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Lillian Taylor Posted on Aug 20, 2017

The horn on our 2008 300 stopped working. One day coming back from store the alarm went off and even though I kept trying to turn it off with the key fob. Hasn't worked since

5 Related Answers

ginko

Ginko

  • 19396 Answers
  • Posted on Aug 19, 2008

SOURCE: car alarm preventing car from starting

Try removing the alarm system relay, some car alarm has also a fuse on the alarm that you can remove.
Many car alarms unlock by inserting and turning car key while you connect the battery.

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onyeredson

Paul W

  • 404 Answers
  • Posted on Dec 29, 2008

SOURCE: mercedes c220 ignition key stopped working

Hi! Sounds like the key needs to be coded again, take all relvant details i.e. chassis vin number, Registration document (Title) and key to your local Mercedes Dealership and hopefully they'll rec-code it for youor replace it.
Good Luck and a Happy New Year to You and your family.
Remember the blue FixYa button?
Paul 'W'

Anonymous

  • 1 Answer
  • Posted on Jun 04, 2009

SOURCE: car alarm preventing car from starting

I am having trouble also but I need to know how to disconnect the alarm. I would appreciate it if you could help me out seeing that you have disconnected yours. Thank you

Anonymous

  • 7 Answers
  • Posted on Sep 07, 2009

SOURCE: Audi A4 2003 Alarm Problem

There is a few things to do check the door switches that control dome lights, check wire down by the skid plate when you get oil changed there is a sensor for the starter there if it is stolen the alarm will go off or just take a BAT and BEAT the living **** out of your horn and call it good like I am going to. I hope this helped or will help I recommend an aluminum bat vrs. wood

Dan Kostella

  • 30 Answers
  • Posted on Jan 26, 2010

SOURCE: my car horn wont work and my airbag light is blinking.

The horn switch is in the airbag. You need to replace the airbag. I do not know if the airbag can disassembled to replace just the switch.

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Related Questions:

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1answer

How do I turn off honda 1998 horn. Security alarm system

try locking and unlocking the drivers door with the key. if it is a solid beeping your horn relay may be bad pull it and get one at parts store. they are cheap.
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Car alarm preventing car from starting

Try removing the alarm system relay, some car alarm has also a fuse on the alarm that you can remove.
Many car alarms unlock by inserting and turning car key while you connect the battery.
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Will not start because of the security system 1995 Toyota Previa

Aftermarket alarm??? Have it taken out and the vehicle put back to stock. Once those types of alarms get old they tend to fail
2helpful
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92 Toyota 4runner truck was running perfectly fine Later in the day went to start and the alarm just started going off and wouldn't turn off. Truck won't start even with keys turned in igniti

The alarm system somehow got activated , this is usually because the battery becomes discharged or disconnected try doing this:
Remove the key from the ignition
disconnect the negative battery terminal
put the key back in and turn to ON
exit the truck and leave door open
reconnect the battery terminal
get in and leave door open, if the alarm horn stays off it should start.
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Central locking has stopped working properly and I can not open any door other than the drivers door and that is with the key. This has been like this since the alarm went off on its own and would not...

The alarm will time out and turn itself off after a minute or two when it is tripped. This turns off the alarm, not just the alarm horn.

Are you saying that you can't unlock a door from the inside by hand?
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My 2001 Honda Prelude has trouble starting from time to time. Once a month or so. When this happens the Lights and radio work and do NOT dim, car doesnt even turn over theres NO Crank. I just wait a minute...

check to see if the tps sensor is sticking if it does stick it will not let you throtle come bach to the rest point and will not let you start unless you push the pedal to the floor and hold it turn the key
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1996 Dodge Avenger Security System went crazy now car won't start

try to put the key in the ingnition and turn it to the on possition and walk away for about 15 min come back turn it to off and see iff it starts
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My car horn randomly goes off while car is off?

The horn works by earthing, normally done by you pressing switch, if the horns wire or the internally creates a contact to earth(chassis) your horn will sound. Take your switch apart on you steering wheel & give it a clean.
Hope this helps, if not, remove wire at horn end, leaves you with no horn but peaceful nights.
Have a nice day.
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98 celica battery went dead replaced now it want crank

Try this: Unhook the battery. Reconnect the battery. When the horn starts to beep, cycle the ignition key in the ignition on-off 5 times. This resets the alarm; the cycling of the key. Please advise me if this works for you.
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