Where is the A/C compressor control relay located?

There isn't one. It is controlled through the A/C amplifier module. What is the issue, no A/C control? If yes take a jumper wire and test the clutch by applying battery voltage to the terminal the black wire with white stripe is on. That will activate the clutch. If it clicks, it's okay. Check the A/C fuse in the driver's side fuse box if you don't see the light come on with the A/C switch it may be blown. Beyond that you may want to check the system's refrigerant pressure as well. Low or no charge could also cause it to stop working.

The viewport should show fluid and a few bubbles, but you need the compressor running to see those. The terminal is on the clutch. There is one that grounds through the engine and the other is where you can apply power, if they used a 2-pin plug one should show ground, apply power to the one with the black wire with a white stripe.

Okay, if it is turning on it's likely a low charge. I would get a gauge set and check the pressures. With a low charge the compressor kicks on, pulls in the refrigerant and starts working, then there isn't enough for it to continue, and it shuts off due to the low pressure.
This may give you some help in that. I would do a good leak check as it's a 22-year-old system.
https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Just checking to see if you had any luck so far.

Understood. With the price and wait times on parts I'm looking at horses. LOL

Hi,

I noticed we haven't heard from you for a few days. Have you been able to make any progress? We are interested in knowing.

If you have a chance, let us know.

Take care and we hope you have a good Thanksgiving.

Joe

Hi,

No problem. We just like to make sure people get things working again.

Have a great Thanksgiving and when you have a chance, let us know how things turn out for you.

Take care,

Joe