How to recharge my air conditioner?

how do you charge a/c,using unit from discount store with only one hose?

You only use one port to charge the AC in your automobile. It is called the low side and will have a black or blue cap marked with an L on it. Never charge it on the high side as damage or injury will result. If you cannot find the low side I would have someone who does car AC repair to do the work.

The AC clutch is not engaging and I can't figure out why.

Most likely the refrigerant has leaked out and the system is low on pressure. There's a low-pressure cutout switch to stop the compressor from engaging. You don't want it to run when there's a chance outside air could be drawn into the low side through a leak. The moisture in the air would form an acid that eats away the metal parts.

No leak checked the pressure and it was good churches fuses all good what else could it be

Control head, Engine Computer, low-pressure cutout switch, compressor clutch, wiring, . . .

Look for a clutch relay and activate or bypass it to see if the clutch engages. You can do that with the ignition switch off. If it engages, you know the clutch and all the wiring in that circuit are okay. The easiest way to bypass the relay is to pop its cover off, reinstall it that way, then squeeze the movable contact. You can use a stretched-out paper clip too to jump the terminals, but I don't know for sure which two.

Here's a drawing of the common Chrysler relays. If you have one that looks like these, you can jump terminals 30 and 87 together.

Where is the A/C low pressure [fill port] connection on a 2000 Taurus 3.0, six cylinder engine?
Thanks, Craig

Here are videos and guides to show you how to recharge your air condition system and find the charge port.

https://youtu.be/uZrQCGwXfek

and

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

and

https://youtu.be/ON2dYcmXIAw

and

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

and

https://www.2carpros.com/articles/how-a-car-air-conditioner-works

Let us know what happens and please upload pictures or videos of the problem.