NG harness wiring for ECU

[ben swann]

Quattrophile and fellow swapaholics,

I reached a major milestone last week on "Project GTQ" begun several
years ago when the NG engine was bolted to the bellhousing.  I should
be able to get it started soon after hooking everything up.

I was hoping for some confirmation/feedback on the questions I posted
for the wiring harness.

Although I have consulted the Bently and other diagrams and information
at hand, I could use help confirming where/which are some of the
harness connections and power wires.

So I am reposting, assuming this was glossed over earlier.  I
appreciate any help.

Thanks.

Ben

----- Original Message -----
From: ben swann <benswann at comcast.net>
Date: Thursday, July 17, 2003 10:57 am
Subject: Re: NG harness wiring for ECU
I was hoping to get some help on the harness wiring for the NG/CIS-E3
installation fo "Project GTQ"

I revised and put on a web page - hope I can get some feedback.

http://Ben_Swann.homestead.com/NGwiring.html

My main questions are:

Which are Power wire and Ground?

What are the major functions for barrel connectors - Black, Green and
Red?

Hopefully my webpage makes clear what I'm asking and will help others
who may be insane enough to try this in the future.

TIA

Ben
----- Original Message -----
From: ben swann <benswann at comcast.net>
Date: Thursday, July 10, 2003 11:34 am
Subject: NG harness wiring for ECU
[note: original text below edited and revised for clarity/correction]

- "Project GTQ" installing NG engine into '87 4000 CS quattro.

- CIS-E wiring harness remove routed the CIS-E3 harness from 87.5 GT
Coupe through the firewall.

> I am trying to identify some of the connectors that go over to the
left/drivers side of the car as well as power source and ground.

There were similar connectors on the CIS-E harness, but some
differences
>
> Can anyone identify Power wire and Ground.
>
> Here are the harness connectors description:
>
> Red barrel connector has 3 wires -
> G/V .5
> G   .5
> B/R .5
>
> I noticed the corresponding same type of Red Barrel connector was
> not used on the CIS harness I removed.
>
> Black Round Barrel connector -
> B/Bl 1.5
> B    1.0
> G/R  2.5
> G/B  .75
>
> There was a black square connector that I disconnected for the  CIS-E
harness.  It does not have the same wire/sizes.  Is this a
corresponding connector/Are some of these leads used for CIS-E3?
>
> Green round/barrel connector:
> Br/B  .5
> G/Y   .5
>
> This is similar to the one I pulled out for CIS-E, but wire
size/colors are  different.
>
> Small black with two B/W .5 wires
>
> Separate wires/connector clipped?
> G/R  .5
> B/W  .5
> Br/Bl  .5
>
> I appreciate any leads on what wires I definately need for power
> as  well as which if any of the above I need, or the major function
> performed by the different connectors above.  Following that any
> that  may be used for other ancillary functions like trip computer,
> tach, etc.
>
> Also any suggestions on where/how to tap the power which according
> to  Bentley is 2.5 R/W and I assume in black barrel connector,
> but like to verify.  I assume relaying power from somewhere either
off Fuse panel (hard to get to) or dedicated power wire with relay from
ign. track 15 (where to tap control wire?).
>
> Anyone have diagram showing the CIS-E3 harness with connectors?
> TIA for help.
>
> Ben