Dodge Repair: Dodge Ram Van heater - high & off only, blower motor resistor, dodge ram van

Question
I have a 2002 Dodge Van (Roadtrek conversion), but chassis/body should be more or less standard.  

The blower only works on high or off.  Your prior answer to a similar question is of value (blown heater resistor), but as an amateur I need a little more advice regarding what to look for and where it might be in a van configuration.

Is this something I can do myself or would it be better to take it in to the dealer?

Answer
REMOVAL - FRONT
Disconnect and isolate the battery negative cable.
Unplug the wire harness connector from the blower motor resistor, which is located on the inboard side of the heater-A/C housing (Front Blower Motor Resistor Remove/Install).
Remove the two screws that secure the blower motor resistor to the heater-A/C housing.
Remove the front blower motor resistor from the heater-A/C housing.