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Audi A4 B7 wipers/washer does not work

2K views 1 reply 2 participants last post by  Hoggy 
#1 ·
Hello,

I have problem with 2005 Audi A4 2.0 TFSI (BGB?) wipers and washer system. I dont know what tests should I do to exclude different options. No fault codes. Some day wipers and washer may work without problems but most of the days they dont work at all.

VCDS measure blocks says wiper switch is activating wipers and washer I think. I have already read that fuses at fuse box are unimportant thing when solving wipers and washer problem in these CAN BUS Audi models, am I right? Anyway, there is no voltage at fuses 36 or 37 (fuses are ok)
So my guess is:
-There is something wrong in wiring harness?
-One or several control module is broken?

I am not an electrician so its very difficult to try read wiring diagram without any experience what I am doing. Im afraid that I will break something.

If someone can tell me how wipers/washer system works that would be helpful, e.g where signal from wiper switch is going (8E0 907 279L????) and how voltage should pass till wiper motor or washer pump.
 
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