The air compressor on a 1993 Lincoln Town Car with air suspension (not air brakes, Town Cars didn't have air *brakes*) is typically located in the engine compartment, often near the radiator or firewall. Its exact location can vary slightly depending on the specific model and any modifications. You'll likely find it by visually inspecting the engine bay for a relatively small, cylindrical tank with various air lines connected to it. It may also have a noticeable compressor whine when the engine is running and the suspension is adjusting.
If you're unsure, a repair manual specific to your 1993 Lincoln Town Car will have a diagram showing the location.
