2006 BMW X5 3.0i. Rear wiper motor literally broke into pieces presumably as a result of struggling against ice. No problems with the rear wiper motor leading up to this failure. Ordered a used rear wiper motor and installed it. Still doesn't work. Checked both fuses as good. There is power at the plastic connector for the wiper motor assembly and the ground checks out good as well. I don't believe there is a relay for the rear wiper motor. All other aspects of rear hatch work fine (defroster, lights, locking mechanism, washer pump). I cycled the wiper stalk at the steering wheel with still no operation of the rear wiper motor. At this point I suspect it could either be a defective used rear wiper motor or possibly a defective switch at the stalk. I see no burn marks, smell nothing that would suggest an issue with the circuit board at the wiper motor itself. Does anyone have any advice or suggestions?
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