Question about 1997 Mercury Grand Marquis

1 Answer

I purchased this car from a guy and now he is trying to take the car back. Last nite he opened my car and started my car trying to take it. I need to change the code on the car how can I do this.

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Mercury Master
  • 5,522 Answers

The reset use to be enter the old number, hold #9 key while bumping #7 key once, then enter new code#. You could check with a Dealer on that though. You would need to rekey the Ignition and Security Brain for the Keyswitch.

Remember, getting into the car is only part of it. If the old owner has a old Key, he/she could break a window and just use the key to drive away. For that matter, the doorlock can be opened with the old Key and you do not need a Keypad combination.

You have several choices, take it to a Dealer and have the Ignition resequenced with new keys, add an Alarm, independent of the Factory Alarm, or talk to the Police. Bad part about resequencing the original Antitheft is the doors will still open with a Key. The car just would not be driveable, but anything inside the car and trunk could be taken.

An Independent alarm with Remotes will go off if any doors or the trunk is opened, which is much better, but sometimes killing the Ignition with a second alarm will interfere with the original. You can either scare the old owner away or force a confrontation with what you do next.

There are also "Silent Alarms" which page you when your vehicle is being messed with. You stay friends with the neighbors without waking them up and if you have a switch to disable the siren, you can have both a Silent and an Audible alarm from the same system.

I hope my solution is very helpful to you.

Posted on Apr 09, 2011

Testimonial: "Thank you so much for the solution. The police will be notified and an alarm also will be put on the car. I really appreciate the advice!!!!!!!"


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a 2002 dodge ram 5.9. Its been running just fine last time it snowed my gas lines froze up i put heet in it and it started a while later but this time i put two bottles in it and its still not...

will need more information, how strong is the battery? have you remover the air cleaner, to check air flow, to run you have to have oxygen fuel and spark, all in the proper portions, Winter temps can often cause paper air cleaners to absorb moisture, then freezing temps, block airflow. what type of fuel system, efi, or carb throttle body are we talking about? Carb or throttle body you can introduce a few drops of fuel in the top (caution do not use much a teaspoon or so from a small open container as vapor is explosive!

Apr 16, 2017 | Dodge Cars & Trucks

1 Answer

Car cranks but wont start

It probably won't be anything simple. It should have generated some codes by now so I would get an OBD2 code reader and follow the instructions and find out what the codes are and post back.

Apr 16, 2014 | Chrysler Cirrus Cars & Trucks

1 Answer

Since it got freezing last nite & now it won't

If the engine will not turn over very fast,it is most likely your battery.Cold weather will kill a weak battery a lots of times.

Dec 29, 2012 | Cars & Trucks

1 Answer

Hello, I have a 2004 pontiac grandam and it's a 4 cylinder and the security light has been on for over 2 weeks steady, but my car has been starting, but last nite while starting it stalled alittle and

If the security light is on, it can only be one thing. This light indicates a failure in the antitheft system that will eventually lead to your car refusing to start or continue running. Here is a link with alot of info, plus ways to beat this problem.

Nov 25, 2011 | 2004 Pontiac Grand Am

1 Answer

I have a 2000 Hyundai Elantra. i live here in Wi it Snow last nite. my car sat last 2 day with out running. this morning after clearing the snow off the car and started it up it started too sputter. only...

It sounds like you have a vacuum leak or a stuck EGR valve. Check all the vacuum hoses to see if it will straighten up. You can pinch them off with a pair of pliers as close to the intake plenum as possible to see if it starts idling better. PCV hoses are also known to get large holes in them and can be a little tough to diagnose if you do not know what to look for.

Dec 22, 2010 | 2000 Hyundai Elantra

2 Answers

Bad battery or alternator

check alt fuse, check from alt positive post to battery make sure you have 14 at alt and close at battery also if you ran battery down a few times may need to be checked and or charged that and dont be fooled some alternators that are rebuilt just had a little part here or there replaced ya might have got a bad one

Jul 31, 2010 | 2002 GMC Envoy XL

1 Answer

Car window goes down but roof not comeing down.

ok guys here we go first let me started out by saying this.the orther nite i try opening up my top the window goes down and i hair a noise coming from the trunk, the next day i took the panels off from the trunk,man thats alot of screw youu got to take off to get to the pump area. the first thing i notice was the emty oil tank, so i add some jack oil to it, while going back up with every thing i broke the track but that was not a problem, there is a small switch at the rite side of the track, i took a small paper clip and short it closed and thats how l slvoed my problem.

Oct 17, 2009 | Mercedes-Benz CLK-Class Cars & Trucks

2 Answers

Isnt starting when it gets below 35 degrees

maybe you need a blockheater put in it that you could plugin at nite when it is cold

Nov 17, 2008 | 1997 Mercury Mountaineer

Not finding what you are looking for?
1997 Mercury Grand Marquis Logo

287 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts


Level 3 Expert

76164 Answers


Level 3 Expert

5522 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Are you a Mercury Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides