No A/c In My 1993 Caravan

The A/c In My 93 Caravan Does Not Work. I Have Had The A/c System Recharged. The A/c Compressor Works (i Can Hear The Clutch Engage--only For 2 Or 3 Seconds At A Time!!). The A/c Guy Says That My A/c Relay Is Probably The Problem. My Problem Is Finding The Location Of The A/c Relay. Can Some Guide Me To Its Location? Also, Any Other Suggestions Would Be Appreciated.

Your A/C relay is just fine; if that was bad, your compressor wouldn't work. You have a leak somewhere. Go to a shop and have them put a dye in the system so they can trace where exactly the leak is at.