1997 Dodge Caravan front blower motor

My front blower motor switch does not work. My rear does. I pulled out the relay located inside engine compartment and it was badly rusted. Replaced this, and still no go. Fuse panel inside above gas and brake pedals only has 20 amp fuse for rear fan. It is fine. Tried a test today, by taking 40 amp fuse for horn out and square resistor next to it and put them in blower motor location(engine fuse box) and still nothing. My rear fan would not work at this time. Put everything back to where it belonged, rear fan back on, front fan or blower not working. 40 amp fuses are $ 4.99 ea. I cant find resistor block. Should I bother?