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In this video we have a look at 2005 Lincoln Town Car that the customer complaint is that the alarm system goes off at random times for no apparent reason. Let's see what we can find. -Enjoy!
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49 thoughts on “Lincoln town car: security alarm going off randomly”
  1. Avataaar/Circle Created with python_avatars Danny Collins says:

    I have a 03 Town car and my door ajar stays on constantly and my alarm goes off randomly sometimes so I don’t even arm it. I’ve disconnected the door sensor and changed my Driver door module and it’s still going off till the point I had to remove my dome light fuse so I want wake up to a dead battery.what could be the culprit?

  2. Avataaar/Circle Created with python_avatars Victoria Staeps says:

    Also, How can I find out if a Fuse is BLOWN for the Trunk…? Where is the Fuse for the Trunk to Pull Dow…? What kind/Type of Fuse too..?
    I have a 1995 Lincoln Town car Executive Series…!!

  3. Avataaar/Circle Created with python_avatars Victoria Staeps says:

    Question: What if the battery is Being Drained after Not Driving it after 2 Days, What would be my problem…?

  4. Avataaar/Circle Created with python_avatars John E. Carr says:

    Another great video.

  5. Avataaar/Circle Created with python_avatars Jon Barnes says:

    How can you tell if the problem is a door or other

  6. Avataaar/Circle Created with python_avatars J Goog says:

    So I'm guessing the hood lamp is what was draining the battery? I watched the whole video but may have missed that part of the diagnosis.

  7. Avataaar/Circle Created with python_avatars Vladimír Ruml says:

    Hello from Czech republic 🙂 thank you very much for this repair videos this Hood ajar issue has also my town car

  8. Avataaar/Circle Created with python_avatars house music says:

    Excellent assessment, I never thought it would be my hood but my car does the same thing every few days maybe when it's windy out the alarm goes on but I never thought it could be the hood but now I will definitely look into it and hopefully solve my problem, thank you

  9. Avataaar/Circle Created with python_avatars Hola! Chunky Savage says:

    My town car kept doing the same thing and it kept getting worse, thanks to your video, I jumped the hood pin and problem solved. I just want thank you for sharing these types of videos, I love all your videos btw. My hood pin was a weird switch attached to where the hood latches but nonetheless problem solved and the neighbors are probably happy! Lol

  10. Avataaar/Circle Created with python_avatars Bugga says:

    I know this video is very old but can you please help me ? I have Lincoln MKX 2010 4WD and the alarm keeps going off.

  11. Avataaar/Circle Created with python_avatars Everest Inspections says:

    Nice job

  12. Avataaar/Circle Created with python_avatars Michael O says:

    I really wish I saw this 10 minutes ago. My alarm went off twice tonight, And I just disconnected the battery. I had my battery on a trickle charger and the hood lowered but not latched. I think the wind was blowing pushing the hood up and down which would trigger that switch. Great video, thank you.

  13. Avataaar/Circle Created with python_avatars Alexander R. says:

    Hi. Can the hood switch just be disconnected?

  14. Avataaar/Circle Created with python_avatars Kaye Lind says:

    We noticed with my moms that if the car is locked and the temperature outside is cold, the alarm would go off.

  15. Avataaar/Circle Created with python_avatars RodMan DealerMan says:

    Fantastic information for me. I have an '03 Crown Vic, and had no idea that the hood was monitored with the alarm, or that the events were even stored. Electrical gremlins are a nightmare for anyone, but using your scan tool in this instance was a spectacular time-saver! Thank you sir!

  16. Avataaar/Circle Created with python_avatars masonbro 492 says:

    On a Lincoln Town Car 2004 alarm goes off randomly I took the fuse off so the alarm will go off but I still see the lights go off and my key fob stopped working and my dome lights come on randomly and when I hit the lock button the lever pops up again instead of staying down… took it to the dealer he sang that is my driver door module and it's going to cost me $1,000 to get it fixed is there a way I can get Take that alarm out and replace it with a wiper security alarm?

  17. Avataaar/Circle Created with python_avatars Nick Myers says:

    So I just had this problem on my 2007 Town Car. I do have ForScan which does have a data PID for this platform, that shows the last 4 recorded alarm events. Mine was also the hood switch.

  18. Avataaar/Circle Created with python_avatars Terry mcvicker says:

    I disagree with your motto
    "If I can do it you can do it"
    I can't do it.

  19. Avataaar/Circle Created with python_avatars Rodney Lawley says:

    The random security alarm on my 2003 Lincoln was caused by a different issue, but this video was very helpful when I started the initial trouble shooting process. In my case, a small leak in the air suspension was draining the battery while the car was parked more than usual due to the Covid lockdown. This issue was not initially apparent, as the car started fine with no indication of a depleted battery. I tested the battery anyway, and surprisingly, the battery was good but not fully charged. This low-charged battery issue apparently caused the driver-door switch to show ajar when the air-suspension engaged on the parked vehicle and weakened the battery below a certain threshold. My interior lights would also come on and fail to shut off while the vehicle door was closed. This was because the activated door-ajar sensor told the vehicle that the door was still open. After trying the WD 40 trick (quoted often on the Internet and Youtube) on the door latch mechanism, there was no improvement. But after charging the battery to 100%, the issue was resolved successfully. Also, if you do take the door panel off, the plastic retaining clips will break very easily, and they are (unfortunately) built into the main door panel and near impossible to repair once broken.
    I believe this weakened-battery issue is the cause of many random security alarms in the Lincoln Town cars equipped with air suspension. It certainly explains late-night alarms after the air pressure has depleted in the suspension. The auto repair shops can't find this issue because the air suspension leaks too slowly to initiate the problem while the vehicle is in their shop. I am making this comment in order to help others, as so many have helped me in the past. I appreciate this video and all of the great folks that are trying to help us save a few dollars whenever possible. All the best!

  20. Avataaar/Circle Created with python_avatars Terry Millburg says:

    Excellent video, always factual & to the point… If I were to replace that switch, how do you remove it? the wiring connector doesn't want to disconnect from it, & I'm not seeing an easy way to remove it from the mount? do I just need to remove the one screw & see the obvious on the under side? Keep up the great work sir!

  21. Avataaar/Circle Created with python_avatars Ted Harge says:

    My 2010 does the same thing. But you said something about what you did but you didn't show what you did. So I'm still confused. I do have an issue with my hood not closing all the way

  22. Avataaar/Circle Created with python_avatars Ruben Hernandez says:

    How much do pple charge for this? My 97 does the same

  23. Avataaar/Circle Created with python_avatars Donnie Robertson says:

    Great job

  24. Avataaar/Circle Created with python_avatars John M. says:

    I'm officially addicted to these SMA videos now. Thanks a lot! I hope you & Mrs. O are happy…Is there a support group to join? Does the SMA t-shirt help with my withdrawal symptoms, if I don't get my YouTube fix?

  25. Avataaar/Circle Created with python_avatars Nite Knight says:

    Nice.Thank you for the clear demonstration

  26. Avataaar/Circle Created with python_avatars Richard Bambenek says:

    When is a door not a door? When it's ajar. Sorry

  27. Avataaar/Circle Created with python_avatars newjerseybt says:

    I had a similar problem on my 2 week old brand new 2004 Dodge Ram 1500 pickup. Random horn sounding. The third time I brought it back for the same complaint I talked directly to Chrysler HQ. Chrysler called me back in about two minutes on my cell phone and told me the mechanics were presently working on it. I said bullsh!t, I told them I was presently sitting in another vehicle and was staring at my truck which was parked 100 yards down the road in the dealers used car lot. Needless to say they fixed it immediately by replacing the horn ring assembly and airbag which was attached to it. (according to them). Never went back to that dealer again needless to say. They went out of business soon after.

  28. Avataaar/Circle Created with python_avatars Chris Ninja says:

    What program is he running?

  29. Avataaar/Circle Created with python_avatars Chris Ninja says:

    My car does this too. I have to have my keys next to me all the time. It goes off when the temperature drops or raises as it causes things to shift when it swells or shrinks. I haven't checked which sensor it is yet. Other than this problem I love the car.

  30. Avataaar/Circle Created with python_avatars Les Faust says:

    I got a problem with my locks keep randomly locking while I drive,,,,it will set my alarm off randomly if is parked and locked….any idea???

  31. Avataaar/Circle Created with python_avatars Kenneth Moore says:

    sounds almost like a short some where in the electrical system

  32. Avataaar/Circle Created with python_avatars Joseph Pacelli says:

    My 04 Town Car does the same thing

  33. Avataaar/Circle Created with python_avatars Paul Thompson says:

    How did you hook your laptop to the car alarm system? I didn't see what you did there.

  34. Avataaar/Circle Created with python_avatars F.B 0 says:

    I see you fixed the problem temporarily but what would be a permanent fix? My siblings town car does this randomly, someone told me to have the anti theft system reset by the dealer, does that fix the problem also ?

  35. Avataaar/Circle Created with python_avatars LowMan Josh says:

    Omg this video might be the solution to mine the aftermarket alarm in my blazer kept going off its a viper system the hood pin (aftermarket was loose) i tightened it cause it was loose.

  36. Avataaar/Circle Created with python_avatars Larry Stephens says:

    How was this related to the battery going dead?

  37. Avataaar/Circle Created with python_avatars GNX157 says:

    Geez up there in NY winter that paper clip will last a week.

  38. Avataaar/Circle Created with python_avatars Ed Myers says:

    darn headlight housing is compromised or someone changed the bulb on the wrong day

  39. Avataaar/Circle Created with python_avatars Sean J. says:

    Hi. I have a 2004 Lincoln Towncar. Where could I find the alarm hood sensor in that model? My car's design is a little different than that 2005 model in your video.

  40. Avataaar/Circle Created with python_avatars 8power0 says:

    Thanks for this video , i always see cars with this problem the video was straight to the point and with no bs i really appreciate that thanks again .

  41. Avataaar/Circle Created with python_avatars ehsnils says:

    If I remember right – some later Subarus has a door switch that has two contacts, and one operates the dome light and the other operates the lamps in the door that illuminates the ground from the underside of the door. The "beauty" here is that the dome light can turn off but the floor lights in the door stays on "forever" draining the battery and burning out the bulbs eventually. Something to look for if you have a Subie with some strange current leak.

  42. Avataaar/Circle Created with python_avatars Scurfie says:

    Another 2005 car with issues. Lesson? Sell your car after 12 years.

  43. Avataaar/Circle Created with python_avatars A LeBlanc says:

    I really enjoy seeing the process you go through to narrow the problem down. Thanks Eric!!

  44. Avataaar/Circle Created with python_avatars Nigel Cummings says:

    Damn dude what don’t you do!!

  45. Avataaar/Circle Created with python_avatars Gavin says:

    Anyone else come here from bigclivedotcom's channel? Just subscribed, really interesting videos.