Leaking Radiator Fluid (2000 XJ)
 

A few days back the "Check Gauges" light came on in my car, and the voltage was reading 9V, really low. I pulled over at a gas station, and saw that all the radiator fluid had drained out on the ground, it must've been spraying on the belt that charges the alternator or something. I filled it up with some more fluid but I can't seem to find out where the leak is coming from. I got under the car and I saw a green dot coming from my lower radiator hose, but I don't know if it's just runoff from the water pump above it or something. Still learning about the car so I apologize in advance if I stated anything incorrectly.

Rent a pressure tester. If you can't see the leak, you may have a cracked head considering you have a 2000

If it's a cracked head, doesn't that mean the oil would mix in with the coolant, making it look different? I checked my oil and it seems to be normal. As for the pressure tester, where can I find one?

not necessarily. But if you see a spot on one of the hoses, it could be there. But it's good to check. Autozone or oriellys