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How do you reset antitheft system on 1995 Lincoln town car?

There's no single "reset" button for the anti-theft system on a 1995 Lincoln Town Car. The system is integrated into the car's electrical system and relies on several components working together. If the anti-theft system is activated, it's usually because something is interfering with the normal operation of the car's computer system.

Troubleshooting steps to address a seemingly activated anti-theft system (which manifests as the car not starting or experiencing electrical issues) include:

* Check the Key: Make absolutely sure you are using the correct key. A faulty key fob, or a key that isn't properly programmed to the car's system can trigger the anti-theft system. Try all keys you possess.

* Battery Voltage: A weak battery can cause all sorts of electrical problems, including triggering anti-theft measures. Have the battery voltage tested. A low voltage may not register on a simple voltage check, but a load test will reveal if the battery is failing under load (like when trying to crank the engine). Consider replacing the battery if it's questionable.

* PATS System (Passive Anti-Theft System): This is the likely culprit. The PATS system uses a transponder chip in the key to communicate with the car's computer. If this communication is disrupted, the car won't start. Issues could stem from:

* Faulty Key: The transponder chip in the key could be damaged. A replacement key from a locksmith or the dealership that is properly programmed is the solution.

* PATS Receiver: The receiver in the car that communicates with the key's transponder might be faulty. This would require a professional diagnosis and repair. It's located within the steering column area, usually near the ignition switch.

* Body Control Module (BCM): The BCM is the brain of the car's electrical system. If the BCM has a fault, it might interfere with the PATS system. This is a more complex issue requiring professional diagnosis and potentially replacement.

* Alarm System (if equipped): If your Town Car has a separate aftermarket alarm system, it might be malfunctioning and interfering with the starting process. Disconnecting the alarm (temporarily, with professional help if needed) can help determine if it's the cause.

Important Note: There are no simple "reset" codes or procedures for the 1995 Lincoln Town Car's anti-theft system that you can easily find online. Attempting to bypass or disable the anti-theft system without proper knowledge could damage the car's electrical system or even be illegal.

What you should do:

If you've tried the basic troubleshooting and the problem persists, take your 1995 Lincoln Town Car to a qualified mechanic or a dealership service center. They have the tools and expertise to diagnose the problem and repair the PATS system or any other related issues properly. Don't attempt to "reset" it yourself unless you have extensive automotive electrical knowledge.