The low speed fan wasn't working, so I removed and replaced the resistor, which is a common issue. While replacing it, I discovered the original was definitely bad.
Well... That didn't fix it, apparently I got a bad resistor assembly.
So, it's impossible to get to without removing the bumper, crash bar, and AC condenser -- which means I'll get to it eventually, but I'm not looking forward to replacing it again.
I think I got a bad one from the parts supplier... Which sucks, because I'm probably going to have to remove it from the car to prove to them it's bad before they'll ship me a new one.
Oh well. Car doesn't overheat, the AC is cold, and there's no other issues, so I might put it off a bit.
Here's a fun pic of it next to a Honda.