Hi,
4. Disconnect the battery. This option is a last-case scenario. Turn off your car and remove the keys. Two cords that power your car run up to the top of the battery where they are screwed on (think of the positive and negative connectors you use when you jump start your car). Use a wrench to unscrew the side nut of each connector. (Do the negative side first, and when you reconnect the battery put the negative side back on first.) You should be able to lift the connector up and off of the battery. This method is most helpful when you have a car alarm that is going off at night, or when you are not actively using the car.
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Temporarily disconnect the horn and consult a Professional key programmer.
SOURCE: car alarm will not go
If the car has a kill switch, this is causing your car not start because its connected to the ignition or starter. Sounds like the alarm system is defective. If it's aftermarket, you might want to take it back to installers. If it's factory, take it to the dealer. The remote ties into several features that require a trained technician to handle.
SOURCE: my 2006 hyundai sonata alarm keeps going off
One word:
Dealer.
Next time just disconnect the battery until you get it towed as this is a warranty item. I'll bet some wondered if this was a prank question like I did, right?
SOURCE: 2005 Hyundia Elantra alarm goes off for no real reason
When a battery starts to go bad it will set the alarm off constantly. Check the date on your battery and if it's between 3 and 4 years old most likely this is the cause. I had it happen before.
SOURCE: Want to install a remote starter in a 2008 Hyundai Elantra
your key does not have a "chip" or any other security device in key
SOURCE: ELANTRA ALARM PROBLEM
If the alarm keeps going off constantly and the remote has no influence on the alarm its most likely a connection problem. A hyundai dealer might be able to fix it but since you can start the car something you might be able to try is....
Check and make sure the remote battery is in the right way. Make sure all of the doors are closed, the trunk is closed, open the hood, connect the battery, close the hood all the way and try to lock and unlock the doors. Hope this works but if not, sorry it didn't work.
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