Any Electricians Here?

[Arnie Guida]

My new apartment building has a Paragon mechanical timer for the hallway lights. The guts were ripped out, so I found a new one and installed it. The conduit to the timer has 4 wires coming out of it. 2 whites, a black and a green. When I first found this deal, the two whites were twisted together and the lights were always on. The black and green were not connected to anything. There is a light switch below the timer, manual override? The light switch has black to the top, green to the bottom.

The clock runs when one white goes to the T terminal and the other white goes the M terminal.

Using a continuity tester, when the timer switch is on, terminals T and 4 have continuity.

Can I handle this myself or should I call someone?

By the by, I know there are cheaper ways to automate hallway lighting, but I bought the new timer already, and besides, my curiosity is piqued. I'd like to see it work now, it's a challenge!

Thank you,

Arnie