So I have a 1JZ in my FC and I have to wire up the injectors and igniter; then it should run.

I am trying to wire them up using my main relay, but the wires are different from every year diagram (FC is a 1990 5 speed N/A version with power everything).

The fsm shows for Non-Turbo 1989-1991 Models
Two Prong Connector: Black and Black/white. Mine are black/yellow, and white/black.
Four Prong Connector: Black/white, and black/yellow, White/blue, and White/red. Mine are Blue, another Blue, Black, and Black/yellow (possibly white, age).

Which connector should I be connecting my injector wires to? I'm not sure because when I was testing with a multimeter, none of the wires were 12v switched ignition when they weren't connected to the harness (say four prong connected and two prong not and vice versa).

Maybe I just don't understand it, but wouldn't both connectors have 12v switched ignition if the correct connector was hooked up to the harness?

 

Why not splice to the Injector fuse at the Fuse block and use that?

 

With respect to the plug in the relay which has 4 wires, two of these wires come from the EGI fuse in the engine bay fuse box thus these two wires would have constant voltage on them. How many of these 4 wires of yours has constant voltage?

 

No idea, going to change my setup and do that tomorrow. Would be a lot cleaner than what I have going on.

I figured it out today. I don't know why, but I was looking at the main relay for the wire colors, not the harness wires. But I found out that the White/Red wire from the harness has constant voltage so if you use it to power the small blue or small black wire on the relay, you get power to the bigger blue or black wire on the relay.

But I didn't want to cut off the connectors on the relay just yet and I think I'll do what misterstyx69 said above.

Thank you both for your help.

 

The plug with two wires at the main relay features a wire which is a ground while the other wire (Black/White) is powered by the 15 amp engine fuse, which means the wire has voltage w/the key to both on and start. If you are powering this wire w/constant voltage then you are powering various items of the engine w/constant power which over time will probably drain your battery.