Ice maker water leak?

I just purchased a used side by side that cools fine, but I am having problems with the water/ice maker. When I turn on the water, I get an immediate leak. It is as if a broken line, valve or what ever. It is coming from the top of the ice making tray. Any suggestions as to what it might be or how to troubleshoot?

Further inspection finds that the water is coming from here; from a silicon tube extending from the ceiling of the freezer. I am guessing that there is a float or weight valve somewhere that is not working. The icemaker does produce and deposit ice, but the water will not shut off on its own.

Yes, I did take the door off to instaul the fridge. Is it possible to have plugged the wrong wires together? The connections did look similar