Question about 2000 Mercury Grand Marquis

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Inside lit cycles on and off when car is in the garage overnite and drains the battery, does not do it in the daylit, ford says i need a new keyless entry pad, what can i do that is cheaper.

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We had the same problem. You can remove the keypad by removing the inside door upholstery panel. The keypad module is held in with a sliding clip. Lots of harnesses etc to disconnect to get the thing apart , but the keypad came out fairly easily. You can open the keypad module by popping the clips around its perimeter. Inside is the rubber keypad button strip with a circuit board behind it. On ours there was oxidation on the circuit board. Carefully clean the circuit board with fresh water and a toothbrush (hopefully the traces haven't rotted through. If they have, you have to replace the module). Put the thing back together and seal the edges with a very tiny amount of RTV silicone to prevent further entry of water. This worked on mine, did the repair in August 2008.

Posted on Jan 01, 2009

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Leave the light on in the garage!

Posted on Dec 01, 2008


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