So i'm trying to replace the exterior light switch to a timer switch.
On the same switch panel, there are two other switches which control the ceiling lights in the hallway. The dimmer in the center is just a single switch, and the one to the right is a three way switch for another sets of pot lights.
SO the one I'd like to replace is the one on the left. The image at the bottom is how I connect the timer but does not work ...
any suggestions??