Hotchef, turn off the breaker to this circuit, double check with your meter that it is dead.
Then remove the wires from the right switch and clean all the corrosion off the wires.
And with the breaker off, put a wire nut on the red wire and black hot wire, you can leave the short black jumper out.
Now go turn on the breaker and check the pool light. It should come on if it is good, and you just determined if your new switch is junk.