To be absolutely sure, you should:
* Consult your owner's manual: This is the best resource for the exact location in your specific vehicle.
* Look for a large, rectangular black box with numerous connectors: This is usually a strong indicator of the PCM's location.
* Check online forums specific to 1996 Ford Thunderbirds: Enthusiast forums often have pictures and detailed descriptions of component locations.
Remember to disconnect the negative battery terminal before attempting any work near the PCM.