Question about 1990 Chevrolet C1500

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My 1991 chevy silverado wipers work sometimes and sometimes they don't. i can't figure it out. how do i fix the problem so they always work?

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  • Expert
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Sounds as though you have a short lift hood and and giggle wires going to wiper mot-er while wiper switch is on if it starts that means you have a short. If not replace wiper motor.

Posted on Sep 17, 2010

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  • Chevrolet Master
  • 17,129 Answers

It can be that the wipe motor is faulty if there is power when the wiper switch is on.
The wiper motor assembly must be removed and taken out to check the motor brushes and commutator.
Use a brush with petrol to clean , clean the brushes and seat them to have perfect contact with the commutator. Use a fine emery paper to clean the copper to shine.
reset and test before your set it back. If brushes are bad replace, but if commutator is bad the motor must be replace.
Hope all connectors/connections and wiper switches were checked before the motor was removed..

Posted on Sep 17, 2010

  • Dolcett Dec 19, 2010

    If they work at all, EVER, it isn't the wiper motor - it's most likely the board. Very common for this year.

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