04 From Illinois Currently Offline Reputation: 1 (100%) |
and thats it?
What would I have to do if I was able to come across an uncut 185 harness? Is there anywhere you can go to purchase one? -------------------- |
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Nov 1, 2004 - 9:24 PM
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Enthusiast Joined Aug 31, '02 From Philadelphia, PA Currently Offline Reputation: 8 (100%) |
what i just said. you also need and AFM, turbo pressure sensor, resistor packs, ignitor, coil, etc...hope u got those too. this is why people say to just get a clip. it will probably take forever to source all these parts. keep an eye out on ebay! -------------------- 15PSI - 30MPG - Megasquirt Tuned
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Nov 2, 2004 - 2:33 PM
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Enthusiast Joined Feb 27, '04 From Illinois Currently Offline Reputation: 1 (100%) |
I already have those parts.
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