How do I disable the alarm on my 1998 Mercury Grand Marquis so I can start my car?

Asked by Scott Mar 02, 2014 at 12:32 AM about the 1998 Mercury Grand Marquis

Question type: Maintenance & Repair

I have a 1998 Mercury Grand Marquis, it's been sitting for about a month now, and the battery died.  I have a jumper pack and when I hook it up everything works fine (radio, lights, etc.) but as soon as I turn the key to the run position, the alarm goes off.  As long as I keep the key in the run position the alarm continues, then a couple second break, then continues, and the car won't even try to start.  I tried unlocking the driver door, passenger door, and trunk with the key (it's the fat black security chip one) which I was told should disable the system, but no luck.  Any help would be much appreciated, I can't take it to get it looked at since I can't get it started.  I had the fob and hitting the unlock button used to disarm it but I can't find the fob and I've looked EVERYWHERE.

5 Answers


No offense or derogatory statement intended but you will find that moat of us here on this forum will not advise on how to defeat a security or safety device. If it is an OEM alarm system your local Ford, Lincoln, Mercury dealer can help you (but by your description, I don't think it is). If it's aftermarket, there's no telling what needs to be done to correct the concern. My apologies.

6 people found this helpful.

None taken, thanks for letting me know, it's really weird and I feel like the same thing happened a while ago but I don't remember how I fixed it. I did think of one thing, do the security chip keys run on a battery that might need to be replaced? Maybe it's not sending the signal to the alarm system because of that... I'll try calling the dealership too.


You sound stupid, Tracy. If a person needs help they need help. The fact that a negative path to walk down came into your mind because of this question says way more about you than the OP.

2 people found this helpful.

IwiLLoften - OK Troll: As a licensed and ASE Master Certified technician that's been in the field for 30+ years - I know what the Hell I'm talking about. I'm sorry that you can't tell the difference between straight-forward advice and sarcasm. You need counseling.

1 people found this helpful.

Tracy. You are a good mechanic but this man needs help. If he was up to no good he wouldn't be on a forum . Just don't reply if that's all you have.

1 people found this helpful.

Your Answer:

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 522 nationwide Grand Marquis listings starting at $1,800.


Sell Your Car Yourself

With a simple, secure transaction.

1998 Mercury Grand Marquis

I have a different car

CarGurus Experts

  • #1
    Tracy Hooks
  • #2
  • #3
View All

Know more, shop wisely


Related Models For Sale

Used Lincoln Town Car
18 Great Deals out of 630 listings starting at $2,888
Used Ford Crown Victoria
9 Great Deals out of 348 listings starting at $1,900
Used Toyota Camry
1,366 Great Deals out of 38,749 listings starting at $1,877
Used Honda Accord
1,195 Great Deals out of 42,071 listings starting at $1,023
Used Ford F-150
3,917 Great Deals out of 103,592 listings starting at $2,500
Used Ford Mustang
491 Great Deals out of 17,482 listings starting at $2,600
Used Chevrolet Tahoe
717 Great Deals out of 16,088 listings starting at $2,695
Used Cadillac DeVille
429 listings starting at $2,495
Used Toyota Avalon
150 Great Deals out of 3,687 listings starting at $2,195
Used Chevrolet Silverado 1500
2,988 Great Deals out of 80,685 listings starting at $2,550

Used Cars for Sale

2011 Mercury Grand Marquis For Sale
13 listings starting at $4,995
2010 Mercury Grand Marquis For Sale
45 listings starting at $2,600
2009 Mercury Grand Marquis For Sale
26 listings starting at $3,999
2008 Mercury Grand Marquis For Sale
5 Great Deals out of 54 listings starting at $3,100
2007 Mercury Grand Marquis For Sale
22 listings starting at $3,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.