1998 ford cv blower motor ? /switch? problem

I turned on blower motor the other a.m. and it did not
come on... later that evening got back in and turned it on and presto it worked.. this a.m nothing again..
won`t be long and its gonna be -45 below again so i need to git er done,as they say.....
i would appreciate any help on what the problem is

does it work on the highest fan setting but not on any of the other/?

resistor card is the problem