"As of now only one thing appears to not be working, the heater fan switch. Want to see if it's a fuse"
In another post you said it was an '84 and fuse #7 was burning thru?
"I finally was able to find a gem of an 84 Sider Veloce"
so 84 or 87?
Anyway lets presume 87....
if it was the fuse, the back ups, the cigar lighter, the speedo would all be out as well.
the heater fan is a weak point (well, one of them

) on the spider.
when you flick the switch [speed 1, real slow, or speed 2, not much better] does the dash fan light come on?
If so, that would suggest switch is OK.
look under the dash above the gas pedal and you will see the connections for the fan....apply direct power to the red or to the blue (they are the 2 speeds) and see if the fan spins...
If not it could be seized....try wiggle your fingers into the side vent and downwards (slide the control sort of half way to get in there) and you can just touch the fan, or use a pencil or something....does it spin real easy or is it hard to turn.
more info here:
How to troubleshoot heater fan on 87 Veloce?