I have a switch indoors which controls two outdoor daylights. I opened the wall plate and found that it has two red wires and two black wires and one ground (so 5 terminals in all). I stuck a multimeter on them and only one of the black ones has voltage, the rest are all 0.
Now, I want to replace this whole thing with a timer switch, which has one line, one load and one neutral. I've taken care of the neutral (together with all the other neutrals in the box), but I am a bit confused about what to put in the line and load.
How can I make my timer switch control both the daylight bulbs? Also, what kind of a switch is that, which has five terminals?