I pulled the switch myself in the "yard" and it was in one piece. I checked it with a testing light and it seemed to be working at least enough to light the bulb in a variety of contact combinations. My daughter has been driving this car and she tells me the fan has been unreliable lately - sometimes working and sometimes not - though always with only high speeds. Hence the replacement of both switch and resistor. All the coils look good on the new resistor (it also looks identical to the old one), and as I said, I tested the fan and checked the fuses.
It is probably something simple I've overlooked, but I'm stumped.
Appreciate the help.
DB