66 Valiant heat/ac fan question

The blower motor is good because when I run 12v straight from the battery to it it works fine.

The resistor seems to be fine too, I'm getting (off the top of my head!) something like 2.0ohms resistance on one side, and .9ohms resistance from the lead closest to the wire going to the blower motor. If that resistor was bad though, I don't think it would blow the fuse, it would just make the adjustable speed not work. I'm thinking maybe it's a short, but I'll have to find for sure if anything else runs on that circuit too.