What you likely want to do is one of the following, depending on your problem:
* Reset the PCM (for engine-related issues): This usually involves disconnecting the negative (-) terminal of the battery for a period of time (at least 30 minutes, sometimes up to an hour). This allows the PCM's memory to clear. Reconnect the battery afterward. This will reset learned parameters like idle speed and fuel mixture. Caution: This will also clear your radio presets.
* Deal with a specific problem: If you have a specific problem (e.g., check engine light, malfunctioning electrical component), simply disconnecting the battery might not be sufficient. You'll need to diagnose the issue first. A code reader (OBD-I scanner for a '95 Taurus) can help determine what the problem is.
* Other modules: Other control modules in the car might have their own reset procedures, but this is less common for a car of that era.
Before attempting any of these:
* Consult your owner's manual: It might contain specific information about resetting systems or troubleshooting problems.
* Disconnect the negative terminal only: Disconnecting the positive terminal can be dangerous.
If you're experiencing persistent problems after trying a battery disconnect, it's best to take the car to a mechanic for diagnosis and repair. Simply resetting the PCM is not a solution for every problem.
