1997 Audi A4 Quattro Relay Diagram

Desember 23, 2021

08-27-201305:13 PM #1

Active Member Two Rings

Relay diagram

I just need a relay diagram for my 01 A4, here's a picture:

2001 Audi A4
Quattro 1.8T Sport 5 speed

H&R springs and sways, Bilsteins, open air intake, test pipe, borla catback, AWE DTS, tuned, boost gauge, BBS wheels
08-27-201306:16 PM #2

Veteran Member Four Rings

I doubt you need a diagram that shows what all those do. What do you really need? IE: What is your problem? Let us help you.

Sigh...

Oh, alright:

I do believe the last diagram is incorrect and the A/C clutch relay is the little guy in position number 1.

Also, you have some SPLAININ' to do about that red wire that is tapped onto the 75x post with no fuse. You do realize that is completely unfused all the way to the battery? That puppy rubs and shorts against that metal bracket that it is *touching in that very photo* and your dashboard will catch fire. Your car will burn to the ground. Well, maybe not completely to the ground. The fire department may be able to save your tail lights or something.

^Don't listen to this guy, he's not even a mechanic.
2001 Laser Red A4 1.8TQM, 5-Speed Swapped, 4.11 Final Drive, APR 93, 2.5" Exhaust, ST Coilovers, 034 RSB, A8 Brakes Front & Rear
2006 Passion Red Volvo V50 T5 AWD 6MT
2000 Satin Silver Passat 1.8T FWD Wagon, Slippy Tiptronic, 15" Hubcaps
1999.5 Aluminum Silver Metallic A4 Avant 1.8TQTS (winter sled)
08-27-201308:22 PM #3

Veteran Member Four Rings

Yeah, 267 is the A/C compressor relay. I think the Bentley says something about it going in any open spot. Mine was also in position 1.

'16 Q5 3.0t S-line Daytona Grey Pearl, Black Optics, APR stage 1, Magnaflow exhaust (Looking for stock exhaust)
'16 S3 Misano Red Pearl, Black Optics
Gone -
'13 Q5 2.0T Premium Plus
'13 BMW 135Is 6MT Coupe - #387/586
'01 S4 6MT - SRM K24's, Stock Block, E85 448/392 Mustang Dyno
'12 A3 TDI Premium Plus
'10 A3 Premium
'99 A4 2.8 5MT
08-27-201309:17 PM #4

Active Member Two Rings

That's the power wire to illuminate my boost gauge, I was looking to relocate it as the previous owner put it there. I'll move it to the fuse box.

2001 Audi A4
Quattro 1.8T Sport 5 speed

H&R springs and sways, Bilsteins, open air intake, test pipe, borla catback, AWE DTS, tuned, boost gauge, BBS wheels
08-27-201309:42 PM #5

Veteran Member Four Rings

That's a good explanation. Blame everything on the PO, that's what I do. ;)

You can safely get power there, so long as you have a fuse in-line - as close as practical to the terminal.

^Don't listen to this guy, he's not even a mechanic.
2001 Laser Red A4 1.8TQM, 5-Speed Swapped, 4.11 Final Drive, APR 93, 2.5" Exhaust, ST Coilovers, 034 RSB, A8 Brakes Front & Rear
2006 Passion Red Volvo V50 T5 AWD 6MT
2000 Satin Silver Passat 1.8T FWD Wagon, Slippy Tiptronic, 15" Hubcaps
1999.5 Aluminum Silver Metallic A4 Avant 1.8TQTS (winter sled)
08-28-201301:39 PM #6

Active Member Two Rings

Blame every single problem on the PO. Now that I think of it though, the PO bought it modded how it is right now, he wasn't a car guy. The guy before the PO did everything to it.

2001 Audi A4
Quattro 1.8T Sport 5 speed

H&R springs and sways, Bilsteins, open air intake, test pipe, borla catback, AWE DTS, tuned, boost gauge, BBS wheels
08-28-201301:50 PM #7

Veteran Member Four Rings

Originally Posted by ConradS

Blame every single problem on the PO. Now that I think of it though, the PO bought it modded how it is right now, he wasn't a car guy. The guy before the PO did everything to it.

I always blame everything on the previous previous owner! So that would be Audi in my case!

'16 Q5 3.0t S-line Daytona Grey Pearl, Black Optics, APR stage 1, Magnaflow exhaust (Looking for stock exhaust)
'16 S3 Misano Red Pearl, Black Optics
Gone -
'13 Q5 2.0T Premium Plus
'13 BMW 135Is 6MT Coupe - #387/586
'01 S4 6MT - SRM K24's, Stock Block, E85 448/392 Mustang Dyno
'12 A3 TDI Premium Plus
'10 A3 Premium
'99 A4 2.8 5MT
08-28-201303:27 PM #8

Veteran Member Four Rings

^Don't listen to this guy, he's not even a mechanic.
2001 Laser Red A4 1.8TQM, 5-Speed Swapped, 4.11 Final Drive, APR 93, 2.5" Exhaust, ST Coilovers, 034 RSB, A8 Brakes Front & Rear
2006 Passion Red Volvo V50 T5 AWD 6MT
2000 Satin Silver Passat 1.8T FWD Wagon, Slippy Tiptronic, 15" Hubcaps
1999.5 Aluminum Silver Metallic A4 Avant 1.8TQTS (winter sled)
08-28-201303:43 PM #9

Active Member Two Rings

Completely unrelated, but since you're here, walky.... when I roll my windows all the way up or down, when I let my finger off the switch, my RPMs jump for a second- at idle of course. Not really sure what the problem is...

2001 Audi A4
Quattro 1.8T Sport 5 speed

H&R springs and sways, Bilsteins, open air intake, test pipe, borla catback, AWE DTS, tuned, boost gauge, BBS wheels
08-28-201303:56 PM #10

Veteran Member Four Rings

Originally Posted by ConradS

Completely unrelated, but since you're here, walky.... when I roll my windows all the way up or down, when I let my finger off the switch, my RPMs jump for a second- at idle of course. Not really sure what the problem is...

Happens to me too. I have a feeling either a. its my battery that's quite old, must be replaced before cold weather or b. alternator? not sure really but it does annoy
08-28-201307:25 PM #11

Veteran Member Four Rings

When you load the window motor like that, the amp draw spikes significantly. Momentary blip in the idle is expected. If the change is excessive, I would make sure the battery and alternator are up to spec (load test each with VAT-40).

The idle could also be overly sensitive due to mixture problems, vacuum leaks, incorrect timing, etc. Where it's already working overtime to smooth it out and load changes throw it for a loop.

I would venture to guess there is nothing wrong with your car. Scratch, that - there's probably tons of crap wrong with your car. But the symptom you describe is likely a non-issue.

^Don't listen to this guy, he's not even a mechanic.
2001 Laser Red A4 1.8TQM, 5-Speed Swapped, 4.11 Final Drive, APR 93, 2.5" Exhaust, ST Coilovers, 034 RSB, A8 Brakes Front & Rear
2006 Passion Red Volvo V50 T5 AWD 6MT
2000 Satin Silver Passat 1.8T FWD Wagon, Slippy Tiptronic, 15" Hubcaps
1999.5 Aluminum Silver Metallic A4 Avant 1.8TQTS (winter sled)
08-28-201308:03 PM #12

Active Member Two Rings

It probably jumps a good 150 rpm. I've never had a car do this before, and I've owned quite a few...

How do I load test the battery and alternator? I've never done that before and I don't know what VAT-40 is.

2001 Audi A4
Quattro 1.8T Sport 5 speed

H&R springs and sways, Bilsteins, open air intake, test pipe, borla catback, AWE DTS, tuned, boost gauge, BBS wheels
08-29-201306:32 AM #13

Veteran Member Four Rings

Walkys point about an already existing issue is likely for me. I am very certain I have some sort of vacuum leak in the system, all the more reason to get on top of it.
08-29-201312:43 PM #14

Active Member Two Rings

I'm sure I probably do too but I don't know how to check that either. Never have needed to.

2001 Audi A4
Quattro 1.8T Sport 5 speed

H&R springs and sways, Bilsteins, open air intake, test pipe, borla catback, AWE DTS, tuned, boost gauge, BBS wheels
08-29-201301:53 PM #15

Veteran Member Four Rings

Originally Posted by ConradS

I'm sure I probably do too but I don't know how to check that either. Never have needed to.

There are some pretty nifty DIYs on Youtube for performing smoke tests on the vacuum system if you're interested.