Can the air suspension on a 2000 town car be manually accessedAlso is there compressor and where it located?

No, the air suspension on a 2000 Lincoln Town Car cannot be manually accessed in the sense of directly controlling the ride height. There's no manual lever or switch to raise or lower it. The system is entirely controlled by onboard sensors and the air compressor.

The air compressor for the air suspension is typically located in the trunk (boot) area. It's usually near the spare tire well, often somewhat hidden and might be covered. It's a fairly sizable unit, noticeably larger than a typical automotive compressor. You might need a flashlight to locate it precisely.

While you can't manually adjust the height, if you suspect a problem with the air suspension (like a leak or malfunctioning compressor), you would need to have it diagnosed and repaired by a mechanic specializing in air suspension systems.