Wiring questions?

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AmoebAssassin
Posts: 2424
Joined: Wed Nov 17, 2004 7:11 am
Car: 1991 Base fastback 5spd, black

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Everyone, I've got a couple issues I hope you guys can address.

First, I used the FRsport link, seen here:

http://www.frsport.com/sr20det....html

I have some issues with their guide.

At the end of the guide, below figure 5, they tell you to connect the green/yellow on the KA plugs to the green/yellow on the SR harness. They do not mention, however, that there are two green/yellows on both the KA plugs and the SR harness. Both of the green/yellows on the KA plugs' pigtail go to the same gray plug. However, looking at the chassis side, there is only one green/yellow on the chassis side of the same gray connector. I assumed that the green/yellow on the KA plug pigtail with no match on the gray chassis side KA plug was an extra unused wire. I assumed the single green/yellow on the chassis side gray KA plug to be the A/C relay, found the A/C relay on the SR ECU pinout (green/yellow) and hooked it up to the corresponding wire on the gray KA plug pigtail and left the other two green/yellows disconnected. Is this correct?

Again in figure 5, they tell you to hook up the brown wire (O2 sensor pwr) to any +12v switched. They do not say where a convenient place to splice in for +12v switched is, so I looked at the chart below figure 5 and saw ECU Power (black/white). I spliced into this, assuming it was 12v switched. However, I am starting to second-guess myself and think that I should be spliced into the red/black (ECU Relay). I am starting to think that the black/white is +12v constant to the ECU relay, and that the red/black is a +12v switched signal to the ECU relay. Which wire should the brown O2 sensor power wire be spliced into, the black/white or the red/black?

Finally, again below figure 5 they mention to connect the blue/red and black/red on the SR harness to the black/red wire on the KA plug pigtail. My harness had two blue/red wires. I looked up the ECU pinouts and one of them was coilpack power, and the other was ignitor power (i think). Therefore, I hooked up both of the two SR harness blue/reds to the SR harness black/red, and then all three of these to the KA plug pigtail black/red. This gave me a four-wire junction, wheras the article implies a three-wire junction. Should I have these four wires connected, or should one of the blue/reds go elsewhere?

Thanks for the assistance. I'm kind of a n00b at wiring (this being the first harness I've done for the first swap I've done).


User avatar
AmoebAssassin
Posts: 2424
Joined: Wed Nov 17, 2004 7:11 am
Car: 1991 Base fastback 5spd, black

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Anybody care to tackle this?

S13240
Posts: 1908
Joined: Fri Jul 26, 2002 8:06 am

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For the green/yellow wire, there's only one. I think you're getting confused with the green/yellow wire and the yellow/green wire. Very similar, but look close and you can tell the difference. Color to color man.

As for the brown wire for o2, I just hooked it up to any 12v source as said. Anything from coilpacks, fuel pump, ecu, etc...I did mine on fuel pump I think.

User avatar
AmoebAssassin
Posts: 2424
Joined: Wed Nov 17, 2004 7:11 am
Car: 1991 Base fastback 5spd, black

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I swear, both of my harnesses had a yellow/green and two green/yellows. Freakin mystery harness.

Thanks for the help on the +12v switched.

Any info on the blue/reds anyone?

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AmoebAssassin
Posts: 2424
Joined: Wed Nov 17, 2004 7:11 am
Car: 1991 Base fastback 5spd, black

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Bump

User avatar
AmoebAssassin
Posts: 2424
Joined: Wed Nov 17, 2004 7:11 am
Car: 1991 Base fastback 5spd, black

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Anyone?

S13240
Posts: 1908
Joined: Fri Jul 26, 2002 8:06 am

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I only remember seeing one blue/red wire as well, it should be the thicker blue/red wire and black/red wire on sr harness that is connected to the black/red wire on ka plug.

Oh and some pictures of your harness would help so I can better help since no one else doesn't care.


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