Wiper fault - not in the Wiki

[silverbullet]

I know that this is a classic fault and I should know the answer, but it's been so long since I had any wiper problems I've forgotten the solution...
OK. One click down for intermittent, sometimes (very rarely) works. Usually just goes wipe#click#wipe#click at usual slow speed. I can hear the relay clicking between every wipe.
Up two positions to slow wipe, nothing.
Up again to fast and that works ok.
Switch off and it parks with the blades about 20 dgrees above horizontal. Same for wash/wipe, parks in the wron place.
So...more than one fault or just a dicky front wiper relay?

[Simon Baxter]

Motor relies on the slow speed working for it to park.
Intermittant is also on the shunt winding.
When your on high speed and turn it off it slows down to the shunt winding then parks.
If the motor is knacked and the low speed doesn't work then it will never work on intermittant nor will it park.
Try a relay but suspect the motor is kerfurtled.

[silverbullet]

Thanks Simon. I need to take the dash out to fix a loose connection on the weird Audi 80 heater controls anyway...might as well make the job worthwhile

[silverbullet]

Swapped the relay and normal wiper service is resumed

[HarryMann]

Good question Ian & top advice Simon - thanks.