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You have a bad sensor in one of the doors, all 4 will have to be checked. Check at you local dealer for the part. In the meantime, just pull all the bulbs out so as not to drain the battery.

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Q: Why do the fading interior lights on your 1999 Mercury Grand Marquis keep coming back on causing the battery to run down?
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Why do interior lights in 1999 Mercury Grand Marquis intermittently come on after engine and headlights are turned off causing battery failure?

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