# 1999 Pontiac Grand Prix - Wiper issue

**URL:** <https://community.cartalk.com/t/1999-pontiac-grand-prix-wiper-issue/141962>\
**Category:** Maintenance/Repairs\
**Tags:** pontiac\
**Created:** [June 10, 2019, 1:19pm UTC](https://community.cartalk.com/t/1999-pontiac-grand-prix-wiper-issue/141962 "2019-06-10T13:19:38Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![doug6088\_153108](https://avatars.discourse-cdn.com/v4/letter/d/e9a140/32.png) [@doug6088\_153108](https://community.cartalk.com/u/doug6088_153108)\
**Post date:** [June 10, 2019, 1:19pm UTC](https://community.cartalk.com/t/1999-pontiac-grand-prix-wiper-issue/141962/1 "2019-06-10T13:19:38Z")

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My wipers have developed a problem. Sometimes, after use they don’t return to park, sometimes they do. They will begin operating without any switch action, making one or multiple cycles, sometimes stopping in the parked position, sometimes not. They cycle intermittently whether in park position or not. The wipers perform as commanded by the switch controls. I have connected ground from battery directly to wiper motor. Doesn’t resolve problem.

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [June 10, 2019, 1:25pm UTC](https://community.cartalk.com/t/1999-pontiac-grand-prix-wiper-issue/141962/2 "2019-06-10T13:25:47Z")

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I’d say you have a bad “park” switch inside the wiper motor assembly.Replacing the wiper motor should fix the problem.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [June 10, 2019, 7:39pm UTC](https://community.cartalk.com/t/1999-pontiac-grand-prix-wiper-issue/141962/3 "2019-06-10T19:39:58Z")

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That can be caused by a defective wiper motor pulse board.

[https://www.rockauto.com/en/catalog/pontiac,1999,grand+prix,3.8l+v6,1357141,wiper+&+washer,wiper+motor+pulse+board+module,8865](https://www.rockauto.com/en/catalog/pontiac,1999,grand+prix,3.8l+v6,1357141,wiper+&+washer,wiper+motor+pulse+board+module,8865)

Tester