A/C Blower resistor replacement (availability)

You may be able to clean that spring up for closer inspection. Vinegar?
Chk your FSM if it has resistance specs? And compare yours?
Well worth the effort.
I'm going to assume that's what a good resistor spring looks like and that mine is burnt (rusty at the least).

I think I'm going to get one of the echelin units and see if I can adapt it to my blower. It's only $9.