Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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ERNEST CLARK
AUTOMOTIVE REPAIR CONTRIBUTOR
1,730 POSTS
You can see if there's something binding the linkage or if the blades/linkage is cought up on something first. If there's power reaching the wiper motor and there's nothing blocking the linkage, then the motor is bad.