ac pumps

AC problem. Water lines clear and no air lock. AC compressor comes on but not pump so AC shuts down. Either pump is faulty or pump relay ( have three units) is faulty or both. How can I tell which to replace? Thank you, Billy M

My AC pump is dangling from the broken mount. Does anyone know a part # for the mount? I can't look at it since we are travelling on the boat and left it for a while. I hope to bring the new part when we return. Thanks!