3sgte engine swap wiring harness, how to modify Options

[alex3sgte]

Im finish my 3sgte engine swap intomy 1994 celica at200 with 7afe engine but,I have one very,very,very big problem with the engine wiring harness.I need to know wich engine wiring harness i have to use or wich one I need,I do the swap with the st185 3sgte engine but need help to know if I have to use the wiring harness from the 1853sgte or the one from st2053sgte.WICH ONE.please anybody to help me,let me know

[DG_Performance]

if you used the st185 engine for the swap then you will need the st185 harness to be wired in with your stock harness (to make a hybrid mix harness). you cant just use one or the other. it wont work like that. you might be able to use almost the whole 3s harness with its stock fuse box and try to tap all you interior gauges and interior stuff into it but i dont know that for sure. it sounds like it would be the easiest way but ?????????
i put a post up in the wireing section of this site to try to help all the swapers. it pretty much tells you what wire is for what on the 3s harness. so if you know how to read the diagram and you can figure out in your car what wire is for what you can just spice into them that way. (i myself would not want to do any guessing)
i hope you did not drop the engine in you car yet!
if you already put the 3s engine into your car..... you are going to have a fun time trying to get a harness to fit onto the engine like it is supposed to!
i just did my hybrid harness 2 weeks ago and it is not hard , but it takes time and you have to be very careful not to get wires mixed up. i bought a diagram off of mike(the guy that does all the wireing swaps) that shows how to do the harness, but for what i paid for it i should have just spent the extra $ and got him do the harness. and if you are not the best person at wireing i will warn you away from trying to do it yourself.

dg

[Digndoug]

[presure2]

mike dont "just splice some wires" mike is studying to become and electrical engineer, knows these harnesses VERY well...when he's done the harness looks FACTORY...the guy does EXTREMELY good work, i'd gladly be giving him my money when i do my swap, cause i dont even wanna take the chance of messing somthing up..then having to fish throu the harness looking for that one loose connection..no thanks...lol
i think that if your VERY confident in your wireing skills, excellent at soldering, study the HELL outta the wiring diagrams, and be EXTREMELY carefull, it can be done right by some...but like i said, i know my limits, certain things are just better left to someone who KNOWS what they are doing

[lagos]

wiring seems to be a big gray area because there is so little info about it. we really need someone to do a basic write up that tells you what connectors you will need to take off from the 5sfe harness and attach to the 3sgte one.

[DG_Performance]

From what i know there is a 3sge adapter harness that you can get to make it a 3sgte. (all plug and play). i think i even noticed it in the parts section of this site b4? not sure though. $400 does seem like a lot to pay for wireing. but if it comes back as pressure 2 says ....then it is worth it. i did my own harness with the diagrams that mike made. (i had to pay for the diagrams and promise not to resell it) Now, i found some things on my harness that were different than what mike had in the diagrams... and had to figure out another way to wire it up. Plus i took the alternator wires and all mian wires from my 5s harness and completely re-ran them in the 3s harness to avoid splicing major power wires!!!!
If any of you guys plan on doing it yourself it will take you 3 days to do it! full weekend job.
I am not the kind of person to give away all of mikes secrets for wireing, but if you guys have problems i will try to help you figure it out!
DG

[Drocay]

u can find the 3sge adapter on nopi. By the way when i was helping my friend with his sr20 swap he got a splicing(extending) tool from his uncle that worked as a electrician for an airport all u had to do was take the two ends u were trying to connect stick them in the tool add this little yellow thing press the handle and all your wires were connect just as good as doing them by hand and sodering. I have been looking for this tool everywere online and i just can't find it and when i asked my friends uncle he said that the thing cost like 400 bucks and it was owned by the airport. Do any of u guys were i could get one of these things.

THanx.

This post has been edited by Drocay: Apr 24, 2004 - 1:31 PM

[Digndoug]

[DG_Performance]

There is nothing 7a to 3s at all............
it all has to be custom hand made my friend.
DG

[Digndoug]

[Digndoug]

ok, what exactly are you splicing togeather, i mean i have the ecu, so what else am i slpice for whats in my engine or anything?????? thanks

[DG_Performance]

I am not sure what you are saying?
When you ask a clear question ....exactly what you want to know
I can give you a good answer
dg

[Chrobis]

you should just send both harnesses to mike (qatar) and he will do it for you. A 205 harness could work, but chances are some of the ECU pins would be different, there is different technology on a 205, like the little thing of missing an AFM box. And not to mention the harness would need to be lengthened about 3 feet.

Mike (qatar) does all this for $400-$500 and interfaces it with all the other systems on the car.