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Possible key cylinder is bad, you have the wrong key, you have a very worn key are the first things that come to mind. Try another key. Try to pull clockwise or counter clockwise on the steering wheel and turning the key at the same time.

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โˆ™ 2007-08-17 01:59:22
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Q: Why would you not be able to turn the key in your 1989 Mercury Grand Marquis?
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