Blower motor speeds

[350MJ]

I purchased a cheap ford ranger from a police auction to get me around while I am working on my restomod for my comanche. With it getting colder I decided to try fixing the heat. It seams to be warm enough but my blower motor hasn't worked properly. It started with just low speed the two middle speed nothing and high speed. This is a textbook blower motor resistor right? So I replaced it. Now I get slow, a little bit faster but not by much, the same as the previous speed, and full force. What could be wrong with it? I could try another blower motor resistor in case this one is faulty but I doubt it.

[MuddFoot]

might be bad out of the box.. might be changing the blower itself too