The Project Pad

Eric, if you need a *complete* ABS harness, I have one on my '99 A4q 1.8t parts car.

The wiring differences you see may be due to the addition of ESP and the different generations of Bosch ABS used in the B5. It certainly can get confusing, especially since they really limited themselves in the colors used in the system, many of which are used multiple times for different purposes. You really need to be careful with this one, you'll see why...

Anyway, here is what I have, hopefully it will help you out:

Red/black (large gauge, x2): fused +12v (term. 30)
Brown: Ground (duh)
Black/blue: switched +12v (term. 15?)
Red/black (small gauge): Brake light switch
Yellow/red: ABS warning lamp in cluster
White/black: Navigation L
White/brown: Navigation R
Brown/green: Emergency brake switch
Green: CANbus communication w/cluster
Green/black: CANbus communication w/cluster
Green/brown: K line

Wire pairs:
Green+Black: LF wheel speed sensor
Brown+Black: LF brake pad wear indicator
Yellow+Black: RF wheel speed sensor
Brown/green+Black: RF brake pad wear indicator
White+Black: LR wheel speed sensor
Brown+Black: RR wheel speed sensor

DE80q wrote:Not all that nutty in my opinion. ABS is nice to have when in the snow and ice, and you see a lot of that.

Actually, that's when you *don't* want ABS!

Hey thanks!

I've figured out what some of the connections are on mine, and many are the same as what you indicate, but a few seem different.

Here's what I've got, with notes based on a wiring diagram for a 2000 A4 and my experimentation:
Brown+black twisted pair: wheel sensor
Yellow+black twisted pair: wheel sensor
Green+black twisted pair: wheel sensor
White+black twisted pair: wheel sensor
Green: unknown - diagram shows it going to instrument panel, sets "open connection to instrument cluster" fault if not pulled up to +12 (ABS light maybe? but doesn't illuminate when there's a fault)
Green/black: k-line (diagnostic connector)
Green/brown: unknown
Red/black: brake light switch
Black/blue: switched +12
Heavy brown * 2: ground
Heavy red/black * 2: main +12
Yellow/red: unknown - diagram shows this going to instrument cluster, but with a pullup resistor to +12 I see pulses on it all the time
White/black: one diagram I saw shows this going to "headlight beam module"? Seems to be a speed output - puts out pulses that increase in frequency with wheel speed
White/brown: unknown

I'm curious: what do "Navigation L" and "Navigation R" mean in your post?

One thing I'm 99% sure of is that this unit is not from a car with stability control. The identification string when you connect to it with the VAG-COM has "EDL" in it, but not "ESC" or anything similar.

The white/black and white/brown connect to the navigation system if so optioned... They don't connect to anything otherwise.

I need to dig up my notes to make sure my post above is 100% correct as my memory apparently isn't what it used to be!

mr_aj_johnson wrote:I have a set of 4 eric. Won't be back in boise till after christmas. Gimme a call to remind me and I'll send em your way.

So... you probably don't remember this, but last December I posted in my build thread asking about center caps for a set of 5000 wheels - the little black octagonal ones. And you posted the reply above.

Do you by any chance still have them? I'm about to put the snow tires on the car, and I'm now realizing the wheels are just as cap-less as they were a year ago!

This week we have a little more progress on the Volvo K24... yay! 8)

For those that don't know, one of the issues with this turbo is the compressor housing sticks out farther toward the front of the car than the one on a stock 20V K24. And at least in my car, clearance is already tight in that area. I know a few people have used 3" cobra-head elbows with success, but I'm worried that might not fit in my car.

So I'm taking a slightly different approach. I had Dave Ehrmann (DE80q) machine down the OD on the compressor inlet to accept a smaller elbow.

As usual, he did an awesome job with the machining:


Here's the height of the compressor housing with the 3" elbow:


And here's the height of the compressor housing with the 2.5" elbow:


I gained about 1-1/4" of additional clearance by going with the smaller elbow. And as far as I can tell, 2.5" pipe should be plenty for 300-350 CHP.

WOW! more than 1" total differance by dropping down only a 1/4" in diameter! Thats pretty good.

Okay so we're going to make this "trivia question Monday"...

First item: can anyone give me a general idea of what inside rear view mirrors would fit my car without major modification? Mine is starting to deteriorate and it would be nice to get something newer. Bonus points if you can name an auto-dimming one that would fit (yes I know wiring would be required!).

Edit: Dave answered my second question. The bracket that holds the ABS pump on a B3 is welded, not bolted, to the body.

Thanks, all!

Define major modification... If you use the round style cam-lock button, you can use a TT small oval mirror or a B5 dimming mirror or even an early B6 dimming mirror with built-in compass. If you merely pop your current mirror off at the ball-and-socket, you can use a standard prismatic B4 or B5 mirror with your current mount. Some cars like the facelift D2 A8 started mounting the mirror overhead which wont work for you, and most everything from about 2005-up started using different windshield mounts with funky light and rainfall sensors, etc.

Now the big issue is removing your current mounting button without cracking your windshield. I'm using a nice, simple B5 prismatic mirror in my 80q. It's bigger than the standard mirror and obviously the clarity and lack of spots is a big bonus.

Hey thanks... that helps a lot! :-)

Further on the subject of mirrors... does anyone know if the outside rear view mirror glass on these cars is symmetrical - as in, the same glass fits both sides?

Here's why I ask... on my Saab, I was able to get a wide-angle LH outside mirror that's made for use on a euro-model RHD car. I absolutely love it, as it completely covers the usual blind spot off the left rear quarter of the car.

So I got to thinking whether I could do the same on the Audi. But when I look in ETKA, they make no distinction between left- and right-side mirror glass (the housings are, of course, different).

In the "local market" section of ETKA, there's a part 893857535G "mirror glass (aspherical-wide angle) with plate..." listed that looks like it might be what I want... but they don't specify which side of the car it's for.

The exterior mirror glass will swap left to right. There is aftermarket glass with the wide angle and blind spot available.

Austin,

Thanks!

I don't suppose you know any suppliers off the top of your head?

I googled these and there are a ton of them on ebay UK, but they all seem to say "doesn't post to USA". :(

The Latvian ebay shops have some. Just not the split glass blind spot for the 80/90 might ask the Latvian shops if they can get them? I'd also ask around to UK sellers to see if they'd ship to the US just make sure the mirrors aren't the stick on variety.
I got some for my urs4 but they came from China and seem to be more choices since they fit a few different cars.
This is what you would want but this a non-heated version
http://www.ebay.de/itm/Ausenspiegelglas ... 3cd887d5f2

Search ebay.de audi 80 Spiegelglas

There is this place http://stores.ebay.de/autospiegelglaste ... 7675.l2563
This
http://www.amazon.de/Spiegelglas-Au%C3% ... B009S8QNDI

Hey thanks for the tip! I *think* I found what I want on Latvian ebay... oddly enough the seller was in the UK. I'll know for sure when they arrive (I ordered two)... :-)

Continuing my trend of random topics... does anyone out there have an ABS wiring diagram for a 1995.5 S6 they could scan or photograph and email me? Or even photocopy and snail-mail... I'd be happy to pay for your trouble and postage.

It looks like I might be transplanting an ABS/EDL system from one of them thar S6s into my car... and I might be able to figure out the wiring by the lucky guess method, but having a diagram would probably reduce the chance of me letting the magic smoke out of the system!

Shoot me an email tomorrow and I'll send you some pdfs if i have them in alldata. I can't seem to concentrate lately....out of sight out of mind... ya know.

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Thanks... I'll do that!

Here ya go Eric. If you need more, Holler.

Hey thanks! :-) But it looks like Alldata may be confused a little. :(

The info in the diagnostic pages looks correct. But on the wiring diagrams, even though the page titles are correct, all the tables and illustrations are titled "ABS front wheel drive...". And the wiring diagrams don't show enough valves in the pump unit... they show four (one for each wheel... I thought two/wheel were needed?), but on the diag pages they refer to 8 per-wheel ABS valves plus four traction-control valves.

i'll take a look at that, there really shouldn't be any difference between fw or quattro, they still have 4 wheels that need to be controlled...unless you have seen a fwd audi with only 2 wheels.

The header shows fwd 95 audi a6/s6 all s6 were quattro... just the generic header.

Ah... got it. Thanks! :-)

Did the info match up with what you got? I have an s6 pump, computer and harness from my aan swap if you need parts.

Heh... I don't know... I haven't got the stuff yet!

I need to do a bit of a road trip to pull the parts... hoping to do it this weekend but haven't heard from the guy whether he's available yet.

Out of curiosity, how much would you want for the stuff you have? He quoted me a pretty good price, but I'd happily pay a bit more to avoid a couple-of-hour road trip and a couple hours working out in the cold...

Also is yours from a car with EDL? I definitely want the EDL functionality, so if it came from a car with manual diff lock it wouldn't be what I'm looking for.

Mine came from a 95.5 s6 pretty sure it had the did lock button so no edl. If you need edl function will have to find you 96+ diagrams don't think any of the s6's had edl.

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Well now I'm even more confused! My understanding was that the '95s had lockers in the rear and EDL came with the '95.5. Of course ETKA is no help because you can't look up a 1995.5. According to ETKA, '95s had rear lockers and '96s didn't. They don't show any VIN splits for either year.

I think it might be possible to tell by the appearance of the pump unit... any chance I could get a photo?