Dec 24 2008
Rear wiper motor runs soon as engine is running , and will not turn off
Question:
Rear motor stays on , will not turn off , tries all stalk positions . Have removed rear plastic liner , and must disconnect the wiper / pump to get it to stop on my 2004 Audi A3
Answer:
Your symptoms are consistent with a failed wiper motor relay. I replaced one for this very symptom last year. It is located on the central electric relay panel in positions V & VI (double relay). If you remove the under dash panel above the driver’s feet, up to the left you will see a relay panel with many relays. Along the bottom edge you will see a half dozen bolts with wires attached. In the first row of relays above this it will be the last relay to the right. I believe it’s the only double relay in this row. Being a European model not available in the States I do not have the electrical schematic for this year model. It is however in the same location for a 2004 A4 and VW Golf, so it is likely in the same location. To confirm it’s location and source of the malfunction, if you unplug it and the wipers stop, it is likely the cause.
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