Where is the thermostat on a 1989 Lincoln Town Car?

The thermostat on a 1989 Lincoln Town Car is located on the engine, typically underneath the intake manifold. It's not easily accessible and requires removing parts of the engine to reach it. You'll likely need a repair manual specific to that year and model to pinpoint its exact location and guide you through the removal and replacement process. The repair manual will show diagrams and provide specific instructions.