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It seems like the 1998 grand marquis key-less entry model was the only model made where u would actually have to take to a dealership to have it program there as it requires a computer module to program it.. unlike the rest of all models where u would be able to program you're self.. with the key and keyless entry pin pad those procedures just wold not work on the 98 model.. have tried it out... and it not work..

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14y ago

What else can I help you with?