Question about 1997 Mercury Grand Marquis

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Reset lock code on door

Need to change lock code on door

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You must first put in your code then hold down the nine (9) button and push the seven button once. you should hear a lock sound enter your new code. Wish I had the code to mine.

Posted on Feb 20, 2014


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17. Remove the code ROM from the wireless door lock ECU and
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