Update, I think the grounding issue is just the meter reading ground through the fan motor. Under further diagnosis both fans do it. Put in a ceramic fuse, and all is good for a week, A/C on the whole time, so about 15 hours of fans running on high speed. Only pulling 7ish amps. Concluding at this point it's the cheap Autozone fuses. One of these is 16A (red) and one 15A (black one). Fuse box is solid, and wires do not get hot, only the fuse.
