Buy a half cut. it will make your life 1 million times easier...
Wiring isn't as bad as you may think. Take the engine out of the half cut with the engine harness still on. i.e. disconnect it from the ecu behind the dash and pull it out through the engine bay. If you get a series 2 jzx90 two of the four ECU plugs will be part of the BODY harness so they will need cutting, but its best to remove the entire body harness to make sure you know what you're doing. There's a couple of wires that go out from the ecu on the body side, then straight back in on the engine side only about 6" away from the ecu. Best to not cut these.
Once you have all the ecu wiring free of the body harness, there's only about 5 wires to power the ECU. Batt, main rel switch, ign power, main rel power x2. Fuel pump control and warning light is on these too.
Other than that there's a grey plug down from the ECU with two fat pins and a few smalls. This is yo important plug, has igniter and injector power, idle control power, tacho, starter exciter...
Another 20pin white plug is further down. This has alot of secondary stuff that's not needed.
The rest is for TRC, ABS, auto stuff and diagnostics which the ECU can run without.
Fuel is a little tricky because the jzx90 has a fuel pump ECU mounted in the boot. The outgoing signal from the ECU for the FP relies on a feedback from this FP ECU, otherwise the ECU cuts it, thinking the engine has stalled. The signal is also PWM, not just a 0-5v or something.
Acc cable will be fine. Use the one from the 90, it will fit on the cressy pedal and be correct length.
Power steering pump is on the other side of the motor, but again, the p/s hose from the half cut will fit. Even if the p/s rack on the cressy has a flare nut fitting, the Banjo bolt from the 90's hose will fit and seal.
http://wilbo666.pbworks.com/w/page/4...JZZ30%20Soarer
Following JZZ30 diagram will set you on the right track, theres only a few pin configurations that are different with the body plugs. Use the colours of the wires to help too (black = ground, red = power etc.)
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