I've never fiddled with the resistor, but if you take a look under your dash behind the glove box you'll be looking right at the blower motor. It's held in place with 4 phillips screws and has a captive plug for the power connection. To exchange with a replacement simply squeeze the plug while pulling to remove, then unscrew the four screws with a hand on the blower assembly to keep it from falling on you. Once out you'll see how simple it is, replacement is reverse of above.