R134A refrigerant

please tell me where the low pressure filler cap is on an 2002 T-Bird so I may add R134A to my car.

[b]I could tell you, but I won’t.

If you can’t locate the low pressure fitting for your AC system, reason tells me this is something you shouldn’t even attempt.

Tester[/b]

Agreed, if you can’t find the low pressure port.
If the A/C is not engaging at all maybe it’s an electrical problem such as a fuse or relay.
If the system legitimately needs refrigerant then ask yourself where it went.
A leak is where.