Question about 1993 Mercury Grand Marquis

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1993 Mercury Grand Marquis with 46000 miles. Fuse 9 blows after about 20 minutes of driving with the lights on. Any suggestions?

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  • billpet_2000 Aug 22, 2010

    Thanks, but the diagram is unreadable.. could you send a larger one or point me to the source?.. thanks

  • billpet_2000 Aug 23, 2010

    Found it!... pinched wire in tail light... disconnected all loads and put back one at a time...thanks



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1993 Mercury Grand Marquis with - 6283dec.gifHeres the wiring diagram.

Posted on Aug 22, 2010

  • Susan Price Aug 22, 2010

    wiring diagrams are copy protected/ If you need a clearer picture you can to mitchell1diy. Also there is no way to tell if the problem is your switch, a wire touching metal, your head or tail lights. All you can do is turn the lights on in the daytime and and start unhooking one component at a time till the fuese does not blow. Something is shorting out but its not a dead short since it takes time to pop. This would lead me to believe its your daytime running or lighting switch over a problem with the lights. But if moisture were to get in the light connections that too would cause a delayed fuse popping issue.



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Fuse 9 blows after about 20 minutes of driving with the lights on. Any suggestions?

do you have aftermarket headlights with too high a current draw?

What does the owner manual say fuse 9 portects?

Aug 22, 2010 | 1993 Mercury Grand Marquis

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I can provide a fuse box diagram of a 96, it is the same, here is a link to that manual from a Ford site. U want to look at page 273

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