Just want to thank everyone for all the info on the motor blower and the resistor block. I just replaced the resistor block on my 98 Grand Caravan. It's located as mentioned previously on the firewall on the passenger side. I used a "plier like" oil filter remover to pry the resistor block out. The new one was set in a matter of minutes, without the cuts and scratches. Now the motor is blowing "cat 5" winds.
I purchased the resister block at my local dealer for $14 + change and tax. Thanks again!