That makes so much sense. Ill try getting more of the fixture apart soon. I usually only work on 12v electrical and it seemed like something was shorted in line to me. Thank you for the advice.

Okay so basically it would probably be that the one set goes in to the fixture and then it splits there and comes back to the switch ?

So behind the switch there is 2 incoming sets of wire, the one that goes to the lights, and the one that goes to the heater and fan. No breakers are flipped at all. Is there a way to follow the wire with no power back to the breaker ? (To check for a bad breaker possibly) or could I cap off the other set and use the wires from the lights to power everything if I replace the unit ?

Yes

Would the motor being bad explain the lack of voltage at the switch though ? Like it’s shorting in the motor or something ? It is very old fixture.