Looks like EB1 connector.
The EFI relay, which is activated by the Toyota ECM, provides power to that wire. I didn't use it for the swap, but one could probably repurpose that relay....
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Looks like EB1 connector.
The EFI relay, which is activated by the Toyota ECM, provides power to that wire. I didn't use it for the swap, but one could probably repurpose that relay....
His only other question about the plug in the photo is that he wonders if that would be switched power to the transfer case because it’s part of the harness that he had to strip from the old harness that ran from the glove box down to the transfer case?
AFAIK, that Y - R wire is EFI power for the engine and ECM. It connects from the EFI relay on the driver's fender, to the engine engine harness, back to the ECM on the passenger sde. It is not needed for a LS Swap, unless you want to reutilize the EFI Relay to power some of the GM ECM (Ignition On).
He can use the EWD he has and check Y - R for himself.
The important connector near the starter is EC1, which is used for the t-case cdl and position switches
It, and all wires need to be retained from the engine harness. It has everything the t-case needs, as well as VSS.
Thanks brother. Appreciate it. He’s pretty sure he got everything he needs. Just wanted to be sure. Expecting some minor hiccups once exhaust is done and we can start playing with things and see what is functioning the way it should and what isn’t.
I've built around 5 dozen 1FZ 80 series engine harnesses and always used the EFI main relay to power the new ECM/PCM via EB1.
When I'm building a harness I always try to understand the intention of the original design and stay true to that for future troubleshooting.
When I'm building a harness I always try to understand the intention of the original design and stay true to that for future troubleshooting.
I modify 1ZF harnesses for swaps, not for stock engines.
On an unrelated note, your wiring guy's use of split loom would be a bit concerning to me.
I noticed that as well. He doesn’t use it and hasn’t used it in the rest of it, mostly electrically tape or the mesh loom is what he has been using and what I have seen him using in the truck. So I’m unsure why that is there in the photo haha
And thank you for clarifying about the harness.
tmxmotorsports
SILVER Star
That plugs doesn't go to the tcase wiring on the 1fz its right around the distributor coming from main engine harness the other end of the connector is attached to the body harness on the driver side.
tmxmotorsports
SILVER Star
I think the split loom is the factory loom in that picture
^this
Besides constant hot and fuel pump, these were the 4 wires I picked off the E7 plug to get my 12v switch for ECM, Tachometer, Brake Signal and MIL.
Black - Tachometer
Black/Blue - 12v switch (ign circuit)
Green/White - Brake Signal
Yellow/Red - MIL
There are two sets of black/blue and green/white, so you'll need to figure which one is 12v input. The other is output and doesn't give a 12v reading. I forget which pin number they were.
Black - Tachometer
Black/Blue - 12v switch (ign circuit)
Green/White - Brake Signal
Yellow/Red - MIL
There are two sets of black/blue and green/white, so you'll need to figure which one is 12v input. The other is output and doesn't give a 12v reading. I forget which pin number they were.
Might be worth mentioning at this point that there are 3 very different, wholly incompatible engine wiring arrangements in domestic usa 80 series. So if you guys are sharing wiring tips- say what year it's for. 91-92, 93-94, 95, 96-97 are all different. 95 is very similar to 96-97 though.
tmxmotorsports
SILVER Star
It's the same on 94 and 96 that connector that you pictured
So we are confirming that is the EB1 connector to the EFI main relay?
My advice is always to look at the EWD for your year and model for confirmation.
99% of the time, I am only looking at my EWD, which will always be a 1996 LX450. I know some connectors are identified differently between LX450 and 80 series, even for the same year (e.g. IH1 vs IL1).
From what I am looking at and very limited understanding of electrical I think @NeverFinis and @tmxmotorsports are referencing the same plug and wire.
tmxmotorsports
SILVER Star
Yes I am.