OP, are there any other wires within the switch box of the switch you're working on, which are not connected to the switch plate?
They maybe in a terminal block(s) in the back of the switch box?
Can you upload a few photos of the wires at the switch, and if possible, the wires at the light and fan too, but don't worry ablut the last two if it's a major PITA.
They maybe in a terminal block(s) in the back of the switch box?
Can you upload a few photos of the wires at the switch, and if possible, the wires at the light and fan too, but don't worry ablut the last two if it's a major PITA.