Ventilation Woes

My 2001 Caravan Sport has some ventilation issues. Everything works great except the blower. The blower is off until I get to the fastest setting then it kicks on in high (the right speed for that setting). In every other position it's off. I think it may be the blower control circuit but I'm not sure as I have not had to work on an HVAC system in a few years. Is there anything I can check? Is the circuit easily replaceable?

Any help would be appreciated. Thanks.

Looking at the other posts I am going to replace the resistor block. Does the 2001 have any associated wiring/plugs I should replace with this as well?