[Frictionlesseuros]

I recently picked up a coupe quattro rolling chassis and have an AAN motor and 01E going in. I know there’s a million threads explaining the wiring but to be frank…I’m a moron. I have all the OE CQ/7A wiring in a giant storage tub. Can somebody explain in slow-poke terms what I need or is anybody in the NJ/NY/PA area willing to wire her up for me for cash?

This is the first time I’ve ever picked up a build to this extent. I’ve played w B6-B8 chassis the last few years but I’m definitely in over my head on this one.

 

[DE80q]

Where are you located? Im a 10v guy, but have more than I care to admit dealings with the B3 wiring.

 

[Frictionlesseuros]

Where are you located? Im a 10v guy, but have more than I care to admit dealings with the B3 wiring.

North NJ, 20m out from the city

 

[varia]

Adam is in NJ (https://www.instagram.com/quattro_kid), did a lots of swaps.

 

[jonas-k]

Awesome! The world needs more B3 Coupe 20VT cars.

Regarding the wiring, I would recommend one of two options.
1. Pay a professional to do it. This will be expensive, but a resource to return to when things aren't working right.
2. Do it yourself. This way when something doesn't work, you can track down the problems and fix them. Having intimate knowledge of the wiring of the car will be very useful in the future.

Having a buddy do it would be the last thing I would consider.

In general, for the wiring (assuming that you have an essentially bare chassis, with all the wiring in a bin) you need to separate the engine wiring from the chassis wiring. This is tedious but not impossible. A Bentley manual or good copies of the electrical wiring diagrams with the colors will be essential. You would keep all the chassis wiring (instruments, seat power, window power, etc. etc) with the car and reinstall what you need. Label as you go and expect to spend 20+ hours on this.
Then you need the AAN harness (assuming you are using the AAN ECU). There are a few points where they merge that are outlined in various posts.

Tips:
Get the right tools.
You need a pin-removal tool to release the pins from their connectors.
Get a ratcheting crimp tool to make any crimps. Use good quality Open Barrel connectors for all the connections (not the Red/Blue/Yellow crimp connectors sold at your F.L.A.P.S.)
No solder on automotive wiring connectors
Tesa 51036 harness tape is good for the engine compartment use
Tesa 51608 cloth tape is good for inside the car
Come here for help.

I'm sure I'm forgetting something.

 

[Frictionlesseuros]

Awesome! The world needs more B3 Coupe 20VT cars.

Regarding the wiring, I would recommend one of two options.
1. Pay a professional to do it. This will be expensive, but a resource to return to when things aren't working right.
2. Do it yourself. This way when something doesn't work, you can track down the problems and fix them. Having intimate knowledge of the wiring of the car will be very useful in the future.

Having a buddy do it would be the last thing I would consider.

In general, for the wiring (assuming that you have an essentially bare chassis, with all the wiring in a bin) you need to separate the engine wiring from the chassis wiring. This is tedious but not impossible. A Bentley manual or good copies of the electrical wiring diagrams with the colors will be essential. You would keep all the chassis wiring (instruments, seat power, window power, etc. etc) with the car and reinstall what you need. Label as you go and expect to spend 20+ hours on this.
Then you need the AAN harness (assuming you are using the AAN ECU). There are a few points where they merge that are outlined in various posts.

Tips:
Get the right tools.
You need a pin-removal tool to release the pins from their connectors.
Get a ratcheting crimp tool to make any crimps. Use good quality Open Barrel connectors for all the connections (not the Red/Blue/Yellow crimp connectors sold at your F.L.A.P.S.)
No solder on automotive wiring connectors
Tesa 51036 harness tape is good for the engine compartment use
Tesa 51608 cloth tape is good for inside the car
Come here for help.

I'm sure I'm forgetting something.

Just having that little checklist definitely helps a good bit. Everybody on this forum is pretty dang helpful and gave me people to reach out to. I also reached out to a few other specialists I know that made me feel way more confident in the process. It’s just looking at it all in a bin that I think is the daunting part. I’m sure I’ll figure it all out and I’ll reach back out here if I need help. Thanks boss!

 

[kido81]

Im located in central jersey if you need help.. shoot me a pm ill send you my number...

Thanks Chris (varia)

 

[jbrentd]

Glad to find your project. I'll be following along.

@varia or @kido81 Would the ABY/ADU guide do him any good? Not sure how similar they are to the AAN.

I made a guide for integrating a 3B harness to a B3 for my project, but it's not the same.

 

[tecknoquatt]

I have a bunch of diagrams and resources I got from guys at S2Forum from when I put an AAN in my B4 90. There should be enough info there for a B3 chassis to help you as well. I did this 12-13 years ago so its not fresh in my mind. Drop your email and I can send a link to download them. I use a LHD ABY engine wiring harness when I did it. One of the things was needed was to relocate some of the relays in the fuse box. Pretty straight forward though one you have things out and have a complete harness. Splicing harnesses will be more involved and more room for error but can be done.

 

[Frictionlesseuros]

[email protected]

I have a bunch of diagrams and resources I got from guys at S2Forum from when I put an AAN in my B4 90. There should be enough info there for a B3 chassis to help you as well. I did this 12-13 years ago so its not fresh in my mind. Drop your email and I can send a link to download them. I use a LHD ABY engine wiring harness when I did it. One of the things was needed was to relocate some of the relays in the fuse box. Pretty straight forward though one you have things out and have a complete harness. Splicing harnesses will be more involved and more room for error but can be done.

 

[tecknoquatt]

Email sent.

 

[JaredLandgren]

I recently picked up a coupe quattro rolling chassis and have an AAN motor and 01E going in. I know there’s a million threads explaining the wiring but to be frank…I’m a moron. I have all the OE CQ/7A wiring in a giant storage tub. Can somebody explain in slow-poke terms what I need or is anybody in the NJ/NY/PA area willing to wire her up for me for cash?

This is the first time I’ve ever picked up a build to this extent. I’ve played w B6-B8 chassis the last few years but I’m definitely in over my head on this one.

To help with wiring the AAN harness, EFI in new hampshire will internalize the relays and make the harness much easier to install into the coupe. It cost a bit of money but i felt similar to you with the wiring and that helped me a lot when i wired it in. MG and EFI were my best friends for info. Hope that helps

 

[varia]

I did many swaps (5 in the last year alone) but I'm telling everyone: get a new harness. My good friend (Norbitron) makes new harnesses, custom taylored for your specs, very affordable, and NEW.
Nothing more frustrating than installing an old, improper (rhd or large chassis) harness, with broken connectors, wires and then chasing problems.

 

[jbrentd]

I did many swaps (5 in the last year alone) but I'm telling everyone: get a new harness. My good friend (Norbitron) makes new harnesses, custom taylored for your specs, very affordable, and NEW.
Nothing more frustrating than installing an old, improper (rhd or large chassis) harness, with broken connectors, wires and then chasing problems.

I've heard many say that over the years and now I am dealing with some of this. Had to repair connections at the intake air temp and coolant temp sensors...so far. I hope that is all that is needed.