Wiper Motor Relay

[Monzta]

Can anyone please tell me which of these relays is the wiper motor one?

 

[pauldazzle]

I don't think the A4 B6 has a wiper relay.
IIRC, the column switch connects to the steering column control module, & that sends wiper operating commands from the lever switch, to the Central Electric Control Module via a CAN buss network connection.

 

[pauldazzle]

Most common cause of A4 wiper failure is the linkage siezing up.

 

[Monzta]

Thanks for that info @pauldazzle .

I fitted a replacement linkage/motor today and nothing happened, totally dead so thought that the relay must be at fault. Not sure where to go next with this now.

 

[pauldazzle]

CCM hasn't got wet by an chance? If the Plenum chamber grommets get blocked up or the ECU rubber seal fails it can cause all sorts of electrical chaos.

 

[Monzta]

By coincidence, I am having issues with my ECU at the moment, (see my other post here https://www.audi-sport.net/xf/threads/a4-starts-but-immediately-stalls.399685/). The wipers packed up one day the week before last and a few days later the starting issue ground me to a halt. You reckon they could be connected?

 

[pauldazzle]

Yeah, could well be connected. If water has got into the CCM you're going to have many issues.

 

[Monzta]

The CCM or the ECU???

 

[pauldazzle]

Both.

 

[Monzta]

Damn. I'm sure water is the root of my problems though. My wipers packed up after a heavy, sustained downpour.

 

[Monzta]

Well it looks like i have had some water ingress in the Control Convenience Module. Time to buy a new one then.

 

[pauldazzle]

That doesn't look good at all.

 

[Monzta]

And that's after I'd cleaned it up. It was a lot worse when I first took the cover off.

 

[pauldazzle]

No wonder your electrics were playing up.

 

[Monzta]

Indeed. If I can get this fixed and my wipers working then I can get back to the original problem of the car stalling after starting. The joy of wet Audis.