[Es2] my 20vt project

Ben Klumper bklumper at mdbworld.com
Thu Oct 7 14:18:45 EDT 2004


I've attached a pic of where I cut the new hole for the 3B harness after I
removed the battery box. There's a nice flat spot that's big enough for the
hole. Which reminds me; don't cut the hole too big for the harness grommet!
Better to start with one that's too small so you can enlarge it little by
little with each test fit. You definitely want a tight seal.
You'll be 'releasing' the wiring bundles on the CQ in the fuse box area in
order to install all the 3B connections. I pulled both the main and aux.
fuse panels right out (labeling everything along the way of course). In
fact, I had the entire dash out of the car. (see pic) This gave me plenty of
room to work and see what I was doing. One of the benefits of cutting the
new hole is that it simply works better with the 3B harness. This is the way
it goes through the fire wall in the 200, so all the lengths work out
better. You don't really have "extra" wire to coil up. I chose to keep my AC
so drilling a new hole was the only way to go. The one thing I'm unsure of
is how the S2 harness would differ from the 200's harness. Does it use the
CQ firewall hole?
The wiring diagrams do not show which harness particular wires belong to,
aside from saying things like "left side engine harness", which you'll soon
learn is somewhat vague in its description. I'll try to find some time to
post my notes on the wiring this weekend. Hopefully it will take some of the
guess work out of this task for you and others. I will say that the wiring
took a solid two months worth of weekends to figure out completely!


-- Original Message ----- 
From: "Rick Houck" <rhouck at neo.rr.com>
To: "Ben Klumper" <bklumper at mdbworld.com>; <es2 at audifans.com>
Cc: <livinotte at cox.net>; "David Kase" <davekase at pdqlocks.com>; "Peter
Schulz" <pcschulz at comcast.net>; <Andrew.Jackson at bmo.com>; "mike"
<mike at uncutproducts.com>; "The Corbs" <c.corbishley at comcast.net>
Sent: Wednesday, October 06, 2004 8:39 PM
Subject: Re: [Es2] my 20vt project

> Ben, Josh, Dave, Peter, Andrew, John, and Mike,
> Thanks for all the good feedback. To be perfectly honest, the wire bundles
> are packed so tight under the fuse box that I would welcome cutting a new
> hole in the firewall for the new harness. Even a "simple" wiring change
> MUCH more difficult when you factor in the trouble of moving large stiff
> bundles around to see where a wire leads. That doesn't even include trying
> to cut 15 year old tape wrap with gooey adhesive sticking all over your
> hands.
> Ben, I would love to see where your harness comes through. I want to use
> stock coupe ECU location, but I want to be sure to locate the hole where
> will not interfere with something else. If I were not planning to keep the
> AC, I would just go through that large hole. Did you keep yours, too? I
> take care of any extra wire length by coiling it somewhere.
> The coupe engine harness seems to have wires going everywhere, including
> instrument cluster area, fuse box, relay panel, and somewhere under the
> right side carpet. I did notice an oil temp sensor wire and a couple of
> others going to the right side of the engine bay in the main harness. I am
> assuming that other wires for the brake, hydraulic, and coolant
> fan, and some other left side things will also need to be preserved. I
> not yet put the two wiring diagrams next to each other to compare, but I
> don't think they tell what wires are in what harness. Do they?
> Any photos would help me grasp the scope of the wiring changes, and of
> course any notes you made would be helpful to everyone who wants to start
> their own project.
> Many thanks for the good feedback and your patience and understanding.
> my project is a true resurrection of my 47k miles "parts" car. This car
> down to just the tub that had to be moved by forklift. I have truly seen
> every nut and bolt in it.
> Rick in Ohio
> ----- Original Message ----- 
> From: "Ben Klumper" <bklumper at mdbworld.com>
> To: "Rick Houck" <rhouck at neo.rr.com>; <es2 at audifans.com>
> Sent: Wednesday, October 06, 2004 11:00 AM
> Subject: Re: [Es2] my 20vt project
> > Rick,
> >
> > On my project, I removed most of the 7A engine harness. There are bits
> > pieces of the 7A wiring that I kept (coolant level warning, brake fluid
> > level warning, washer fluid level warning, headlamps, etc.). I can be
> > exact if you need, it's just a matter of looking back at my bentley
> manual.
> > I notated every wiring step pretty well in there. In fact, I''ve been
> > meaning to post my notes, I just haven't got around to it yet. Basically
> you
> > want to look at and label everything on the 3B harness and whatever is
> > missing, keep from the 7A wiring.
> > Running the wiring through the firewall depends on where you locate the
> ECU.
> > I located my ECU in the stock 7A position tucked up behind the heater
> > core/evaporator unit. This necessitated cutting a new hole in the
> firewall,
> > just below where the battery box used to be. I can send you pics of that
> if
> > you'd like. Others have located their ECU under the steering column,
> > allows the use of the existing hole.
> >
> > HTH
> >
> > Ben
> >
> > >
> > > _______________________________________________
> > > Es2 mailing list
> > > Es2 at audifans.com
> > > http://www.audifans.com/mailman/listinfo/es2
> >
> >

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