Hi Sjonnie,
I'm battling a problem with my rear wiper (V70 '04) and have found many postings about the wiring being faulty (runs through the left hinge).
My wiring was excellent, so I continued to search and have so far found that the gears and arm of the wiper have too much friction.
I have yet to find a solution, but if your wiper fails again, try to listen if you hear a slight clicking noise coming from inside the wiper-assembly. Sounds very much like a relay switching.
If you do hear this: it's a current limiting sensor build in by Volvo to prevent the motor (and/or fuse) from burning. It heats up due to too much current being passed and it switches off. When it cools down, it will give it another try, but will switch off again, etc.
I will continue to post any progress I make onto all Volvo forums (3 so far) I find, as there have been many people who have this problem, but the solution is not often included...
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