Here's a breakdown of how to approach troubleshooting:
1. Identify the Anti-Theft System:
* Factory System (Passlock/VATS): This system uses a resistor in your ignition key to verify its authenticity. If the key is damaged, the system can be disabled. Issues typically manifest as the car not starting or cranking slowly. A malfunctioning Passlock system usually doesn't trigger an alarm.
* Aftermarket Alarm System: This is a separate system added by a previous owner. It often has a key fob and may include features like remote locking/unlocking, a siren, and potentially other sensors. Problems typically manifest as the alarm randomly sounding, the car not starting, or remote functions not working.
2. Troubleshooting Steps:
* Factory System (Passlock/VATS):
* Try a different key: If you have a spare key, try that. A faulty key is the most common culprit.
* Check the ignition switch: A faulty ignition switch can also interfere with the Passlock system. This requires professional diagnosis.
* Professional Diagnosis: If the spare key doesn't work, you'll likely need a professional mechanic or locksmith familiar with Passlock to diagnose and potentially reprogram the system. This often involves specialized tools. They may need to replace the ignition switch or the Passlock module.
* Aftermarket Alarm System:
* Check the alarm system's manual: If you have the manual for the aftermarket alarm, look for troubleshooting steps, including reset procedures or ways to disable the system. This is the best place to start.
* Locate the alarm system's control unit: Often found under the dashboard or in the glove box, this unit has switches and/or jumpers that might allow you to reset or disable the system.
* Disconnect the battery: As a last resort, disconnecting the battery (negative terminal first) for about 15-20 minutes *might* reset some aftermarket systems, but it's not guaranteed to work and may erase other vehicle settings. Reconnect the battery.
* Professional Installation: If you're unsure about working on the aftermarket alarm, contact a car alarm installer. They can help diagnose and resolve the problem safely.
Important Considerations:
* Never attempt to bypass or disable an anti-theft system without knowing exactly what you're doing. Incorrectly tampering with the system can damage your car's electrical system and further complicate the problem.
* If you're not comfortable working on your car's electrical system, seek professional help. A mechanic or locksmith is the best resource to address anti-theft system issues.
Because there is no universal "reset" button, providing specific instructions isn't possible without knowing the exact type of anti-theft system in your Cavalier. Start by carefully examining the car and any documentation you have. If all else fails, professional assistance is necessary.
