Question about 2003 Mercury Grand Marquis

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2003 Grand Marquis Headlights

Headlights come on/off sporadically. When on "automatic" inside garage when its dark enough for them to come, they will come on and stay on for a few minutes, then go off--but parking lights remain on. At this point, can go to "manual", and they won't come on. Let the car sit for 30-45 minutes, and they will come on manually or automatically, but once you turn them off, they won't come on again. All other lights work -- turn signal, passing high beam, emergency flashers, brake lights, dome lights.

All fuses have been checked. A new signal lever switch (on column) has been installed. Light Control Module replaced. All with same results. Could it be a relay or light switch on the dash? Help!

Posted by Anonymous on

  • Anonymous Jul 27, 2008

    New Light Control Module solved problem

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The recommendation above is strongly sound well but, before psending big amount of money to replace the lighting controller it is better to check the wiring connection of the existing one since i had the same problem, and after i aligned the connection wires, lights became healthy and functioned well.

Abdulatif R Talalawah

Posted on Apr 17, 2010

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My mechanic says it's the Electronic control module. He's about to replace it for $700.00

Posted on Sep 23, 2008

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SOURCE: 2003 Grand Marquis Headlights

New Light control moduel solved problem

Posted on Jul 27, 2008

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Good luck.

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2003 Grand Marquis Headlights


New Light control moduel solved problem

Jul 20, 2008 | 2003 Mercury Grand Marquis

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