IneednSC

I need to know which exact body plugs need to be extended on 1jz non vvti harness for my 93 sc300, i have the plug lay out from wilbo666 i just need to know the which exact plugs. Either a pic or the name of the plug will work, also which gauge wire is best to use? I do not have a stock harness.

Kris9884

iTrader: (7)

Your best bet is to lay the GE harness next to the GTE harness, it'll be very obvious which ones you'll need to extend and how far. In short, if it goes to the firewall, it needs to be extended.

IneednSC

I dont have a ge harness so i am kind of in the dark.

Kris9884

iTrader: (7)

You don't have the stock sc300 harness that came with your car? Is it just a rolling chassis?

Edit: Just read your other posts and it is just the car, got it.

Ok so I would just do some searching since the wiring is literally all over the internet. Some say they need extended 15", some say 21", I say as long as it plugs in and its not taught, your good. I haven't extended my VVTi harness yet as I'm contemplating using Tweak but if I decide to pocket the $1400 and do it myself I'll take a ton of pictures for ya.

There's some good info in these threads:

https://www.clublexus.com/forums/bui...ld-thread.html
https://www.clublexus.com/forums/per...-in-sc300.html
http://www.supraforums.com/forum/sho...gte-Swap-Guide!!!!!

IneednSC

Correct. I bought the car with a 1jz swap already but sold everything for financial reasons so as of now its just the chassis. Guessing the extension will be a little easier sourcing a ge harness?

Kris9884

iTrader: (7)

Well sure but no biggie, the ES300 has the same ecu plugs and are a dime a dozen at salvage yards so you can go grab the plugs off of one of those if you need to.

IneednSC

Ok well i may have to source that then, but what plugs and how many need to be extended? I was told to leave all ecu plugs alone and just extend body plugs but no one really has gone into detail about which plugs to do it too.

Kris9884

iTrader: (7)

No one has gone into detail because it is literally that simple and its all over the internet. Go to google.com, type in "1jz extended harness" and you'll get 100's of pictures and forum posts.

Japji316

So you need to extend the body plugs, and need to repin a couple of them depending on what car the harness came out of and what year sc you have. You can get away without extending the ECU plugs and just have your 1jz ECU sitting a little higher under you passenger floor mat. You will not need to buy any plugs as the same ones work if your harness was out of a soarer(and i think chaser). If your harness came with a connector for the power steering solenoid and your sc has that and you want to keep it, you will need to extend that also.
I had seen a guide showing exactly what you needed to extend but can't remember where.

Japji316

Also extending the ECU plugs is not fun because there are shielded wires in some pins which are difficult to extend. It's not difficult to extend the body plugs and will save you alot of money because you won't need to buy a new harness.

Ali SC3

iTrader: (10)

the body plugs are the ones next to the ecu plugs.. that are not the ecu plugs. you have the ecu right? it should be pretty obvious.

there are only a couple shielded wires on the ecu connector, the knock wires, o2 wire(s), and the cam/crank wires.
Might not be a bad idea to extend the ecu plugs as well, but yeah its additional work.