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Ford Crown Victoria/Mercury Grand Marquis: Keyless Entry

39 messages,  Last post on Oct 22, 2008 at 5:35 PM

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What is this discussion about? Ford Crown Victoria, Mercury Grand Marquis, Sedan

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#30 of 39 Re: John [marsha7] by billw_willy Jan 16, 2008 (10:47 pm)
Replying to: marsha7 (Nov 25, 2005 7:00 pm) The unlock number is also under the hood but I don't know exactly where. If you can find it, that will save $25 and you'd hate to pay them to look under the hood! I just bought my dad's 99 MGM with 50K miles and it needed $500 repair to replace a part to operate the heating system door; the labor was high due to removing the entire dash. Now, I have my unlock code but the keypad is inoperative, won't light up or unlock the door. Replies to this message: woodinva (Feb 25, 2008 3:03 pm)
#31 of 39 Re: John [billw_willy] by woodinva Feb 25, 2008 (3:03 pm)
Replying to: billw_willy (Jan 16, 2008 10:47 pm) Look on right side hood hinge, should be a small white sticker with the code.
#32 of 39 Re: GM door code by medicleo May 13, 2008 (11:09 am)
Replying to: marsha7 (Nov 25, 2005 6:38 am) I bought the "secret" on eBay - dismantled the driver's door only to find that on my 2007 GM the door code is no longer printed on the part number label on the model, which on the 2007 GM is in the lower front edge of the driver's door. There were no other labels in any of the other reported places like hood hinge, trunk etc although these may have been removed as mine was a former rental vehicle.   My local Ford dealer wanted $55 to plug in their computer and read the code.   I have determined that the code is a five-digit number, that is fixed by module, and IS NOT a default number like 12345 on every module. (Logic says that would mean that anyone who knows the default code could open every vehicle without keys) You need the fixed primary code to be able to enter or delete secondary user entered codes.   Pressing 7/8 and 9/0 simaltaneously will lock all doors and test that the keypad is working.
#33 of 39 Re: Crown Victoria dome lights come on by them selves [dan109] by silvereye Jul 01, 2008 (6:23 am)
Replying to: dan109 (Oct 18, 2007 11:10 am) Did you get this fixed, how? My dome- lightand keypad light up by themselves with just a slight noise next to the car, it must be shorting to a pad, and the pad does not always wotk either....I found some on e-bay but want the right part number for my 99 MGM.   Pete
#35 of 39 Car Won't Start After Short Trip by gobig Sep 27, 2008 (1:19 pm)
I have a 1998 Grand Marquis. When I first go to start my car after it's been sitting over night it starts right up. I'll drive for a few miles then park and turn off the car. When I come back 20 minutes later I'll turn the key and the battery will kick in but when I turn it further there is nothing. The engine doesn't turn over at all. What I usually do is open the hood to "cool" the engine more quickly. I'll get out of the car and lock it via the key pad. I'll wait a few minutes then enter the car via the keypad. When I try again it kicks in and starts normally.   The only thing I can think of is in the past I couldn't get my key fob to work. A dealership said they key pad module wasn't good and that's why they couldn't get the key fob to work.   Is there a chip in the key that communicates with the key pad module? If that communication is broken the care won't start? Has anyone heard of that before? I can't think of anything else that would cause my no start behavior. Thanks in advance for you help! Replies to this message: silvereye (Sep 27, 2008 1:44 pm)
#36 of 39 Re: Car Won't Start After Short Trip [gobig] by silvereye Sep 27, 2008 (1:44 pm)
Replying to: gobig (Sep 27, 2008 1:19 pm) sure, the key has a chip in it, but unless the key is getting hot, if it works once , then again later, it is not the program in the key....Check your brake lights when the car wont start..if they are not working your safety interlock multi-contact switch in the steering column could be the problem....it started acting intermittant on me and all sorts of goofy stuff happened...If you have a check engine lite on you should get someone with a reader to get the code number ,,usually a used car dealer will have a hand-held unit for fixing the stuff on thier own lot, but they wont try to soak you like a dealer would....Remember, the weather is starting to turn, and batteries get old before you know it, if the car has good compression, and gets warm then a weak battery may not turn it over until it cools, check your battery terminals, clean them with baking soda and water, then after you re-assemble them, cover them with a light..(very light) coat of oil. also check the battery acid level, only use distilled water to top the up, as even maintainence free batteries sometimes get low on liquid, especially after this dry summer... Good luck
#38 of 39 Re: Car Won't Start After Short Trip [silvereye] by gobig Oct 04, 2008 (2:56 pm)
Thanks for the tips. I don't have a check engine lite. I'll check the break lights and the battery. Thanks for the help! I appreciate it!
#39 of 39 96 grand marquis Keyless Entery by cobrass Oct 22, 2008 (5:35 pm)
I just bought a 96 Marquis LS and It was in the owners manual a white card with the code on it. and there's a way to change to your favorite in the manual.   mine was easy plug number and open car.   Thanks\ Sam,

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