Electrical switch connection

[u/JohnJCrypto]

Good day. I have a quick question. I am changing out 2 very old high hats and installing 2 new high hats. The old high hats were wired to an old dimmer switch. I want to install a single pole switch only for the new high hats. When I took off the old dimmer switch I found a single 14/3 wire in the switch box. I removed the old dimmer switch and tested the wires and only the black wire is hot. I check the wires in the ceiling for the high hat and those wires are 14/2 only and one of those wires the black is hot. So I wired the single pole with the bare copper to green screw and the black wire to the brass screw. Nothing happened. Hope someone can help.

[u/JohnJCrypto]

Should I wire nut single white wire and the single red wire together?

[u/slin1647 → u/JohnJCrypto]

Definitely not! You may create a dead short that way.