help with wiring harness

[JesseH]

ok, just getting my wire harness ready, by rewraping it and looming it although I need some help identifying some of the loose wires. In the first pic its the soild brown about 18gage, the clear one next to it.

This one there is a small clear right in the ECU plug area

This one is the two solid brown, and the two red with a black stripe. (inbetween the injector clips)

In this one the solid lime green and the solid brown (right in the area of the oil pressire wire, and the CPS)

In this one its the two clear wires in the ECU plug, 18 pin plug.

I know this is a hard one but any help you could give would be great.

 

[Nick M]

http://cgi.ebay.com/ebaymotors/1992...014QQitemZ330155170868QQrdZ1QQsspagenameZWD1V

http://cgi.ebay.com/ebaymotors/1990...014QQitemZ330183786819QQrdZ1QQsspagenameZWD1V

http://cgi.ebay.com/ebaymotors/TOYO...009QQitemZ190154844495QQrdZ1QQsspagenameZWD1V

 

[JesseH]

http://cgi.ebay.com/ebaymotors/1992...014QQitemZ330155170868QQrdZ1QQsspagenameZWD1V

http://cgi.ebay.com/ebaymotors/1990...014QQitemZ330183786819QQrdZ1QQsspagenameZWD1V

http://cgi.ebay.com/ebaymotors/TOYO...009QQitemZ190154844495QQrdZ1QQsspagenameZWD1V

actually ive never seen that before, but I dont have the cash for one of those, im having a hard enough time trying to get this car finished up. Is there anyone who can help me identify these?

 

[slidebabyslide]

those clear ones look like the KS wires.

 

[slidebabyslide]

the red ones look like the ones that go to the vsv http://www.cygnusx1.net/Supra/Library/EPC/291410/catalog.aspx?F=1708&P=3

 

[slidebabyslide]

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=FI&P=31

 

[JesseH]

Whats the KS wires?? And VSV is also what i was thinking on the red ones I just wasnt 100% sure. thanks for the help though:icon_bigg now I only need to figure out a few more...and is the VSV nessary to keep?

 

[nvgc8]

KS wires = Knock Sensor wires

 

[nvgc8]

Color coded Supra wiring diagram.
http://www.cygnusx1.net/Supra/Library/TEWD/MK3/manual.aspx?S=Main&P=35

 

[JesseH]

those clear ones look like the KS wires.

you were right the two clear ones are KS, I used a multimeter and traced out where they went, the only question I have now is how do I know whitch one is KS1 and KS2?? is the top left clear one the first and the one right next to it the 2nd one on the plug? or does it matter? and is it nessacary for me to keep the VSV??

 

[slidebabyslide]

To be honest i don't think it matters for the KS. The VSV i would say keep it. I had that off and my car ran like crap. I honestly don't really know. I would ask more season supra owners.
good luck.

 

[thevork]

You can hook the KS wires up the way you like it. Doesn't matter if you swap the first for the second or not.

As for the VSV's. You must keep the front one. That one is for your fuel compensation if i'm not mistaking. When you make boost the fuel pressure must rise accordingly. I.E. if you make 5 PSI of boost, the fuel pressure must rise by 5 PSI also.

The back one (the one closest to the firewall) is for your EGR valve which you can ditch completely. Just remove it and put on two EGR blockoff plates. you can make them yourself or buy them. they're cheap.
If you plan to keep the EGR, also install the VSV. It's there for a reason.

 

[KC Kirk]

Please note that a true 1987 Supra Turbo has a different wiring harness than the 1989 TSRM in the Cygnus web site.

I do have an original 1987 TSRM. Here is a rather poor image of the ECU plugs, as viewed from the plug-end.

View attachment 87 ECU.bmp

 

[JesseH]

Please note that a true 1987 Supra Turbo has a different wiring harness than the 1989 TSRM in the Cygnus web site.
I do have an original 1987 TSRM. Here is a rather poor image of the ECU plugs, as viewed from the plug-end.

Yea, I know there are two different ones and that the 89+ diagram gave me just enough to for sure know that they were the Knock sensors. but by posting that I have now figured out the other wires that I still needed. thanks for the diagram, ill be sure to save that one.