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D3 - Body and Exterior Bumpers, bonnets, glass, trims - Everything outside

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  #1  
Old 23rd March 2014, 09:22 PM
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Quote:
Originally Posted by snapdragon View Post
The mirrors and window don't look associated on the wiring diagram.
Here are the rear window fuse and relay.
If you turn on the rear window, does the LED on the switch stay on?
Does it affect DAB or FM reception?
I don't understand how they can't be associated when they are activated by the same button?

Fuse is fine and relay replaced

Light stays on and doesn't seem to affect reception

Ruddy cars! lol


Quote:
Originally Posted by HPsauce View Post
Whenever I've had heated mirror issues I've always done a couple of simple electrical checks:
Take the offending mirror off and check for voltage (12V or so) on the connectors and check the resistance of the mirror between terminals.

I'd expect the resistance to be under 10 ohms. Much higher and it won't take enough power to warm up much.

As it happens it's always turned out to be failed mirror(s), on several cars including my old S8 (newer one is OK at present, though the heated rear window is quite "slow").

My S8 mirrors are nuclear-powered though - they start steaming in seconds!
My Mirrors were always amazing also...thats why I miss them so much.

I'll check for power-not thought of that. (DOH-Blonde!)
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  #2  
Old 30th April 2015, 09:26 AM
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WOOOOO HOOOOOO

Guys I forgot to say that this problem is fixed!

I do feel rather stupid though... it was the connection behind the drivers side mirror.

So I wiggled the wires and voila, it started heating up! As did the rear screen and the n/s mirror.

This was all on Christmas evening.. Best xmas pressy I got

I have a feeling that the mirror had received a hard enough clump from someone to make a poor connection... what a shame I didn't check this sooner! I literally checked everything else!
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  #3  
Old 30th April 2015, 09:46 AM
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That's got to be the luckiest find ever, how the wiring behind the mirroe effects the rear demist is a strange one.
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  #4  
Old 30th April 2015, 10:26 PM
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Well done Bex.
Give that Gal a big prezzy.
This is the odd ball sort of thing that makes A8 ownership so interesting.
Have to keep this one warm for future reference.
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Last edited by tc4332; 30th April 2015 at 10:26 PM. Reason: Spelling mistake
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  #5  
Old 30th April 2015, 10:34 PM
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Score....but a weird one, well done
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  #6  
Old 11th May 2015, 12:38 PM
centurion centurion is offline
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hi... i have the same problem as my heated mirrors do not work hence was wondering how to remove mirror cover - what is the best way to do so and what tools to use?
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  #7  
Old 11th May 2015, 12:57 PM
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Originally Posted by centurion View Post
hi... i have the same problem as my heated mirrors do not work hence was wondering how to remove mirror cover - what is the best way to do so and what tools to use?
have a look at page 175 & 176 of THIS PDF
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  #8  
Old 20th October 2016, 10:57 AM
BLAKEY BLAKEY is offline
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A8L Chick
I've had this issue since I got my 8 and came across your post whilst browsing for a solution. I was a bit worried about popping off the glass at first but it was a lot easier than I expected. Wiggled the wires as you said and viola it started heating up. Thanks for the Tip!
Blakey.
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  #9  
Old 20th October 2016, 02:46 PM
snapdragon snapdragon is offline
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Originally Posted by BLAKEY View Post
Thanks for the Tip!
Blakey.
Wow - will have to try this, my driver's side has always been very weak compared to passenger's.
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