Hi, I am having a problem where my MOSFET instantly starts conducting when I connect a power supply. I have the gate signal from an Arduino Nano, which is tied low. I am nearly 100% sure I have the drain and the source wired correctly. I have created somewhat of a rough schematic which I have provided also. The load draws A LOT of current (8A). I'm not sure what is causing this. Any input would be greatly appreciated.