Buick Repair Questions? Ask a Mechanic for Answers ASAP
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Most common to cause this fault here that I have run across several times before is the wiper motor assembly itself.It houses the internal control board electronics that shut down the wiper motor.There is a chance the wiper switch is at fault instead but most common is the wiper motor needing replaced.Below are the diagnostic procedures on how to test this to make sure it is the motor at fault or to see if the switch is at fault.
Here is the diagram info for the wiper system.
The cost I show for the wiper motor from a dealer is around $350 and less then an hour to replace.You might be able to get the motor cheaper from a salvage yard or local parts store.
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