Hi, I just had this issue on my 08 GT/CS. It turns out the resistor cable was the issue. This cable has a coil on it and a thermal cutoff. If the coil gets too hot, which I assume is from the fan motor pulling too much current, the thermal cutoff will open. You can measure continuity across thermal cutoff. If cutoff is good, it should read 0 ohms. If bad there will be no continuity. Im getting ready to buy a new one today. Good luck.