* Key Fob Battery: The most common cause. A weak or dead battery in your key fob will prevent you from disarming the alarm properly. Replace the battery in your key fob.
* Key Fob Malfunction: The fob itself might be broken. Try the spare key fob (if you have one). If the spare works, you need a new key fob.
* Alarm System Malfunction: The alarm system itself might have a fault. This is less common but possible.
* Accidental Activation: Something might be triggering the alarm (e.g., a slightly open door, a hood latch not fully closed, a faulty sensor). Carefully check all doors, the hood, and the trunk for anything that isn't completely shut.
* Aftermarket Alarm: Is there a possibility a previous owner installed an aftermarket alarm system in addition to (or instead of) the factory one?
Troubleshooting Steps:
1. Check the obvious: Ensure all doors, the hood, and the trunk are completely closed.
2. Try the spare key fob: If you have a spare key fob, try using that to unlock and disarm the alarm.
3. Replace the key fob battery: This is the most likely solution. Get a new battery (CR2032 is a common type) and replace the battery in your key fob. Look for instructions specific to your key fob model.
4. Check the car battery: A weak car battery can sometimes cause issues with the alarm system. Check the voltage of your car battery.
5. Disconnect the battery: As a last resort, you can disconnect the negative terminal of your car battery for about 30 minutes. This will reset the car's electrical system, including the alarm. Be aware that this will also erase any presets in your radio. Reconnect the battery after 30 minutes and try again.
If none of these steps work:
You'll likely need to take your car to a qualified mechanic or an automotive locksmith. They have specialized tools and knowledge to diagnose and fix alarm system problems. Mention that it's a 1996 Chrysler Sebring convertible with a factory alarm issue.
Remember safety first. If you're dealing with a persistent alarm, and you're uncomfortable working on your car's electrical system, seeking professional help is the best option.
