Question about 2003 Mercury Grand Marquis

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I have a 2003 Grand Marquis. The wipers come on

I have a 2003 Grand Marquis. The wipers come on randomly and won't shut off. I am told this is a problem with the wiper motor. Something inside that tells the motor to shut of is not functioning properly. Is this correct?

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It is part of the problem. The turn stalk in the column also has the wper control. The Autoturn OFF is in the motor. Usually this is a set of contacts or a small box plugged directly into the wiper motor. The small box works the delay feature but can also short and continue to run.

If your wiper has a removable cover you can spray WD40 on it and it may straighten out. If you see the small box, unplug it and see what effect it has. You may need to spray its contact terminals and the mating surfaces it plugs into.

Finally you can back off on the wiper mounting screws, spray WD40 and retighten. Sometimes the motors will lose their ground for the AutoOFF feature.

The turn stalk can also create your problem. Tighten its mounts after removing the plastic column cover.

Posted on May 29, 2010


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