RV Repair: Leak under fridge, humidity conditions, high humidity

Question
We have a steady, constant drip under our Norcold Model N8421M refrigerator. All water lines are tight; we are not losing any pressure. We cannot figure out at all where this water is coming from. There are no water lines above the fridge, and the only one behind it goes to the ice maker, and it is not leaking.

My best guess is the drain in the back of the tray under the cooling fins, but I cannot get my hands on this line in any way shape or form.

How do we deal with this.

Thanks for your help.

Answer
HI THERE
A CONDENSATION LEAK WOULD NOT BE CONSTANT. AND NORMALLY ONLY IN HIGH HUMIDITY CONDITIONS. AND THE DRIPLINE GOES INTO A CATCH TRAY NORMALLY
ONE WAY TO CK IF IT IS THE PRESSURIZED SYSTEM ,IS TO TURN OFF THE CITY WATER AND TURN ON THE WATER PUMP.
WAIT A WHILE AD LISTEN FOR THE PUMP TO CYCLE IF IT DOES YOU HAVE A LEAK.
I'VE SEEN THE ICE MAKER LINES LEAK AND HIDE THEMSELVES.

THOM