We'd love to help but
I installed 1 in the downstairs bath and now none of them are working......what'd I do wrong???
How could we possibly know what you did wrong? You gave no information.
Re check/tighten all connections. Line = power in, load = power out (GFCI protected)
2nd question is easier.
The two black wires are power in and power out. The red goes to the light.
Use the single pole
switch (says on/off and has 2 termin
A) Hook it up just like it was. Red to one screw terminal, black to one terminal, stab the second black into the back hole by the black wire
B) Make a pigtail. Cut a 6" piece of black wire, wire nut it tightly
with the 2 black wires and tuck it into the box. You now hace a black and a red that attach to the switch (terminals or backstab).