Hello Gary & Judy:
One of our Alpine So Cal members had a bad hose going to the fan motor which would caused a sever leak which was in a fitting.
Once the hose and fittings were replaced the leak stopped. Clean the engine and fan first than you can use an ultra violet leak detector and place it in the reservoir.
You can run the engine and see if you can detect the leak if not, you will have to drive it for a short distance than you can look for the leak using a black light.
For the hose we went to the Hose Man (So Cal area) and they manufactured a new hose in about an hour.
They used the old hose as template.
I hope this helps.