rear heated windscreen does not work

**benjie** · 02-01-2010,07:24 PM

Good news as it's getting colder!

**badboi4lyff** · 10-01-2010,02:50 AM

hi mate can you tell me how you got the switch to work.. i have the same problem, i got my heater console out of a 2007 a4 and it just lights up for a sec then goes out.. i looked at a post on another site but it looked too complicated..!

**benjie** · 10-01-2010,03:03 AM

PM me your e-mail address and I can e-mail you the instructions. If you find them too difficult (I had to get a mate to help me!) then take them to an independent garage and they should be able to do something with them!

**audisingh** · 10-01-2010,09:32 AM

If you follow the tutorial in the word document that Ben sends you, it should be pretty straight forward. I just brushed up my knowledge on how relays work prior to the install. Let me know if you need any help.

**sdthorne1** · 21-02-2011,04:39 PM

Hi
can anyone please ping me the instructions on how to wire in the above demister relay as i have the same problem after installing a later controller. My email address is sd_thorne@btinternet.com.
Many thanks
Steve

**benjie** · 21-02-2011,11:41 PM

I will e-mail you as soon as I have access to me laptop as the documents are on there...

I'm currently on holiday in Dublin (Mmm... Guiness!)

**benjie** · 25-02-2011,12:28 AM

E-mail sent.

**sdthorne1** · 27-02-2011,10:26 AM

Thanks mate. Took me a while to figure them out but they made sense in the end. However was reading some other posts on here and found one that says you can just swap the face plates over and hey presto.
But thanks again for taking the time to send through!

**Myersjow123** · 30-01-2012,10:49 PM

Originally Posted by benjie

I was about to ask if you had changed the climate unit due to wearing buttons/heated switches needed and you've answered it!

It is the wiring I'm afraid (or lack of it) Nov 2004 and on units don't have the relay for the rear window in them, the design was changed for some reason. You need to wire a relay in behind it. I have the guide (from another forum member), if you PM me your e-mail address I can send the guide to you. (Can't upload here as the file's too big!

Is there any chance you could give a clue on how to fit this relay please to enable the rear heated window to work. Cheers.